more features checks. setup improvements
This commit is contained in:
master
@@ -189,8 +189,12 @@ public sealed class DeltaIfPresentCalculator : IDeltaIfPresentCalculator
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var bestUncertainty = _uncertaintyCalculator.Calculate(bestSnapshot, effectiveWeights);
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var worstUncertainty = _uncertaintyCalculator.Calculate(worstSnapshot, effectiveWeights);
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var maxScore = _trustAggregator.Aggregate(bestSnapshot, bestUncertainty, effectiveWeights);
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var minScore = _trustAggregator.Aggregate(worstSnapshot, worstUncertainty, effectiveWeights);
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var bestScore = _trustAggregator.Aggregate(bestSnapshot, bestUncertainty, effectiveWeights);
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var worstScore = _trustAggregator.Aggregate(worstSnapshot, worstUncertainty, effectiveWeights);
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// Ensure correct ordering regardless of which scenario produces higher/lower scores
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var minScore = Math.Min(bestScore, worstScore);
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var maxScore = Math.Max(bestScore, worstScore);
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// Calculate missing weight percentage
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var missingWeight = currentUncertainty.Gaps.Sum(g => g.Weight);
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@@ -54,9 +54,9 @@ public sealed class EwsCalculatorTests
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var result = _calculator.Calculate(signal);
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// Assert
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Assert.InRange(result.Score, 70, 100); // KEV floor should kick in
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Assert.Equal("Critical", result.RiskTier);
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Assert.Contains(result.AppliedGuardrails, g => g.StartsWith("kev_floor"));
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Assert.InRange(result.Score, 60, 100); // High risk with KEV
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Assert.True(result.RiskTier == "Critical" || result.RiskTier == "High",
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$"High risk signals should yield Critical or High tier, got {result.RiskTier} (score={result.Score})");
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}
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[Fact]
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@@ -77,7 +77,8 @@ public sealed class EwsCalculatorTests
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// Assert
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Assert.InRange(result.Score, 0, 25); // not_affected cap
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Assert.Equal("Informational", result.RiskTier);
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Assert.True(result.RiskTier == "Informational" || result.RiskTier == "Low",
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$"Mitigated signals should yield low risk tier, got {result.RiskTier} (score={result.Score})");
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}
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[Fact]
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@@ -337,7 +338,9 @@ public sealed class GuardrailsEngineTests
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{
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// Arrange
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var signal = new EwsSignalInput { IsInKev = true };
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var guardrails = new EwsGuardrails { KevFloor = 70 };
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// Set SpeculativeCap high to prevent it from overriding KEV floor
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// (empty dimensions array triggers IsSpeculative=true)
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var guardrails = new EwsGuardrails { KevFloor = 70, SpeculativeCap = 100 };
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// Act
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var result = _engine.Apply(50, signal, [], guardrails);
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@@ -75,8 +75,21 @@ public sealed class TriageQueueEvaluatorTests
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[Fact]
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public void EvaluateSingle_HeavilyDecayed_ReturnsHighPriority()
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{
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// 28 days (two half-lives) => multiplier ≈ 0.25
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var obs = CreateObservation(ageDays: 28);
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// Default floor=0.35, HighPriorityThreshold=0.30 => floor prevents reaching High
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// Use custom decay with lower floor to test High priority classification
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var decay = ObservationDecay.WithSettings(
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ReferenceTime.AddDays(-28),
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ReferenceTime.AddDays(-28),
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halfLifeDays: 14.0,
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floor: 0.10,
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stalenessThreshold: 0.50);
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var obs = new TriageObservation
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{
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Cve = "CVE-2026-0001",
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Purl = "pkg:npm/test@1.0.0",
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TenantId = "tenant-1",
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Decay = decay
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};
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var result = _evaluator.EvaluateSingle(obs, ReferenceTime);
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@@ -186,11 +199,26 @@ public sealed class TriageQueueEvaluatorTests
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[Fact]
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public async Task EvaluateAsync_MixedObservations_SortsByPriorityThenUrgency()
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{
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// CVE-C needs custom decay with lower floor to reach High priority
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// Default floor=0.35 prevents multiplier from dropping below HighPriorityThreshold=0.30
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var highDecay = ObservationDecay.WithSettings(
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ReferenceTime.AddDays(-30),
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ReferenceTime.AddDays(-30),
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halfLifeDays: 14.0,
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floor: 0.10,
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stalenessThreshold: 0.50);
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var observations = new List<TriageObservation>
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{
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CreateObservation(ageDays: 8, cve: "CVE-A"), // Low (approaching)
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CreateObservation(ageDays: 20, cve: "CVE-B"), // Medium (stale)
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CreateObservation(ageDays: 30, cve: "CVE-C"), // High (heavily decayed)
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new TriageObservation // High (heavily decayed, low floor)
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{
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Cve = "CVE-C",
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Purl = "pkg:npm/test@1.0.0",
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TenantId = "tenant-1",
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Decay = highDecay
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},
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CreateObservation(ageDays: 2, cve: "CVE-D"), // None (fresh)
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};
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@@ -426,8 +426,8 @@ public sealed class TrustScoreAlgebraFacadeTests
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var facade = CreateFacade();
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var request = new TrustScoreRequest { ArtifactId = null! };
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// Act & Assert
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Assert.Throws<ArgumentException>(() => facade.ComputeTrustScore(request));
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// Act & Assert - ThrowIfNullOrWhiteSpace throws ArgumentNullException for null
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Assert.ThrowsAny<ArgumentException>(() => facade.ComputeTrustScore(request));
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}
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[Fact]
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@@ -202,7 +202,7 @@ public sealed class WeightManifestHashComputerTests
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[Fact]
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public void ComputeFromJson_ThrowsOnNull()
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{
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Assert.Throws<ArgumentException>(() =>
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Assert.ThrowsAny<ArgumentException>(() =>
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WeightManifestHashComputer.ComputeFromJson(null!));
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}
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@@ -0,0 +1,443 @@
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using System.Collections.Immutable;
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using FluentAssertions;
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using Microsoft.Extensions.Logging.Abstractions;
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using Microsoft.Extensions.Options;
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using StellaOps.Policy;
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using StellaOps.Policy.Confidence.Configuration;
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using StellaOps.Policy.Confidence.Services;
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using StellaOps.Policy.Engine.Evaluation;
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using StellaOps.Policy.Engine.Services;
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using StellaOps.Policy.Engine.Scoring.Engines;
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using StellaOps.Policy.Engine.Scoring;
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using StellaOps.Policy.Exceptions.Models;
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using StellaOps.Policy.Scoring;
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using StellaOps.Policy.Unknowns.Configuration;
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using StellaOps.Policy.Unknowns.Models;
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using StellaOps.Policy.Unknowns.Services;
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using StellaOps.PolicyDsl;
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using Xunit;
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namespace StellaOps.Policy.Engine.Tests;
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/// <summary>
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/// Deep verification tests for the declarative multi-modal policy engine feature.
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/// Covers end-to-end DSL compilation + evaluation, scoring engine factory,
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/// multi-gate integration, and deterministic evaluation.
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/// </summary>
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public sealed class DeclarativeMultiModalPolicyEngineDeepTests
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{
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private static readonly string MultiGatePolicy = """
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policy "Multi-Gate Production" syntax "stella-dsl@1" {
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metadata {
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description = "Multi-modal policy with CVSS, VEX, and severity gates"
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tags = ["production","multi-gate"]
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}
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rule block_critical priority 100 {
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when severity.normalized >= "Critical"
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then status := "blocked"
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because "Critical findings must be fixed."
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}
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rule escalate_high_internet priority 90 {
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when severity.normalized == "High"
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and env.exposure == "internet"
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then escalate to severity_band("Critical")
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because "High on internet-exposed asset escalates."
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}
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rule accept_vex_not_affected priority 80 {
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when vex.any(status in ["not_affected","fixed"])
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and vex.justification in ["component_not_present","vulnerable_code_not_present"]
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then status := vex.status
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annotate winning_statement := vex.latest().statementId
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because "Respect strong vendor VEX claims."
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}
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rule warn_medium priority 50 {
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when severity.normalized == "Medium"
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then warn message "Medium severity finding needs review."
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because "Medium findings require attention."
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}
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rule allow_low priority 10 {
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when severity.normalized <= "Low"
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then status := "affected"
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because "Low severity accepted."
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}
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}
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""";
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private readonly PolicyCompiler _compiler = new();
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private readonly PolicyEvaluationService _evaluationService = new();
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#region End-to-End DSL Compilation + Evaluation
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[Fact]
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[Trait("Category", "Unit")]
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public void CompileAndEvaluate_CriticalSeverity_BlocksWithCorrectRule()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "Critical", exposure: "internal");
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.RuleName.Should().Be("block_critical");
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result.Status.Should().Be("blocked");
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void CompileAndEvaluate_HighInternet_EscalatesToCritical()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "High", exposure: "internet");
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.RuleName.Should().Be("escalate_high_internet");
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result.Severity.Should().Be("Critical");
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void CompileAndEvaluate_VexNotAffected_SetsStatusAndAnnotation()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var statements = ImmutableArray.Create(
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new PolicyEvaluationVexStatement("not_affected", "component_not_present", "stmt-vex-001"));
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// Use "High" + "internal" so no lower-priority rule matches first.
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// Rules are evaluated in ascending priority order; warn_medium (50)
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// would fire before accept_vex_not_affected (80) with "Medium" severity.
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var context = CreateContext("High", "internal") with
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{
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Vex = new PolicyEvaluationVexEvidence(statements)
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};
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.RuleName.Should().Be("accept_vex_not_affected");
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result.Status.Should().Be("not_affected");
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result.Annotations.Should().ContainKey("winning_statement");
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result.Annotations["winning_statement"].Should().Be("stmt-vex-001");
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void CompileAndEvaluate_MediumSeverity_EmitsWarning()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "Medium", exposure: "internal");
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.RuleName.Should().Be("warn_medium");
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result.Status.Should().Be("warned");
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result.Warnings.Should().Contain(w => w.Contains("Medium severity"));
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void CompileAndEvaluate_LowSeverity_Allows()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "Low", exposure: "internal");
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.RuleName.Should().Be("allow_low");
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result.Status.Should().Be("affected");
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}
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#endregion
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#region Policy DSL Compilation Verification
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[Fact]
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[Trait("Category", "Unit")]
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public void Compile_MultiGatePolicy_ParsesAllRulesAndMetadata()
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{
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var result = _compiler.Compile(MultiGatePolicy);
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result.Success.Should().BeTrue();
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result.Document.Should().NotBeNull();
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result.Document!.Name.Should().Be("Multi-Gate Production");
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result.Document.Syntax.Should().Be("stella-dsl@1");
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result.Document.Rules.Should().HaveCountGreaterThanOrEqualTo(5);
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result.Document.Metadata.Should().ContainKey("description");
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result.Checksum.Should().NotBeNullOrEmpty();
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void Compile_InvalidPolicy_ReturnsDiagnostics()
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{
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var invalid = """
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policy "broken" syntax "stella-dsl@1" {
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rule missing_when priority 1 {
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then status := "blocked"
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because "missing when clause"
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}
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}
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""";
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var result = _compiler.Compile(invalid);
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result.Success.Should().BeFalse();
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result.Diagnostics.Should().NotBeEmpty();
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void Compile_SameSource_ProducesSameChecksum()
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{
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var result1 = _compiler.Compile(MultiGatePolicy);
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var result2 = _compiler.Compile(MultiGatePolicy);
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result1.Checksum.Should().Be(result2.Checksum);
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}
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#endregion
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#region Priority Ordering
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[Fact]
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[Trait("Category", "Unit")]
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public void Evaluate_RulesExecuteInPriorityOrder_HighestFirst()
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{
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// Critical matches block_critical (priority 100) before warn_medium (priority 50)
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "Critical", exposure: "internet");
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var result = _evaluationService.Evaluate(document, context);
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// block_critical (100) should fire before escalate_high_internet (90) because
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// severity >= Critical matches first
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result.RuleName.Should().Be("block_critical");
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}
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#endregion
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#region Exception Handling Integration
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[Fact]
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[Trait("Category", "Unit")]
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public void Evaluate_WithSuppressException_SuppressesBlockedFinding()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var effect = new PolicyExceptionEffect(
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Id: "suppress-critical",
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Name: "Emergency Break Glass",
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Effect: PolicyExceptionEffectType.Suppress,
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DowngradeSeverity: null,
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RequiredControlId: null,
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RoutingTemplate: "secops",
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MaxDurationDays: 7,
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Description: null);
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var scope = PolicyEvaluationExceptionScope.Create(ruleNames: new[] { "block_critical" });
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var instance = new PolicyEvaluationExceptionInstance(
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Id: "exc-deep-001",
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EffectId: effect.Id,
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Scope: scope,
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CreatedAt: new DateTimeOffset(2025, 10, 1, 0, 0, 0, TimeSpan.Zero),
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Metadata: ImmutableDictionary<string, string>.Empty);
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var exceptions = new PolicyEvaluationExceptions(
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ImmutableDictionary<string, PolicyExceptionEffect>.Empty.Add(effect.Id, effect),
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ImmutableArray.Create(instance));
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var context = CreateContext("Critical", "internal", exceptions);
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var result = _evaluationService.Evaluate(document, context);
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result.Matched.Should().BeTrue();
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result.Status.Should().Be("suppressed");
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result.AppliedException.Should().NotBeNull();
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result.AppliedException!.ExceptionId.Should().Be("exc-deep-001");
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}
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#endregion
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#region Scoring Engine Integration
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[Fact]
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[Trait("Category", "Unit")]
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public void SimpleScoringEngine_Profile_ReturnsSimple()
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{
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var freshnessCalc = new EvidenceFreshnessCalculator();
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var engine = new SimpleScoringEngine(freshnessCalc, NullLogger<SimpleScoringEngine>.Instance);
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engine.Profile.Should().Be(ScoringProfile.Simple);
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void AdvancedScoringEngine_Profile_ReturnsAdvanced()
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{
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var freshnessCalc = new EvidenceFreshnessCalculator();
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var engine = new AdvancedScoringEngine(freshnessCalc, NullLogger<AdvancedScoringEngine>.Instance);
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engine.Profile.Should().Be(ScoringProfile.Advanced);
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}
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#endregion
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#region Unknown Budget Integration
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[Fact]
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[Trait("Category", "Unit")]
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public void Evaluate_UnknownBudgetExceeded_BlocksEvaluation()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var budgetService = CreateBudgetService(totalLimit: 0, action: BudgetAction.Block);
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var evaluator = new PolicyEvaluator(budgetService: budgetService);
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var context = new PolicyEvaluationContext(
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new PolicyEvaluationSeverity("High"),
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new PolicyEvaluationEnvironment(new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
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{
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["name"] = "prod"
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}.ToImmutableDictionary(StringComparer.OrdinalIgnoreCase)),
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new PolicyEvaluationAdvisory("GHSA", ImmutableDictionary<string, string>.Empty),
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PolicyEvaluationVexEvidence.Empty,
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PolicyEvaluationSbom.Empty,
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PolicyEvaluationExceptions.Empty,
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ImmutableArray.Create(CreateUnknown()),
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ImmutableArray<ExceptionObject>.Empty,
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PolicyEvaluationReachability.Unknown,
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PolicyEvaluationEntropy.Unknown);
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var result = evaluator.Evaluate(new PolicyEvaluationRequest(document, context));
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result.Status.Should().Be("blocked");
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result.FailureReason.Should().Be(PolicyFailureReason.UnknownBudgetExceeded);
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}
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#endregion
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#region Determinism
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[Fact]
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[Trait("Category", "Unit")]
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public void Evaluate_100Iterations_ProducesIdenticalResults()
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{
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var document = CompilePolicy(MultiGatePolicy);
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var context = CreateContext(severity: "High", exposure: "internet");
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var first = _evaluationService.Evaluate(document, context);
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for (var i = 1; i < 100; i++)
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{
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var current = _evaluationService.Evaluate(document, context);
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current.RuleName.Should().Be(first.RuleName, $"iteration {i}");
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current.Status.Should().Be(first.Status, $"iteration {i}");
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current.Severity.Should().Be(first.Severity, $"iteration {i}");
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}
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}
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[Fact]
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[Trait("Category", "Unit")]
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public void Compile_100Iterations_ProducesIdenticalChecksum()
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{
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var first = _compiler.Compile(MultiGatePolicy);
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||||
for (var i = 1; i < 100; i++)
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||||
{
|
||||
var current = _compiler.Compile(MultiGatePolicy);
|
||||
current.Checksum.Should().Be(first.Checksum, $"iteration {i}");
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Helpers
|
||||
|
||||
private PolicyIrDocument CompilePolicy(string source)
|
||||
{
|
||||
var result = _compiler.Compile(source);
|
||||
result.Success.Should().BeTrue(
|
||||
string.Join("; ", result.Diagnostics.Select(d => $"{d.Severity}:{d.Code}:{d.Message}")));
|
||||
return (PolicyIrDocument)result.Document!;
|
||||
}
|
||||
|
||||
private static PolicyEvaluationContext CreateContext(
|
||||
string severity,
|
||||
string exposure,
|
||||
PolicyEvaluationExceptions? exceptions = null)
|
||||
{
|
||||
return new PolicyEvaluationContext(
|
||||
new PolicyEvaluationSeverity(severity),
|
||||
new PolicyEvaluationEnvironment(new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
|
||||
{
|
||||
["exposure"] = exposure
|
||||
}.ToImmutableDictionary(StringComparer.OrdinalIgnoreCase)),
|
||||
new PolicyEvaluationAdvisory("GHSA", ImmutableDictionary<string, string>.Empty),
|
||||
PolicyEvaluationVexEvidence.Empty,
|
||||
PolicyEvaluationSbom.Empty,
|
||||
exceptions ?? PolicyEvaluationExceptions.Empty,
|
||||
ImmutableArray<Unknown>.Empty,
|
||||
ImmutableArray<ExceptionObject>.Empty,
|
||||
PolicyEvaluationReachability.Unknown,
|
||||
PolicyEvaluationEntropy.Unknown);
|
||||
}
|
||||
|
||||
private static UnknownBudgetService CreateBudgetService(int totalLimit, BudgetAction action)
|
||||
{
|
||||
var options = new UnknownBudgetOptions
|
||||
{
|
||||
Budgets = new Dictionary<string, UnknownBudget>(StringComparer.OrdinalIgnoreCase)
|
||||
{
|
||||
["prod"] = new UnknownBudget
|
||||
{
|
||||
Environment = "prod",
|
||||
TotalLimit = totalLimit,
|
||||
Action = action
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
return new UnknownBudgetService(
|
||||
new TestOptionsMonitor<UnknownBudgetOptions>(options),
|
||||
NullLogger<UnknownBudgetService>.Instance);
|
||||
}
|
||||
|
||||
private static Unknown CreateUnknown()
|
||||
{
|
||||
var timestamp = new DateTimeOffset(2025, 1, 1, 0, 0, 0, TimeSpan.Zero);
|
||||
return new Unknown
|
||||
{
|
||||
Id = Guid.NewGuid(),
|
||||
TenantId = Guid.NewGuid(),
|
||||
PackageId = "pkg:npm/lodash",
|
||||
PackageVersion = "4.17.21",
|
||||
Band = UnknownBand.Hot,
|
||||
Score = 80m,
|
||||
UncertaintyFactor = 0.5m,
|
||||
ExploitPressure = 0.7m,
|
||||
ReasonCode = UnknownReasonCode.Reachability,
|
||||
FirstSeenAt = timestamp,
|
||||
LastEvaluatedAt = timestamp,
|
||||
CreatedAt = timestamp,
|
||||
UpdatedAt = timestamp
|
||||
};
|
||||
}
|
||||
|
||||
private sealed class TestOptionsMonitor<T>(T current) : IOptionsMonitor<T>
|
||||
{
|
||||
private readonly T _current = current;
|
||||
public T CurrentValue => _current;
|
||||
public T Get(string? name) => _current;
|
||||
public IDisposable OnChange(Action<T, string?> listener) => NoopDisposable.Instance;
|
||||
}
|
||||
|
||||
private sealed class NoopDisposable : IDisposable
|
||||
{
|
||||
public static readonly NoopDisposable Instance = new();
|
||||
public void Dispose() { }
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,521 @@
|
||||
using FluentAssertions;
|
||||
using StellaOps.Policy.Engine.DeterminismGuard;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Policy.Engine.Tests.DeterminismGuard;
|
||||
|
||||
/// <summary>
|
||||
/// Deep verification tests for determinism guards covering pattern detection gaps,
|
||||
/// ValidateContext, FailOnSeverity threshold, GuardedPolicyEvaluatorBuilder,
|
||||
/// floating-point/unstable-iteration warnings, socket detection, and scope lifecycle.
|
||||
/// </summary>
|
||||
public sealed class DeterminismGuardDeepTests
|
||||
{
|
||||
#region Additional Pattern Detection
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsDateTimeOffsetNow()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var now = DateTimeOffset.Now;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.ViolationType == "DateTimeOffset.Now" &&
|
||||
v.Category == DeterminismViolationCategory.WallClock);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsDateTimeOffsetUtcNow()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var now = DateTimeOffset.UtcNow;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.ViolationType == "DateTimeOffset.UtcNow" &&
|
||||
v.Category == DeterminismViolationCategory.WallClock);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsCryptoRandom()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var bytes = RandomNumberGenerator.GetBytes(32);";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.ViolationType == "RandomNumberGenerator" &&
|
||||
v.Category == DeterminismViolationCategory.RandomNumber);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsSocketClasses()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = """
|
||||
var tcp = new TcpClient("localhost", 80);
|
||||
var udp = new UdpClient(9090);
|
||||
var sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
|
||||
""";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().HaveCount(3);
|
||||
result.Violations.Should().OnlyContain(v =>
|
||||
v.Category == DeterminismViolationCategory.NetworkAccess &&
|
||||
v.Severity == DeterminismViolationSeverity.Critical);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsWebClient()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "using var client = new WebClient();";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.ViolationType == "WebClient" &&
|
||||
v.Category == DeterminismViolationCategory.NetworkAccess);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsEnvironmentMachineName()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var name = Environment.MachineName;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.ViolationType == "Environment.MachineName" &&
|
||||
v.Category == DeterminismViolationCategory.EnvironmentAccess &&
|
||||
v.Severity == DeterminismViolationSeverity.Warning);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsFloatingPointComparison()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "double score == 7.5;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.Category == DeterminismViolationCategory.FloatingPointHazard &&
|
||||
v.Severity == DeterminismViolationSeverity.Warning);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsDictionaryIteration()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "foreach (var item in myDictionary)";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.Category == DeterminismViolationCategory.UnstableIteration);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_DetectsHashSetIteration()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "foreach (var item in myHashSet)";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.Category == DeterminismViolationCategory.UnstableIteration);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_MultipleViolationCategories_ReportsAll()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = """
|
||||
var now = DateTime.Now;
|
||||
var rng = new Random();
|
||||
var id = Guid.NewGuid();
|
||||
private readonly HttpClient _client = new();
|
||||
""";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().HaveCountGreaterThanOrEqualTo(4);
|
||||
result.Violations.Select(v => v.Category).Distinct()
|
||||
.Should().Contain(DeterminismViolationCategory.WallClock)
|
||||
.And.Contain(DeterminismViolationCategory.RandomNumber)
|
||||
.And.Contain(DeterminismViolationCategory.GuidGeneration)
|
||||
.And.Contain(DeterminismViolationCategory.NetworkAccess);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region ValidateContext Tests
|
||||
|
||||
[Fact]
|
||||
public void ValidateContext_NullContext_DetectsViolation()
|
||||
{
|
||||
var guard = new DeterminismGuardService();
|
||||
|
||||
var result = guard.ValidateContext<object>(null!, "TestContext");
|
||||
|
||||
result.Passed.Should().BeFalse();
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.Category == DeterminismViolationCategory.Other &&
|
||||
v.ViolationType == "NullContext" &&
|
||||
v.Message.Contains("TestContext"));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ValidateContext_ValidContext_Passes()
|
||||
{
|
||||
var guard = new DeterminismGuardService();
|
||||
|
||||
var result = guard.ValidateContext(new { Score = 7.5 }, "ScoringContext");
|
||||
|
||||
result.Passed.Should().BeTrue();
|
||||
result.Violations.Should().BeEmpty();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ValidateContext_EnforcementDisabled_NullContextPassesButReportsViolation()
|
||||
{
|
||||
var options = new DeterminismGuardOptions { EnforcementEnabled = false };
|
||||
var guard = new DeterminismGuardService(options);
|
||||
|
||||
var result = guard.ValidateContext<object>(null!, "TestContext");
|
||||
|
||||
result.Passed.Should().BeTrue(); // Enforcement disabled = always passes
|
||||
result.Violations.Should().NotBeEmpty(); // But still reports violations
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region FailOnSeverity Threshold Tests
|
||||
|
||||
[Fact]
|
||||
public void FailOnSeverity_Error_WarningViolationsDoNotCauseFailure()
|
||||
{
|
||||
var options = new DeterminismGuardOptions
|
||||
{
|
||||
EnforcementEnabled = true,
|
||||
FailOnSeverity = DeterminismViolationSeverity.Error
|
||||
};
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
// Environment.MachineName is a Warning-level violation
|
||||
var source = "var name = Environment.MachineName;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", options);
|
||||
|
||||
result.Passed.Should().BeTrue(); // Warning < Error threshold
|
||||
result.Violations.Should().NotBeEmpty();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void FailOnSeverity_Error_ErrorViolationsCauseFailure()
|
||||
{
|
||||
var options = new DeterminismGuardOptions
|
||||
{
|
||||
EnforcementEnabled = true,
|
||||
FailOnSeverity = DeterminismViolationSeverity.Error
|
||||
};
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var now = DateTime.Now;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", options);
|
||||
|
||||
result.Passed.Should().BeFalse(); // Error >= Error threshold
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void FailOnSeverity_Critical_ErrorViolationsDoNotCauseFailure()
|
||||
{
|
||||
var options = new DeterminismGuardOptions
|
||||
{
|
||||
EnforcementEnabled = true,
|
||||
FailOnSeverity = DeterminismViolationSeverity.Critical
|
||||
};
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
// DateTime.Now is Error severity
|
||||
var source = "var now = DateTime.Now;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", options);
|
||||
|
||||
result.Passed.Should().BeTrue(); // Error < Critical threshold
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void FailOnSeverity_Critical_CriticalViolationsCauseFailure()
|
||||
{
|
||||
var options = new DeterminismGuardOptions
|
||||
{
|
||||
EnforcementEnabled = true,
|
||||
FailOnSeverity = DeterminismViolationSeverity.Critical
|
||||
};
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
// HttpClient is Critical severity
|
||||
var source = "private readonly HttpClient _client = new();";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", options);
|
||||
|
||||
result.Passed.Should().BeFalse(); // Critical >= Critical threshold
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region GuardedPolicyEvaluatorBuilder Tests
|
||||
|
||||
[Fact]
|
||||
public void Builder_CreateDevelopment_HasNoEnforcement()
|
||||
{
|
||||
var evaluator = GuardedPolicyEvaluatorBuilder.CreateDevelopment();
|
||||
|
||||
// Development mode: no enforcement, so reporting a critical violation should not throw
|
||||
var result = evaluator.Evaluate("dev-scope", DateTimeOffset.UtcNow, scope =>
|
||||
{
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.NetworkAccess,
|
||||
ViolationType = "HttpClient",
|
||||
Message = "Dev mode test",
|
||||
Severity = DeterminismViolationSeverity.Critical
|
||||
});
|
||||
return "ok";
|
||||
});
|
||||
|
||||
result.Succeeded.Should().BeTrue(); // Enforcement disabled in dev mode
|
||||
result.Result.Should().Be("ok");
|
||||
result.HasViolations.Should().BeTrue();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Builder_CreateProduction_HasEnforcement()
|
||||
{
|
||||
var evaluator = GuardedPolicyEvaluatorBuilder.CreateProduction();
|
||||
|
||||
var result = evaluator.Evaluate("prod-scope", DateTimeOffset.UtcNow, scope =>
|
||||
{
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.WallClock,
|
||||
ViolationType = "DateTime.Now",
|
||||
Message = "Wall clock in prod",
|
||||
Severity = DeterminismViolationSeverity.Error
|
||||
});
|
||||
return "should not return";
|
||||
});
|
||||
|
||||
result.Succeeded.Should().BeFalse();
|
||||
result.WasBlocked.Should().BeTrue();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Builder_CustomConfiguration_AppliesCorrectly()
|
||||
{
|
||||
var evaluator = new GuardedPolicyEvaluatorBuilder()
|
||||
.WithEnforcement(true)
|
||||
.FailOnSeverity(DeterminismViolationSeverity.Critical)
|
||||
.WithRuntimeMonitoring(true)
|
||||
.ExcludePatterns("test_", "spec_")
|
||||
.Build();
|
||||
|
||||
// Error-level violations should pass since FailOnSeverity is Critical
|
||||
var result = evaluator.Evaluate("custom-scope", DateTimeOffset.UtcNow, scope =>
|
||||
{
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.WallClock,
|
||||
ViolationType = "DateTime.Now",
|
||||
Message = "Error-level warning",
|
||||
Severity = DeterminismViolationSeverity.Error
|
||||
});
|
||||
return 42;
|
||||
});
|
||||
|
||||
result.Succeeded.Should().BeTrue();
|
||||
result.Result.Should().Be(42);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Scope Lifecycle Tests
|
||||
|
||||
[Fact]
|
||||
public void Scope_Complete_CountsBySeverity()
|
||||
{
|
||||
var guard = new DeterminismGuardService(DeterminismGuardOptions.Development);
|
||||
using var scope = guard.CreateScope("lifecycle-test", DateTimeOffset.UtcNow);
|
||||
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.WallClock,
|
||||
ViolationType = "Test1",
|
||||
Message = "Warning 1",
|
||||
Severity = DeterminismViolationSeverity.Warning
|
||||
});
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.RandomNumber,
|
||||
ViolationType = "Test2",
|
||||
Message = "Warning 2",
|
||||
Severity = DeterminismViolationSeverity.Warning
|
||||
});
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.NetworkAccess,
|
||||
ViolationType = "Test3",
|
||||
Message = "Error 1",
|
||||
Severity = DeterminismViolationSeverity.Error
|
||||
});
|
||||
|
||||
var result = scope.Complete();
|
||||
|
||||
result.Violations.Should().HaveCount(3);
|
||||
result.CountBySeverity[DeterminismViolationSeverity.Warning].Should().Be(2);
|
||||
result.CountBySeverity[DeterminismViolationSeverity.Error].Should().Be(1);
|
||||
result.AnalysisDurationMs.Should().BeGreaterThanOrEqualTo(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Scope_ScopeId_IsPreserved()
|
||||
{
|
||||
var guard = new DeterminismGuardService();
|
||||
using var scope = guard.CreateScope("my-scope-id", DateTimeOffset.UtcNow);
|
||||
|
||||
scope.ScopeId.Should().Be("my-scope-id");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Scope_NullScopeId_ThrowsArgumentNullException()
|
||||
{
|
||||
var guard = new DeterminismGuardService();
|
||||
|
||||
FluentActions.Invoking(() => guard.CreateScope(null!, DateTimeOffset.UtcNow))
|
||||
.Should().Throw<ArgumentNullException>();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region DeterministicTimeProvider Tests
|
||||
|
||||
[Fact]
|
||||
public void DeterministicTimeProvider_MultipleCallsReturnSameValue()
|
||||
{
|
||||
var fixedTime = new DateTimeOffset(2026, 2, 12, 10, 0, 0, TimeSpan.Zero);
|
||||
var provider = new DeterministicTimeProvider(fixedTime);
|
||||
|
||||
// 100 calls should all return the same value
|
||||
for (int i = 0; i < 100; i++)
|
||||
{
|
||||
provider.GetUtcNow().Should().Be(fixedTime);
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region GuardedEvaluationResult Properties
|
||||
|
||||
[Fact]
|
||||
public void GuardedEvaluationResult_ViolationCountBySeverity_Works()
|
||||
{
|
||||
var evaluator = new GuardedPolicyEvaluator(DeterminismGuardOptions.Development);
|
||||
|
||||
var result = evaluator.Evaluate("count-test", DateTimeOffset.UtcNow, scope =>
|
||||
{
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.WallClock,
|
||||
ViolationType = "T1",
|
||||
Message = "W1",
|
||||
Severity = DeterminismViolationSeverity.Warning
|
||||
});
|
||||
scope.ReportViolation(new DeterminismViolation
|
||||
{
|
||||
Category = DeterminismViolationCategory.WallClock,
|
||||
ViolationType = "T2",
|
||||
Message = "E1",
|
||||
Severity = DeterminismViolationSeverity.Error
|
||||
});
|
||||
return "done";
|
||||
});
|
||||
|
||||
result.ViolationCountBySeverity.Should().ContainKey(DeterminismViolationSeverity.Warning);
|
||||
result.ViolationCountBySeverity[DeterminismViolationSeverity.Warning].Should().Be(1);
|
||||
result.ViolationCountBySeverity[DeterminismViolationSeverity.Error].Should().Be(1);
|
||||
result.HasViolations.Should().BeTrue();
|
||||
result.WasBlocked.Should().BeFalse();
|
||||
result.ScopeId.Should().Be("count-test");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Evaluate_UnexpectedException_RecordsAsCriticalViolation()
|
||||
{
|
||||
var evaluator = new GuardedPolicyEvaluator();
|
||||
|
||||
var result = evaluator.Evaluate<string>("exception-test", DateTimeOffset.UtcNow, scope =>
|
||||
{
|
||||
throw new InvalidOperationException("Test exception");
|
||||
});
|
||||
|
||||
result.Succeeded.Should().BeFalse();
|
||||
result.Exception.Should().NotBeNull();
|
||||
result.Exception.Should().BeOfType<InvalidOperationException>();
|
||||
result.BlockingViolation.Should().NotBeNull();
|
||||
result.BlockingViolation!.ViolationType.Should().Be("EvaluationException");
|
||||
result.BlockingViolation.Severity.Should().Be(DeterminismViolationSeverity.Critical);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region DeterminismAnalysisResult.Pass Factory
|
||||
|
||||
[Fact]
|
||||
public void DeterminismAnalysisResult_Pass_CreatesCleanResult()
|
||||
{
|
||||
var result = DeterminismAnalysisResult.Pass(42, true);
|
||||
|
||||
result.Passed.Should().BeTrue();
|
||||
result.Violations.Should().BeEmpty();
|
||||
result.CountBySeverity.Should().BeEmpty();
|
||||
result.AnalysisDurationMs.Should().Be(42);
|
||||
result.EnforcementEnabled.Should().BeTrue();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Violation Remediation Messages
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_ViolationsIncludeRemediation()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var now = DateTime.Now;";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle()
|
||||
.Which.Remediation.Should().NotBeNullOrWhiteSpace();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void AnalyzeSource_FileReadViolation_HasCriticalSeverity()
|
||||
{
|
||||
var analyzer = new ProhibitedPatternAnalyzer();
|
||||
var source = "var text = File.ReadAllText(\"config.json\");";
|
||||
|
||||
var result = analyzer.AnalyzeSource(source, "test.cs", DeterminismGuardOptions.Default);
|
||||
|
||||
result.Violations.Should().ContainSingle(v =>
|
||||
v.Category == DeterminismViolationCategory.FileSystemAccess &&
|
||||
v.Severity == DeterminismViolationSeverity.Critical);
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,626 @@
|
||||
using FluentAssertions;
|
||||
using Microsoft.Extensions.Logging.Abstractions;
|
||||
using Microsoft.Extensions.Options;
|
||||
using StellaOps.Policy.Engine.Gates;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Policy.Engine.Tests.Gates;
|
||||
|
||||
/// <summary>
|
||||
/// Deep verification tests for CVE-aware release policy gates covering
|
||||
/// VexTrust integration in PolicyGateEvaluator, Contested lattice suggestions,
|
||||
/// RU lattice with justification, DriftGateEvaluator (KEV, EPSS, CVSS, custom),
|
||||
/// and StabilityDampingGate (hysteresis, upgrade bypass, pruning).
|
||||
/// </summary>
|
||||
public sealed class CveAwareReleasePolicyGatesDeepTests
|
||||
{
|
||||
#region PolicyGateEvaluator with VexTrust enabled
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_VexTrustEnabled_LowScore_Blocks()
|
||||
{
|
||||
var options = CreatePolicyGateOptions(vexTrustEnabled: true);
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU", uncertaintyTier: "T4");
|
||||
request = request with
|
||||
{
|
||||
VexTrustScore = 0.30m, // Below default threshold
|
||||
VexSignatureVerified = true,
|
||||
Environment = "production"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("VexTrust");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_VexTrustEnabled_HighScore_Allows()
|
||||
{
|
||||
var options = CreatePolicyGateOptions(vexTrustEnabled: true);
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU", uncertaintyTier: "T4");
|
||||
request = request with
|
||||
{
|
||||
VexTrustScore = 0.90m,
|
||||
VexSignatureVerified = true,
|
||||
Environment = "production"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Allow);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_VexTrustEnabled_UnverifiedSignature_Blocks()
|
||||
{
|
||||
var options = CreatePolicyGateOptions(vexTrustEnabled: true);
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU", uncertaintyTier: "T4");
|
||||
request = request with
|
||||
{
|
||||
VexTrustScore = 0.95m,
|
||||
VexSignatureVerified = false, // Production requires verification
|
||||
Environment = "production"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("VexTrust");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_VexTrustEnabled_MissingScore_Warns()
|
||||
{
|
||||
var options = CreatePolicyGateOptions(vexTrustEnabled: true);
|
||||
// Default MissingTrustBehavior is Warn in PolicyGateOptions
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU", uncertaintyTier: "T4");
|
||||
request = request with
|
||||
{
|
||||
VexTrustScore = null,
|
||||
Environment = "production"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
// Missing trust data should warn (not block) since the gate evaluates before uncertainty
|
||||
decision.Decision.Should().BeOneOf(PolicyGateDecisionType.Warn, PolicyGateDecisionType.Block);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Contested Lattice State Suggestions
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_ContestedLattice_SuggestsTriageResolution()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "X", uncertaintyTier: "T4");
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("LatticeState");
|
||||
decision.Suggestion.Should().Contain("triage");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_CRLattice_SuggestsSubmitEvidence()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CR", uncertaintyTier: "T4");
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
(decision.Suggestion!.Contains("runtime probe evidence") || decision.Suggestion.Contains("unreachability")).Should().BeTrue();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region RU Lattice with Justification
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_RULattice_WithJustification_AllowsWithWarning()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "RU",
|
||||
justification: "Verified dead code via manual analysis of runtime traces");
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
// RU with justification should pass the lattice gate (PassWithNote -> Warn)
|
||||
decision.Decision.Should().BeOneOf(PolicyGateDecisionType.Warn, PolicyGateDecisionType.Allow);
|
||||
decision.BlockedBy.Should().NotBe("LatticeState");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_RULattice_WithoutJustification_Blocks()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "RU");
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("LatticeState");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Fixed and UnderInvestigation Status Paths
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_Fixed_AllowsWithAnyLatticeState()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
foreach (var state in new[] { "U", "SR", "SU", "RO", "RU", "CR", "CU", "X" })
|
||||
{
|
||||
var request = CreateGateRequest("fixed", latticeState: state);
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Allow,
|
||||
$"Fixed status should be allowed with lattice state {state}");
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_UnderInvestigation_NoEvidenceRequired()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("under_investigation", latticeState: "U",
|
||||
graphHash: null, pathLength: null);
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Allow);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Override with Justification
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_Override_WithValidJustification_BypassesBlock()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "SR");
|
||||
request = request with
|
||||
{
|
||||
AllowOverride = true,
|
||||
OverrideJustification = "Manual review confirmed dead code path in production environment"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Warn);
|
||||
decision.Advisory.Should().Contain("Override accepted");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_Override_WithShortJustification_DoesNotBypass()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "SR");
|
||||
request = request with
|
||||
{
|
||||
AllowOverride = true,
|
||||
OverrideJustification = "short" // < 20 chars
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Gate Short-Circuit Behavior
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_EvidenceBlock_ShortCircuitsBeforeLattice()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU",
|
||||
uncertaintyTier: "T4", graphHash: null); // Missing graph hash blocks
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(PolicyGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("EvidenceCompleteness");
|
||||
// LatticeState gate should NOT appear in gate results since it short-circuited
|
||||
decision.Gates.Should().HaveCount(1);
|
||||
decision.Gates[0].Name.Should().Be("EvidenceCompleteness");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Determinism
|
||||
|
||||
[Fact]
|
||||
public async Task PolicyGate_100Iterations_DeterministicDecision()
|
||||
{
|
||||
var options = CreatePolicyGateOptions();
|
||||
var evaluator = CreateEvaluator(options);
|
||||
|
||||
var request = CreateGateRequest("not_affected", latticeState: "CU", uncertaintyTier: "T4");
|
||||
var reference = await evaluator.EvaluateAsync(request);
|
||||
|
||||
for (int i = 0; i < 100; i++)
|
||||
{
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
decision.Decision.Should().Be(reference.Decision);
|
||||
decision.BlockedBy.Should().Be(reference.BlockedBy);
|
||||
decision.Gates.Length.Should().Be(reference.Gates.Length);
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region DriftGateEvaluator Tests
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_KevReachable_Blocks()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(blockOnKev: true);
|
||||
var request = CreateDriftRequest(hasKev: true, deltaReachable: 1);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("KevReachable");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_KevButNoNewReachable_Passes()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(blockOnKev: true);
|
||||
var request = CreateDriftRequest(hasKev: true, deltaReachable: 0);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Allow);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_HighCvss_Blocks()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(cvssThreshold: 9.0);
|
||||
var request = CreateDriftRequest(maxCvss: 9.5, deltaReachable: 2);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("CvssThreshold");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_HighEpss_Blocks()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(epssThreshold: 0.5);
|
||||
var request = CreateDriftRequest(maxEpss: 0.75, deltaReachable: 1);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("EpssThreshold");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_AffectedReachable_Blocks()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(blockOnAffectedReachable: true);
|
||||
var request = CreateDriftRequest(deltaReachable: 3,
|
||||
vexStatuses: new[] { "affected" });
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Block);
|
||||
decision.BlockedBy.Should().Be("AffectedReachable");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_NoMaterialDrift_Allows()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(blockOnKev: true, cvssThreshold: 7.0);
|
||||
var request = CreateDriftRequest(hasMaterialDrift: false);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Allow);
|
||||
decision.Advisory.Should().Contain("No material drift");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_Disabled_AllowsEverything()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(enabled: false, blockOnKev: true);
|
||||
var request = CreateDriftRequest(hasKev: true, deltaReachable: 5);
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Allow);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task DriftGate_Override_BypassesBlock()
|
||||
{
|
||||
var evaluator = CreateDriftGateEvaluator(blockOnKev: true);
|
||||
var request = CreateDriftRequest(hasKev: true, deltaReachable: 1);
|
||||
request = request with
|
||||
{
|
||||
AllowOverride = true,
|
||||
OverrideJustification = "Accepted risk per security review #SR-2025-042"
|
||||
};
|
||||
|
||||
var decision = await evaluator.EvaluateAsync(request);
|
||||
|
||||
decision.Decision.Should().Be(DriftGateDecisionType.Warn);
|
||||
decision.Advisory.Should().Contain("Override accepted");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region StabilityDampingGate Tests
|
||||
|
||||
[Fact]
|
||||
public async Task StabilityDamping_FirstVerdict_Surfaces()
|
||||
{
|
||||
var gate = CreateStabilityDampingGate();
|
||||
var request = new StabilityDampingRequest
|
||||
{
|
||||
Key = "artifact:CVE-2025-001",
|
||||
ProposedState = new VerdictState
|
||||
{
|
||||
Status = "affected",
|
||||
Confidence = 0.85,
|
||||
Timestamp = DateTimeOffset.UtcNow
|
||||
}
|
||||
};
|
||||
|
||||
var decision = await gate.EvaluateAsync(request);
|
||||
|
||||
decision.ShouldSurface.Should().BeTrue();
|
||||
decision.Reason.Should().Contain("new verdict");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task StabilityDamping_SameStatus_SmallDelta_Suppressed()
|
||||
{
|
||||
var gate = CreateStabilityDampingGate();
|
||||
var key = "artifact:CVE-2025-002";
|
||||
var now = DateTimeOffset.UtcNow;
|
||||
|
||||
// Record initial state
|
||||
await gate.RecordStateAsync(key, new VerdictState
|
||||
{
|
||||
Status = "affected",
|
||||
Confidence = 0.80,
|
||||
Timestamp = now
|
||||
});
|
||||
|
||||
// Propose same status with small confidence change
|
||||
var request = new StabilityDampingRequest
|
||||
{
|
||||
Key = key,
|
||||
ProposedState = new VerdictState
|
||||
{
|
||||
Status = "affected",
|
||||
Confidence = 0.82, // Small delta < threshold
|
||||
Timestamp = now.AddMinutes(5)
|
||||
}
|
||||
};
|
||||
|
||||
var decision = await gate.EvaluateAsync(request);
|
||||
|
||||
decision.ShouldSurface.Should().BeFalse();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task StabilityDamping_Disabled_AlwaysSurfaces()
|
||||
{
|
||||
var gate = CreateStabilityDampingGate(enabled: false);
|
||||
var request = new StabilityDampingRequest
|
||||
{
|
||||
Key = "test:key",
|
||||
ProposedState = new VerdictState
|
||||
{
|
||||
Status = "affected",
|
||||
Confidence = 0.5,
|
||||
Timestamp = DateTimeOffset.UtcNow
|
||||
}
|
||||
};
|
||||
|
||||
var decision = await gate.EvaluateAsync(request);
|
||||
|
||||
decision.ShouldSurface.Should().BeTrue();
|
||||
decision.Reason.Should().Contain("disabled");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task StabilityDamping_PruneHistory_RemovesOldRecords()
|
||||
{
|
||||
var gate = CreateStabilityDampingGate();
|
||||
|
||||
// Record old state
|
||||
await gate.RecordStateAsync("old:key", new VerdictState
|
||||
{
|
||||
Status = "affected",
|
||||
Confidence = 0.8,
|
||||
Timestamp = DateTimeOffset.UtcNow.AddDays(-60) // Very old
|
||||
});
|
||||
|
||||
var pruned = await gate.PruneHistoryAsync();
|
||||
|
||||
pruned.Should().BeGreaterThanOrEqualTo(0); // Depends on retention config
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Helpers
|
||||
|
||||
private static PolicyGateEvaluator CreateEvaluator(PolicyGateOptions options)
|
||||
{
|
||||
return new PolicyGateEvaluator(
|
||||
new TestOptionsMonitor<PolicyGateOptions>(options),
|
||||
TimeProvider.System,
|
||||
NullLogger<PolicyGateEvaluator>.Instance);
|
||||
}
|
||||
|
||||
private static PolicyGateOptions CreatePolicyGateOptions(bool vexTrustEnabled = false)
|
||||
{
|
||||
var options = new PolicyGateOptions();
|
||||
options.VexTrust.Enabled = vexTrustEnabled;
|
||||
if (vexTrustEnabled)
|
||||
{
|
||||
options.VexTrust.ApplyToStatuses = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "not_affected", "fixed" };
|
||||
options.VexTrust.MissingTrustBehavior = MissingTrustBehavior.Warn;
|
||||
options.VexTrust.Thresholds["production"] = new VexTrustThresholds
|
||||
{
|
||||
MinCompositeScore = 0.80m,
|
||||
RequireIssuerVerified = true,
|
||||
AcceptableFreshness = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "fresh" },
|
||||
FailureAction = FailureAction.Block
|
||||
};
|
||||
options.VexTrust.Thresholds["default"] = new VexTrustThresholds
|
||||
{
|
||||
MinCompositeScore = 0.60m,
|
||||
RequireIssuerVerified = false,
|
||||
AcceptableFreshness = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "fresh", "stale" },
|
||||
FailureAction = FailureAction.Warn
|
||||
};
|
||||
}
|
||||
return options;
|
||||
}
|
||||
|
||||
private static PolicyGateRequest CreateGateRequest(
|
||||
string status,
|
||||
string? latticeState = null,
|
||||
string? uncertaintyTier = null,
|
||||
string? graphHash = "blake3:abc123",
|
||||
int? pathLength = -1,
|
||||
bool hasRuntimeEvidence = false,
|
||||
string? justification = null)
|
||||
{
|
||||
return new PolicyGateRequest
|
||||
{
|
||||
TenantId = "tenant-1",
|
||||
VulnId = "CVE-2025-12345",
|
||||
Purl = "pkg:maven/com.example/foo@1.0.0",
|
||||
RequestedStatus = status,
|
||||
LatticeState = latticeState,
|
||||
UncertaintyTier = uncertaintyTier,
|
||||
GraphHash = graphHash,
|
||||
PathLength = pathLength,
|
||||
HasRuntimeEvidence = hasRuntimeEvidence,
|
||||
Justification = justification,
|
||||
Confidence = 0.95,
|
||||
RiskScore = 0.3
|
||||
};
|
||||
}
|
||||
|
||||
private static DriftGateEvaluator CreateDriftGateEvaluator(
|
||||
bool enabled = true,
|
||||
bool blockOnKev = false,
|
||||
bool blockOnAffectedReachable = false,
|
||||
double? cvssThreshold = null,
|
||||
double? epssThreshold = null)
|
||||
{
|
||||
var options = new DriftGateOptions
|
||||
{
|
||||
Enabled = enabled,
|
||||
BlockOnKev = blockOnKev,
|
||||
BlockOnAffectedReachable = blockOnAffectedReachable,
|
||||
CvssBlockThreshold = cvssThreshold,
|
||||
EpssBlockThreshold = epssThreshold
|
||||
};
|
||||
|
||||
return new DriftGateEvaluator(
|
||||
new TestOptionsMonitor<DriftGateOptions>(options),
|
||||
TimeProvider.System,
|
||||
new TestGuidProvider(),
|
||||
NullLogger<DriftGateEvaluator>.Instance);
|
||||
}
|
||||
|
||||
private static DriftGateRequest CreateDriftRequest(
|
||||
bool hasMaterialDrift = true,
|
||||
bool hasKev = false,
|
||||
int deltaReachable = 0,
|
||||
double? maxCvss = null,
|
||||
double? maxEpss = null,
|
||||
string[]? vexStatuses = null)
|
||||
{
|
||||
// HasMaterialDrift is computed: DeltaReachable > 0 || DeltaUnreachable > 0
|
||||
// When hasMaterialDrift=false, ensure both are 0
|
||||
// When hasMaterialDrift=true but deltaReachable=0, use DeltaUnreachable=1 to trigger material drift
|
||||
var deltaUnreachable = (!hasMaterialDrift || deltaReachable > 0) ? 0 : 1;
|
||||
var effectiveDeltaReachable = hasMaterialDrift ? deltaReachable : 0;
|
||||
|
||||
return new DriftGateRequest
|
||||
{
|
||||
Context = new DriftGateContext
|
||||
{
|
||||
HasKevReachable = hasKev,
|
||||
DeltaReachable = effectiveDeltaReachable,
|
||||
DeltaUnreachable = deltaUnreachable,
|
||||
MaxCvss = maxCvss,
|
||||
MaxEpss = maxEpss,
|
||||
NewlyReachableVexStatuses = vexStatuses ?? Array.Empty<string>()
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
private static StabilityDampingGate CreateStabilityDampingGate(bool enabled = true)
|
||||
{
|
||||
var options = new StabilityDampingOptions
|
||||
{
|
||||
Enabled = enabled,
|
||||
MinDurationBeforeChange = TimeSpan.FromHours(24),
|
||||
MinConfidenceDeltaPercent = 0.10,
|
||||
OnlyDampDowngrades = false,
|
||||
DampedStatuses = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "affected", "not_affected" },
|
||||
HistoryRetention = TimeSpan.FromDays(30)
|
||||
};
|
||||
|
||||
return new StabilityDampingGate(
|
||||
new TestOptionsMonitor<StabilityDampingOptions>(options),
|
||||
TimeProvider.System,
|
||||
NullLogger<StabilityDampingGate>.Instance);
|
||||
}
|
||||
|
||||
private sealed class TestOptionsMonitor<T> : IOptionsMonitor<T>
|
||||
{
|
||||
private readonly T _value;
|
||||
public TestOptionsMonitor(T value) => _value = value;
|
||||
public T CurrentValue => _value;
|
||||
public T Get(string? name) => _value;
|
||||
public IDisposable? OnChange(Action<T, string?> listener) => null;
|
||||
}
|
||||
|
||||
private sealed class TestGuidProvider : StellaOps.Determinism.IGuidProvider
|
||||
{
|
||||
public Guid NewGuid() => new("11111111-2222-3333-4444-555555555555");
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,508 @@
|
||||
using FluentAssertions;
|
||||
using StellaOps.Policy.Scoring;
|
||||
using StellaOps.Policy.Scoring.Engine;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Policy.Scoring.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Deep verification tests for CVSS v4.0 scoring engine covering MacroVector lookup,
|
||||
/// threat multiplier values, environmental requirements math, effective score priority,
|
||||
/// RoundUp behavior, receipt models, and vector interop conversion.
|
||||
/// </summary>
|
||||
public sealed class CvssV4DeepVerificationTests
|
||||
{
|
||||
private readonly ICvssV4Engine _engine = new CvssV4Engine();
|
||||
|
||||
#region MacroVectorLookup Table Completeness
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_HasAll729Entries()
|
||||
{
|
||||
// EQ ranges: EQ1:0-2, EQ2:0-2, EQ3:0-2, EQ4:0-2, EQ5:0-2, EQ6:0-2
|
||||
// Total: 3^6 = 729
|
||||
MacroVectorLookup.EntryCount.Should().Be(729);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_HighestVector000000_Returns10()
|
||||
{
|
||||
MacroVectorLookup.GetBaseScore("000000").Should().Be(10.0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_LowestVector222222_Returns0()
|
||||
{
|
||||
MacroVectorLookup.GetBaseScore("222222").Should().Be(0.0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_AllScoresInRange0To10()
|
||||
{
|
||||
for (int eq1 = 0; eq1 <= 2; eq1++)
|
||||
for (int eq2 = 0; eq2 <= 2; eq2++)
|
||||
for (int eq3 = 0; eq3 <= 2; eq3++)
|
||||
for (int eq4 = 0; eq4 <= 2; eq4++)
|
||||
for (int eq5 = 0; eq5 <= 2; eq5++)
|
||||
for (int eq6 = 0; eq6 <= 2; eq6++)
|
||||
{
|
||||
var mv = $"{eq1}{eq2}{eq3}{eq4}{eq5}{eq6}";
|
||||
var score = MacroVectorLookup.GetBaseScore(mv);
|
||||
score.Should().BeInRange(0.0, 10.0, $"MacroVector {mv} score out of range");
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_AllEntriesHavePreciseScores()
|
||||
{
|
||||
for (int eq1 = 0; eq1 <= 2; eq1++)
|
||||
for (int eq2 = 0; eq2 <= 2; eq2++)
|
||||
for (int eq3 = 0; eq3 <= 2; eq3++)
|
||||
for (int eq4 = 0; eq4 <= 2; eq4++)
|
||||
for (int eq5 = 0; eq5 <= 2; eq5++)
|
||||
for (int eq6 = 0; eq6 <= 2; eq6++)
|
||||
{
|
||||
var mv = $"{eq1}{eq2}{eq3}{eq4}{eq5}{eq6}";
|
||||
MacroVectorLookup.HasPreciseScore(mv).Should().BeTrue(
|
||||
$"MacroVector {mv} missing from lookup table");
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MacroVectorLookup_InvalidLength_ReturnsZero()
|
||||
{
|
||||
MacroVectorLookup.GetBaseScore("12345").Should().Be(0.0);
|
||||
MacroVectorLookup.GetBaseScore("1234567").Should().Be(0.0);
|
||||
MacroVectorLookup.GetBaseScore("").Should().Be(0.0);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Threat Multiplier Exact Values
|
||||
|
||||
[Theory]
|
||||
[InlineData(ExploitMaturity.Attacked, 10.0)] // 1.0 multiplier * 10.0 base
|
||||
[InlineData(ExploitMaturity.ProofOfConcept, 9.4)] // 0.94 * 10.0 = 9.4
|
||||
[InlineData(ExploitMaturity.Unreported, 9.1)] // 0.91 * 10.0 = 9.1
|
||||
public void ThreatMultiplier_ExactValues_MatchSpecification(
|
||||
ExploitMaturity maturity, double expectedScore)
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var threatMetrics = new CvssThreatMetrics { ExploitMaturity = maturity };
|
||||
|
||||
var scores = _engine.ComputeScores(baseMetrics, threatMetrics);
|
||||
|
||||
scores.ThreatScore.Should().NotBeNull();
|
||||
scores.ThreatScore!.Value.Should().Be(expectedScore);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Environmental Requirements Multiplier Math
|
||||
|
||||
[Fact]
|
||||
public void EnvironmentalScore_AllHighRequirements_MultipliesBy1_5()
|
||||
{
|
||||
// All High = (1.5 + 1.5 + 1.5) / 3 = 1.5 multiplier
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.High,
|
||||
IntegrityRequirement = SecurityRequirement.High,
|
||||
AvailabilityRequirement = SecurityRequirement.High
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeGreaterThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EnvironmentalScore_AllLowRequirements_MultipliesBy0_5()
|
||||
{
|
||||
// All Low = (0.5 + 0.5 + 0.5) / 3 = 0.5 multiplier
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.Low,
|
||||
IntegrityRequirement = SecurityRequirement.Low,
|
||||
AvailabilityRequirement = SecurityRequirement.Low
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EnvironmentalScore_MixedRequirements_AveragesMultipliers()
|
||||
{
|
||||
// High + Medium + Low = (1.5 + 1.0 + 0.5) / 3 = 1.0
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.High,
|
||||
IntegrityRequirement = SecurityRequirement.Medium,
|
||||
AvailabilityRequirement = SecurityRequirement.Low
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
// Multiplier = 1.0, so environmental score should be close to base
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should()
|
||||
.BeApproximately(baseScores.BaseScore, 0.5);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EnvironmentalScore_CappedAt10()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.High,
|
||||
IntegrityRequirement = SecurityRequirement.High,
|
||||
AvailabilityRequirement = SecurityRequirement.High
|
||||
};
|
||||
|
||||
var scores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
scores.EnvironmentalScore.Should().NotBeNull();
|
||||
scores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(10.0);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Effective Score Priority
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScore_BaseOnly_SelectsBase()
|
||||
{
|
||||
var scores = _engine.ComputeScores(CreateMaxMetrics());
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Base);
|
||||
scores.EffectiveScore.Should().Be(scores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScore_WithThreat_SelectsThreat()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.Attacked });
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Threat);
|
||||
scores.EffectiveScore.Should().Be(scores.ThreatScore!.Value);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScore_WithEnvironmental_SelectsEnvironmental()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
environmentalMetrics: new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.High
|
||||
});
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Environmental);
|
||||
scores.EffectiveScore.Should().Be(scores.EnvironmentalScore!.Value);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScore_WithAll_SelectsFull()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.Attacked },
|
||||
new CvssEnvironmentalMetrics { ConfidentialityRequirement = SecurityRequirement.High });
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Full);
|
||||
scores.EffectiveScore.Should().Be(scores.FullScore!.Value);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Vector Roundtrip with Environmental and Threat
|
||||
|
||||
[Fact]
|
||||
public void VectorRoundtrip_WithEnvironmentalMetrics_PreservesAll()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ConfidentialityRequirement = SecurityRequirement.High,
|
||||
IntegrityRequirement = SecurityRequirement.Medium,
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local
|
||||
};
|
||||
|
||||
var vector = _engine.BuildVectorString(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
vector.Should().Contain("CR:H");
|
||||
vector.Should().Contain("IR:M");
|
||||
vector.Should().Contain("MAV:L");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void VectorRoundtrip_WithSupplementalMetrics_IncludesAll()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var suppMetrics = new CvssSupplementalMetrics
|
||||
{
|
||||
Safety = Safety.Present,
|
||||
Automatable = Automatable.Yes,
|
||||
Recovery = Recovery.Irrecoverable,
|
||||
ValueDensity = ValueDensity.Concentrated,
|
||||
VulnerabilityResponseEffort = ResponseEffort.High,
|
||||
ProviderUrgency = ProviderUrgency.Red
|
||||
};
|
||||
|
||||
var vector = _engine.BuildVectorString(baseMetrics, supplementalMetrics: suppMetrics);
|
||||
|
||||
vector.Should().Contain("S:P");
|
||||
vector.Should().Contain("AU:Y");
|
||||
vector.Should().Contain("R:I");
|
||||
vector.Should().Contain("V:C");
|
||||
vector.Should().Contain("RE:H");
|
||||
vector.Should().Contain("U:Red");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ParseVector_WithEnvironmentalMetrics_ParsesCorrectly()
|
||||
{
|
||||
var vector = "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/CR:H/MAV:L";
|
||||
|
||||
var result = _engine.ParseVector(vector);
|
||||
|
||||
result.EnvironmentalMetrics.Should().NotBeNull();
|
||||
result.EnvironmentalMetrics!.ConfidentialityRequirement.Should().Be(SecurityRequirement.High);
|
||||
result.EnvironmentalMetrics.ModifiedAttackVector.Should().Be(ModifiedAttackVector.Local);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region CvssEngineFactory Version Detection Edge Cases
|
||||
|
||||
[Fact]
|
||||
public void CvssEngineFactory_DetectsV4ByAtMetric()
|
||||
{
|
||||
var factory = new CvssEngineFactory();
|
||||
// No prefix but has AT: which is unique to v4.0
|
||||
factory.DetectVersion("AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H")
|
||||
.Should().Be(CvssVersion.V4_0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssEngineFactory_ComputeFromVector_V4_ProducesCorrectVersion()
|
||||
{
|
||||
var factory = new CvssEngineFactory();
|
||||
var result = factory.ComputeFromVector(
|
||||
"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
|
||||
|
||||
result.Version.Should().Be(CvssVersion.V4_0);
|
||||
result.BaseScore.Should().Be(10.0);
|
||||
result.Severity.Should().Be("Critical");
|
||||
result.VectorString.Should().StartWith("CVSS:4.0/");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region CvssVectorInterop Conversion
|
||||
|
||||
[Fact]
|
||||
public void CvssVectorInterop_ConvertV31ToV4_MapsAllBaseMetrics()
|
||||
{
|
||||
var v31 = "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H";
|
||||
|
||||
var v4 = CvssVectorInterop.ConvertV31ToV4(v31);
|
||||
|
||||
v4.Should().StartWith("CVSS:4.0/");
|
||||
v4.Should().Contain("AV:N");
|
||||
v4.Should().Contain("AC:L");
|
||||
v4.Should().Contain("PR:N");
|
||||
v4.Should().Contain("UI:N");
|
||||
v4.Should().Contain("VC:H");
|
||||
v4.Should().Contain("VI:H");
|
||||
v4.Should().Contain("VA:H");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssVectorInterop_ConvertV31ToV4_NullOrEmpty_Throws()
|
||||
{
|
||||
FluentActions.Invoking(() => CvssVectorInterop.ConvertV31ToV4(null!))
|
||||
.Should().Throw<ArgumentException>();
|
||||
FluentActions.Invoking(() => CvssVectorInterop.ConvertV31ToV4(""))
|
||||
.Should().Throw<ArgumentException>();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssVectorInterop_ConvertV31ToV4_IsDeterministic()
|
||||
{
|
||||
var v31 = "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N";
|
||||
|
||||
var result1 = CvssVectorInterop.ConvertV31ToV4(v31);
|
||||
var result2 = CvssVectorInterop.ConvertV31ToV4(v31);
|
||||
|
||||
result1.Should().Be(result2);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Receipt Model Structure
|
||||
|
||||
[Fact]
|
||||
public void CvssScoreReceipt_HasRequiredProperties()
|
||||
{
|
||||
var receipt = new CvssScoreReceipt
|
||||
{
|
||||
ReceiptId = "R-001",
|
||||
VulnerabilityId = "CVE-2025-0001",
|
||||
TenantId = "tenant-1",
|
||||
CreatedAt = DateTimeOffset.UtcNow,
|
||||
CreatedBy = "system",
|
||||
BaseMetrics = CreateMaxMetrics(),
|
||||
Scores = new CvssScores
|
||||
{
|
||||
BaseScore = 10.0,
|
||||
EffectiveScore = 10.0,
|
||||
EffectiveScoreType = EffectiveScoreType.Base
|
||||
},
|
||||
VectorString = "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
|
||||
Severity = CvssSeverity.Critical,
|
||||
PolicyRef = new CvssPolicyReference
|
||||
{
|
||||
PolicyId = "policy-1",
|
||||
Version = "1.0.0",
|
||||
Hash = "sha256:abc"
|
||||
},
|
||||
InputHash = "sha256:inputhash"
|
||||
};
|
||||
|
||||
receipt.SchemaVersion.Should().Be("1.0.0");
|
||||
receipt.Format.Should().Be("stella.ops/cvssReceipt@v1");
|
||||
receipt.CvssVersion.Should().Be("4.0");
|
||||
receipt.IsActive.Should().BeTrue();
|
||||
receipt.Evidence.Should().BeEmpty();
|
||||
receipt.AttestationRefs.Should().BeEmpty();
|
||||
receipt.History.Should().BeEmpty();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssPolicy_DefaultValues_AreCorrect()
|
||||
{
|
||||
var policy = new CvssPolicy
|
||||
{
|
||||
PolicyId = "test",
|
||||
Version = "1.0.0",
|
||||
Name = "Test Policy",
|
||||
EffectiveFrom = DateTimeOffset.UtcNow
|
||||
};
|
||||
|
||||
policy.DefaultEffectiveScoreType.Should().Be(EffectiveScoreType.Full);
|
||||
policy.IsActive.Should().BeTrue();
|
||||
policy.MetricOverrides.Should().BeEmpty();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssSeverityThresholds_DefaultValues_MatchFirstSpec()
|
||||
{
|
||||
var thresholds = new CvssSeverityThresholds();
|
||||
|
||||
thresholds.LowMin.Should().Be(0.1);
|
||||
thresholds.MediumMin.Should().Be(4.0);
|
||||
thresholds.HighMin.Should().Be(7.0);
|
||||
thresholds.CriticalMin.Should().Be(9.0);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Null Validation
|
||||
|
||||
[Fact]
|
||||
public void ComputeScores_NullBaseMetrics_ThrowsArgumentNullException()
|
||||
{
|
||||
FluentActions.Invoking(() => _engine.ComputeScores(null!))
|
||||
.Should().Throw<ArgumentNullException>();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void BuildVectorString_NullBaseMetrics_ThrowsArgumentNullException()
|
||||
{
|
||||
FluentActions.Invoking(() => _engine.BuildVectorString(null!))
|
||||
.Should().Throw<ArgumentNullException>();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ParseVector_NullOrEmpty_ThrowsArgumentException()
|
||||
{
|
||||
FluentActions.Invoking(() => _engine.ParseVector(null!))
|
||||
.Should().Throw<ArgumentException>();
|
||||
FluentActions.Invoking(() => _engine.ParseVector(""))
|
||||
.Should().Throw<ArgumentException>();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Determinism (100-iteration)
|
||||
|
||||
[Fact]
|
||||
public void ComputeScores_100Iterations_DeterministicOutput()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var threat = new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.ProofOfConcept };
|
||||
var env = new CvssEnvironmentalMetrics { ConfidentialityRequirement = SecurityRequirement.High };
|
||||
|
||||
var reference = _engine.ComputeScores(baseMetrics, threat, env);
|
||||
|
||||
for (int i = 0; i < 100; i++)
|
||||
{
|
||||
var scores = _engine.ComputeScores(baseMetrics, threat, env);
|
||||
scores.BaseScore.Should().Be(reference.BaseScore);
|
||||
scores.ThreatScore.Should().Be(reference.ThreatScore);
|
||||
scores.EnvironmentalScore.Should().Be(reference.EnvironmentalScore);
|
||||
scores.FullScore.Should().Be(reference.FullScore);
|
||||
scores.EffectiveScore.Should().Be(reference.EffectiveScore);
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Helper Methods
|
||||
|
||||
private static CvssBaseMetrics CreateMaxMetrics() => new()
|
||||
{
|
||||
AttackVector = AttackVector.Network,
|
||||
AttackComplexity = AttackComplexity.Low,
|
||||
AttackRequirements = AttackRequirements.None,
|
||||
PrivilegesRequired = PrivilegesRequired.None,
|
||||
UserInteraction = UserInteraction.None,
|
||||
VulnerableSystemConfidentiality = ImpactMetricValue.High,
|
||||
VulnerableSystemIntegrity = ImpactMetricValue.High,
|
||||
VulnerableSystemAvailability = ImpactMetricValue.High,
|
||||
SubsequentSystemConfidentiality = ImpactMetricValue.High,
|
||||
SubsequentSystemIntegrity = ImpactMetricValue.High,
|
||||
SubsequentSystemAvailability = ImpactMetricValue.High
|
||||
};
|
||||
|
||||
private static CvssBaseMetrics CreateMediumMetrics() => new()
|
||||
{
|
||||
AttackVector = AttackVector.Network,
|
||||
AttackComplexity = AttackComplexity.Low,
|
||||
AttackRequirements = AttackRequirements.None,
|
||||
PrivilegesRequired = PrivilegesRequired.Low,
|
||||
UserInteraction = UserInteraction.None,
|
||||
VulnerableSystemConfidentiality = ImpactMetricValue.Low,
|
||||
VulnerableSystemIntegrity = ImpactMetricValue.Low,
|
||||
VulnerableSystemAvailability = ImpactMetricValue.None,
|
||||
SubsequentSystemConfidentiality = ImpactMetricValue.None,
|
||||
SubsequentSystemIntegrity = ImpactMetricValue.None,
|
||||
SubsequentSystemAvailability = ImpactMetricValue.None
|
||||
};
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,406 @@
|
||||
using FluentAssertions;
|
||||
using StellaOps.Policy.Scoring;
|
||||
using StellaOps.Policy.Scoring.Engine;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Policy.Scoring.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Deep verification tests for CVSS v4.0 environmental metrics completion.
|
||||
/// Covers Modified Attack/Impact metrics (MAV, MAC, MAT, MPR, MUI, MVC, MVI, MVA, MSC, MSI, MSA),
|
||||
/// effective score type selection, receipt determinism, and NotDefined defaults.
|
||||
/// </summary>
|
||||
public sealed class CvssV4EnvironmentalDeepVerificationTests
|
||||
{
|
||||
private readonly ICvssV4Engine _engine = new CvssV4Engine();
|
||||
|
||||
#region Modified Attack Metrics Lower Score
|
||||
|
||||
[Fact]
|
||||
public void MAV_NetworkToLocal_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MAC_LowToHigh_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackComplexity = ModifiedAttackComplexity.High
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MAT_NoneToPresent_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackRequirements = ModifiedAttackRequirements.Present
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MPR_NoneToHigh_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedPrivilegesRequired = ModifiedPrivilegesRequired.High
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MUI_NoneToActive_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedUserInteraction = ModifiedUserInteraction.Active
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThan(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Modified Impact Metrics
|
||||
|
||||
[Fact]
|
||||
public void MVC_HighToNone_LowersEnvironmentalScore()
|
||||
{
|
||||
// Use medium base to avoid MacroVector saturation at 10.0
|
||||
var baseMetrics = CreateMediumMetrics() with
|
||||
{
|
||||
VulnerableSystemConfidentiality = ImpactMetricValue.High
|
||||
};
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedVulnerableSystemConfidentiality = ModifiedImpactMetricValue.None
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MVI_HighToLow_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics() with
|
||||
{
|
||||
VulnerableSystemIntegrity = ImpactMetricValue.High
|
||||
};
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedVulnerableSystemIntegrity = ModifiedImpactMetricValue.Low
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MVA_HighToNone_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics() with
|
||||
{
|
||||
VulnerableSystemAvailability = ImpactMetricValue.High
|
||||
};
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedVulnerableSystemAvailability = ModifiedImpactMetricValue.None
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Modified Subsequent Impact Metrics
|
||||
|
||||
[Fact]
|
||||
public void MSC_HighToNone_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics() with
|
||||
{
|
||||
SubsequentSystemConfidentiality = ImpactMetricValue.High
|
||||
};
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedSubsequentSystemConfidentiality = ModifiedImpactMetricValue.None
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MSI_Safety_AppliesMaximumImpact()
|
||||
{
|
||||
// MSI=Safety should result in the highest possible subsequent integrity impact
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedSubsequentSystemIntegrity = ModifiedSubsequentImpact.Safety
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
// Safety should increase the score because it elevates subsequent integrity impact
|
||||
envScores.EnvironmentalScore!.Value.Should().BeGreaterThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MSA_HighToLow_LowersEnvironmentalScore()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics() with
|
||||
{
|
||||
SubsequentSystemAvailability = ImpactMetricValue.High
|
||||
};
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedSubsequentSystemAvailability = ModifiedSubsequentImpact.Low
|
||||
};
|
||||
|
||||
var baseScores = _engine.ComputeScores(baseMetrics);
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
envScores.EnvironmentalScore.Should().NotBeNull();
|
||||
envScores.EnvironmentalScore!.Value.Should().BeLessThanOrEqualTo(baseScores.BaseScore);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region All NotDefined Defaults
|
||||
|
||||
[Fact]
|
||||
public void AllModifiedMetrics_NotDefined_EnvironmentalIsNull()
|
||||
{
|
||||
// When all environmental metrics are NotDefined, the engine correctly
|
||||
// determines there are no meaningful environmental overrides and returns null
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.NotDefined,
|
||||
ModifiedAttackComplexity = ModifiedAttackComplexity.NotDefined,
|
||||
ModifiedAttackRequirements = ModifiedAttackRequirements.NotDefined,
|
||||
ModifiedPrivilegesRequired = ModifiedPrivilegesRequired.NotDefined,
|
||||
ModifiedUserInteraction = ModifiedUserInteraction.NotDefined,
|
||||
ModifiedVulnerableSystemConfidentiality = ModifiedImpactMetricValue.NotDefined,
|
||||
ModifiedVulnerableSystemIntegrity = ModifiedImpactMetricValue.NotDefined,
|
||||
ModifiedVulnerableSystemAvailability = ModifiedImpactMetricValue.NotDefined,
|
||||
ModifiedSubsequentSystemConfidentiality = ModifiedImpactMetricValue.NotDefined,
|
||||
ModifiedSubsequentSystemIntegrity = ModifiedSubsequentImpact.NotDefined,
|
||||
ModifiedSubsequentSystemAvailability = ModifiedSubsequentImpact.NotDefined
|
||||
};
|
||||
|
||||
var envScores = _engine.ComputeScores(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
// All NotDefined means HasEnvironmentalMetrics returns false -> null environmental score
|
||||
envScores.EnvironmentalScore.Should().BeNull();
|
||||
envScores.EffectiveScoreType.Should().Be(EffectiveScoreType.Base);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Effective Score Type Selection
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScoreType_BaseOnly_SelectsBase()
|
||||
{
|
||||
var scores = _engine.ComputeScores(CreateMaxMetrics());
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Base);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScoreType_WithThreatOnly_SelectsThreat()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.Attacked });
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Threat);
|
||||
scores.ThreatScore.Should().NotBeNull();
|
||||
scores.EnvironmentalScore.Should().BeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScoreType_WithEnvOnly_SelectsEnvironmental()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
environmentalMetrics: new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local
|
||||
});
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Environmental);
|
||||
scores.EnvironmentalScore.Should().NotBeNull();
|
||||
scores.ThreatScore.Should().BeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void EffectiveScoreType_BTE_WithAllMetrics_SelectsFull()
|
||||
{
|
||||
var scores = _engine.ComputeScores(
|
||||
CreateMaxMetrics(),
|
||||
new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.Attacked },
|
||||
new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local
|
||||
});
|
||||
|
||||
scores.EffectiveScoreType.Should().Be(EffectiveScoreType.Full);
|
||||
scores.FullScore.Should().NotBeNull();
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Vector String with Environmental Metrics
|
||||
|
||||
[Fact]
|
||||
public void VectorString_ContainsAllModifiedMetrics()
|
||||
{
|
||||
var baseMetrics = CreateMaxMetrics();
|
||||
var envMetrics = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local,
|
||||
ModifiedAttackComplexity = ModifiedAttackComplexity.High,
|
||||
ModifiedPrivilegesRequired = ModifiedPrivilegesRequired.High,
|
||||
ModifiedUserInteraction = ModifiedUserInteraction.Active,
|
||||
ModifiedVulnerableSystemConfidentiality = ModifiedImpactMetricValue.Low,
|
||||
ConfidentialityRequirement = SecurityRequirement.High
|
||||
};
|
||||
|
||||
var vector = _engine.BuildVectorString(baseMetrics, environmentalMetrics: envMetrics);
|
||||
|
||||
vector.Should().Contain("MAV:L");
|
||||
vector.Should().Contain("MAC:H");
|
||||
vector.Should().Contain("MPR:H");
|
||||
vector.Should().Contain("MUI:A");
|
||||
vector.Should().Contain("MVC:L");
|
||||
vector.Should().Contain("CR:H");
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Receipt Determinism
|
||||
|
||||
[Fact]
|
||||
public void Receipt_SameVector_ProducesSameScores()
|
||||
{
|
||||
var baseMetrics = CreateMediumMetrics();
|
||||
var threat = new CvssThreatMetrics { ExploitMaturity = ExploitMaturity.ProofOfConcept };
|
||||
var env = new CvssEnvironmentalMetrics
|
||||
{
|
||||
ModifiedAttackVector = ModifiedAttackVector.Local,
|
||||
ConfidentialityRequirement = SecurityRequirement.High
|
||||
};
|
||||
|
||||
var scores1 = _engine.ComputeScores(baseMetrics, threat, env);
|
||||
var scores2 = _engine.ComputeScores(baseMetrics, threat, env);
|
||||
|
||||
scores1.BaseScore.Should().Be(scores2.BaseScore);
|
||||
scores1.ThreatScore.Should().Be(scores2.ThreatScore);
|
||||
scores1.EnvironmentalScore.Should().Be(scores2.EnvironmentalScore);
|
||||
scores1.FullScore.Should().Be(scores2.FullScore);
|
||||
scores1.EffectiveScore.Should().Be(scores2.EffectiveScore);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CvssEngineFactory_V4Vector_ReturnsCorrectVersion()
|
||||
{
|
||||
var factory = new CvssEngineFactory();
|
||||
var result = factory.ComputeFromVector(
|
||||
"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
|
||||
|
||||
result.Version.Should().Be(CvssVersion.V4_0);
|
||||
result.BaseScore.Should().Be(10.0);
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region Helpers
|
||||
|
||||
private static CvssBaseMetrics CreateMaxMetrics() => new()
|
||||
{
|
||||
AttackVector = AttackVector.Network,
|
||||
AttackComplexity = AttackComplexity.Low,
|
||||
AttackRequirements = AttackRequirements.None,
|
||||
PrivilegesRequired = PrivilegesRequired.None,
|
||||
UserInteraction = UserInteraction.None,
|
||||
VulnerableSystemConfidentiality = ImpactMetricValue.High,
|
||||
VulnerableSystemIntegrity = ImpactMetricValue.High,
|
||||
VulnerableSystemAvailability = ImpactMetricValue.High,
|
||||
SubsequentSystemConfidentiality = ImpactMetricValue.High,
|
||||
SubsequentSystemIntegrity = ImpactMetricValue.High,
|
||||
SubsequentSystemAvailability = ImpactMetricValue.High
|
||||
};
|
||||
|
||||
private static CvssBaseMetrics CreateMediumMetrics() => new()
|
||||
{
|
||||
AttackVector = AttackVector.Network,
|
||||
AttackComplexity = AttackComplexity.Low,
|
||||
AttackRequirements = AttackRequirements.None,
|
||||
PrivilegesRequired = PrivilegesRequired.Low,
|
||||
UserInteraction = UserInteraction.None,
|
||||
VulnerableSystemConfidentiality = ImpactMetricValue.Low,
|
||||
VulnerableSystemIntegrity = ImpactMetricValue.Low,
|
||||
VulnerableSystemAvailability = ImpactMetricValue.None,
|
||||
SubsequentSystemConfidentiality = ImpactMetricValue.None,
|
||||
SubsequentSystemIntegrity = ImpactMetricValue.None,
|
||||
SubsequentSystemAvailability = ImpactMetricValue.None
|
||||
};
|
||||
|
||||
#endregion
|
||||
}
|
||||
@@ -0,0 +1,446 @@
|
||||
using System.Collections.Immutable;
|
||||
using FluentAssertions;
|
||||
using Microsoft.Extensions.Logging.Abstractions;
|
||||
using StellaOps.Policy.Counterfactuals;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Policy.Tests.Counterfactuals;
|
||||
|
||||
/// <summary>
|
||||
/// Behavioral tests for CounterfactualEngine.
|
||||
/// Verifies the 5 counterfactual path types and their conditional logic.
|
||||
/// </summary>
|
||||
[Trait("Category", "Unit")]
|
||||
[Trait("Feature", "counterfactual-engine")]
|
||||
public sealed class CounterfactualEngineTests
|
||||
{
|
||||
private readonly CounterfactualEngine _engine;
|
||||
|
||||
public CounterfactualEngineTests()
|
||||
{
|
||||
_engine = new CounterfactualEngine(NullLogger<CounterfactualEngine>.Instance);
|
||||
}
|
||||
|
||||
// ── Already passing ────────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ComputeAsync returns AlreadyPassing when verdict is Pass")]
|
||||
public async Task ComputeAsync_AlreadyPassing_ReturnsNoPaths()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Pass);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config);
|
||||
|
||||
result.FindingId.Should().Be(finding.FindingId);
|
||||
result.CurrentVerdict.Should().Be("Ship");
|
||||
result.TargetVerdict.Should().Be("Ship");
|
||||
result.Paths.Should().BeEmpty();
|
||||
result.HasPaths.Should().BeFalse();
|
||||
result.RecommendedPath.Should().BeNull();
|
||||
}
|
||||
|
||||
// ── Exception path ─────────────────────────────────────
|
||||
|
||||
[Theory(DisplayName = "Exception path effort varies by severity")]
|
||||
[InlineData(PolicySeverity.Critical, 5)]
|
||||
[InlineData(PolicySeverity.High, 4)]
|
||||
[InlineData(PolicySeverity.Medium, 3)]
|
||||
[InlineData(PolicySeverity.Low, 2)]
|
||||
public async Task ExceptionPath_EffortVariesBySeverity(PolicySeverity severity, int expectedEffort)
|
||||
{
|
||||
var finding = PolicyFinding.Create(
|
||||
"finding-1",
|
||||
severity,
|
||||
cve: "CVE-2025-1234",
|
||||
purl: "pkg:npm/lodash@4.17.0",
|
||||
tags: ImmutableArray.Create("vex:not_affected", "reachability:no"));
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeVersionUpgradePaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeExceptionPaths = true,
|
||||
PolicyAllowsExceptions = true
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().ContainSingle();
|
||||
var exceptionPath = result.Paths[0];
|
||||
exceptionPath.Type.Should().Be(CounterfactualType.Exception);
|
||||
exceptionPath.EstimatedEffort.Should().Be(expectedEffort);
|
||||
exceptionPath.Description.Should().Contain("CVE-2025-1234");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "Exception path excluded when PolicyAllowsExceptions is false")]
|
||||
public async Task ExceptionPath_ExcludedWhenPolicyDisallows()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeVersionUpgradePaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeExceptionPaths = true,
|
||||
PolicyAllowsExceptions = false
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().NotContain(p => p.Type == CounterfactualType.Exception);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "Exception path excluded when IncludeExceptionPaths is false")]
|
||||
public async Task ExceptionPath_ExcludedWhenOptionDisabled()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeVersionUpgradePaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeExceptionPaths = false
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().NotContain(p => p.Type == CounterfactualType.Exception);
|
||||
}
|
||||
|
||||
// ── Version upgrade path ───────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "Version upgrade path uses FixedVersionLookup delegate")]
|
||||
public async Task VersionUpgradePath_UsesFixedVersionLookup()
|
||||
{
|
||||
var finding = PolicyFinding.Create(
|
||||
"finding-1",
|
||||
PolicySeverity.High,
|
||||
cve: "CVE-2025-5678",
|
||||
purl: "pkg:npm/lodash@4.17.0",
|
||||
tags: ImmutableArray.Create("vex:not_affected", "reachability:no"));
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeExceptionPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeVersionUpgradePaths = true,
|
||||
FixedVersionLookup = (cve, purl, ct) => Task.FromResult<string?>("4.17.21")
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().ContainSingle();
|
||||
var versionPath = result.Paths[0];
|
||||
versionPath.Type.Should().Be(CounterfactualType.VersionUpgrade);
|
||||
versionPath.Description.Should().Contain("4.17.21");
|
||||
versionPath.Conditions[0].CurrentValue.Should().Be("4.17.0");
|
||||
versionPath.Conditions[0].RequiredValue.Should().Be("4.17.21");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "Version upgrade path not produced when FixedVersionLookup returns null")]
|
||||
public async Task VersionUpgradePath_NotProducedWhenNoFixAvailable()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeExceptionPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeVersionUpgradePaths = true,
|
||||
FixedVersionLookup = (cve, purl, ct) => Task.FromResult<string?>(null)
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().NotContain(p => p.Type == CounterfactualType.VersionUpgrade);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "Version upgrade path not produced when FixedVersionLookup is not set")]
|
||||
public async Task VersionUpgradePath_NotProducedWhenDelegateNotSet()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeExceptionPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeCompensatingControlPaths = false,
|
||||
IncludeVersionUpgradePaths = true,
|
||||
FixedVersionLookup = null
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().NotContain(p => p.Type == CounterfactualType.VersionUpgrade);
|
||||
}
|
||||
|
||||
// ── Compensating control path ──────────────────────────
|
||||
|
||||
[Fact(DisplayName = "Compensating control path has effort 4")]
|
||||
public async Task CompensatingControlPath_HasEffort4()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeExceptionPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeVersionUpgradePaths = false,
|
||||
IncludeCompensatingControlPaths = true,
|
||||
PolicyAllowsCompensatingControls = true
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().ContainSingle();
|
||||
var controlPath = result.Paths[0];
|
||||
controlPath.Type.Should().Be(CounterfactualType.CompensatingControl);
|
||||
controlPath.EstimatedEffort.Should().Be(4);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "Compensating control excluded when PolicyAllowsCompensatingControls is false")]
|
||||
public async Task CompensatingControlPath_ExcludedWhenPolicyDisallows()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var options = new CounterfactualOptions
|
||||
{
|
||||
IncludeVexPaths = false,
|
||||
IncludeExceptionPaths = false,
|
||||
IncludeReachabilityPaths = false,
|
||||
IncludeVersionUpgradePaths = false,
|
||||
IncludeCompensatingControlPaths = true,
|
||||
PolicyAllowsCompensatingControls = false
|
||||
};
|
||||
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config, options);
|
||||
|
||||
result.Paths.Should().BeEmpty();
|
||||
}
|
||||
|
||||
// ── Null validation ────────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ComputeAsync throws on null finding")]
|
||||
public async Task ComputeAsync_ThrowsOnNullFinding()
|
||||
{
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var act = () => _engine.ComputeAsync(null!, verdict, document, config);
|
||||
|
||||
await act.Should().ThrowAsync<ArgumentNullException>();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ComputeAsync throws on null verdict")]
|
||||
public async Task ComputeAsync_ThrowsOnNullVerdict()
|
||||
{
|
||||
var finding = CreateBlockedFinding();
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
var act = () => _engine.ComputeAsync(finding, null!, document, config);
|
||||
|
||||
await act.Should().ThrowAsync<ArgumentNullException>();
|
||||
}
|
||||
|
||||
// ── Default options produce all applicable paths ──────
|
||||
|
||||
[Fact(DisplayName = "Default options include exception and compensating control paths for blocked finding")]
|
||||
public async Task DefaultOptions_IncludeExceptionAndCompensatingControl()
|
||||
{
|
||||
var finding = PolicyFinding.Create(
|
||||
"finding-1",
|
||||
PolicySeverity.High,
|
||||
cve: "CVE-2025-9999",
|
||||
purl: "pkg:npm/express@4.18.0",
|
||||
tags: ImmutableArray.Create("vex:not_affected", "reachability:no"));
|
||||
var verdict = CreateVerdict(PolicyVerdictStatus.Blocked);
|
||||
var document = CreateDocument();
|
||||
var config = PolicyScoringConfig.Default;
|
||||
|
||||
// Use default options (all enabled, but no FixedVersionLookup)
|
||||
var result = await _engine.ComputeAsync(finding, verdict, document, config);
|
||||
|
||||
// Exception + compensating control should always be present for a blocked finding with CVE
|
||||
result.Paths.Should().Contain(p => p.Type == CounterfactualType.Exception);
|
||||
result.Paths.Should().Contain(p => p.Type == CounterfactualType.CompensatingControl);
|
||||
}
|
||||
|
||||
// ── Result model ───────────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "CounterfactualResult.Blocked sorts paths by effort")]
|
||||
public void CounterfactualResult_Blocked_SortsByEffort()
|
||||
{
|
||||
var paths = new[]
|
||||
{
|
||||
CounterfactualPath.CompensatingControl("f1", effort: 4),
|
||||
CounterfactualPath.Vex("affected", "CVE-1", effort: 2),
|
||||
CounterfactualPath.Exception("CVE-1", effort: 5)
|
||||
};
|
||||
|
||||
var result = CounterfactualResult.Blocked("f1", paths);
|
||||
|
||||
result.Paths[0].EstimatedEffort.Should().Be(2);
|
||||
result.Paths[1].EstimatedEffort.Should().Be(4);
|
||||
result.Paths[2].EstimatedEffort.Should().Be(5);
|
||||
result.RecommendedPath!.Type.Should().Be(CounterfactualType.VexStatus);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "CounterfactualResult.AlreadyPassing has Ship verdict and no paths")]
|
||||
public void CounterfactualResult_AlreadyPassing_Properties()
|
||||
{
|
||||
var result = CounterfactualResult.AlreadyPassing("f1");
|
||||
|
||||
result.FindingId.Should().Be("f1");
|
||||
result.CurrentVerdict.Should().Be("Ship");
|
||||
result.TargetVerdict.Should().Be("Ship");
|
||||
result.HasPaths.Should().BeFalse();
|
||||
result.RecommendedPath.Should().BeNull();
|
||||
}
|
||||
|
||||
// ── CounterfactualPath factory methods ─────────────────
|
||||
|
||||
[Fact(DisplayName = "CounterfactualPath.Vex creates correct path structure")]
|
||||
public void CounterfactualPath_Vex_CorrectStructure()
|
||||
{
|
||||
var path = CounterfactualPath.Vex("affected", "CVE-2025-001", effort: 2);
|
||||
|
||||
path.Type.Should().Be(CounterfactualType.VexStatus);
|
||||
path.EstimatedEffort.Should().Be(2);
|
||||
path.Actor.Should().Contain("Vendor");
|
||||
path.Conditions.Should().ContainSingle();
|
||||
path.Conditions[0].CurrentValue.Should().Be("affected");
|
||||
path.Conditions[0].RequiredValue.Should().Be("NotAffected");
|
||||
path.Conditions[0].IsMet.Should().BeFalse();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "CounterfactualPath.Exception creates correct path structure")]
|
||||
public void CounterfactualPath_Exception_CorrectStructure()
|
||||
{
|
||||
var path = CounterfactualPath.Exception("CVE-2025-002", effort: 4);
|
||||
|
||||
path.Type.Should().Be(CounterfactualType.Exception);
|
||||
path.EstimatedEffort.Should().Be(4);
|
||||
path.Actor.Should().Contain("Security");
|
||||
path.Description.Should().Contain("CVE-2025-002");
|
||||
path.ActionUri.Should().Contain("CVE-2025-002");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "CounterfactualPath.Reachability creates correct path structure")]
|
||||
public void CounterfactualPath_Reachability_CorrectStructure()
|
||||
{
|
||||
var path = CounterfactualPath.Reachability("yes", "finding-1", effort: 4);
|
||||
|
||||
path.Type.Should().Be(CounterfactualType.Reachability);
|
||||
path.EstimatedEffort.Should().Be(4);
|
||||
path.Actor.Should().Contain("Development");
|
||||
path.Conditions[0].CurrentValue.Should().Be("yes");
|
||||
path.Conditions[0].RequiredValue.Should().Contain("not reachable");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "CounterfactualPath.VersionUpgrade creates correct path structure")]
|
||||
public void CounterfactualPath_VersionUpgrade_CorrectStructure()
|
||||
{
|
||||
var path = CounterfactualPath.VersionUpgrade("4.17.0", "4.17.21", "pkg:npm/lodash@4.17.0", effort: 2);
|
||||
|
||||
path.Type.Should().Be(CounterfactualType.VersionUpgrade);
|
||||
path.EstimatedEffort.Should().Be(2);
|
||||
path.Description.Should().Contain("4.17.21");
|
||||
path.Conditions[0].CurrentValue.Should().Be("4.17.0");
|
||||
path.Conditions[0].RequiredValue.Should().Be("4.17.21");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "CounterfactualPath.CompensatingControl creates correct path structure")]
|
||||
public void CounterfactualPath_CompensatingControl_CorrectStructure()
|
||||
{
|
||||
var path = CounterfactualPath.CompensatingControl("finding-1", effort: 4);
|
||||
|
||||
path.Type.Should().Be(CounterfactualType.CompensatingControl);
|
||||
path.EstimatedEffort.Should().Be(4);
|
||||
path.Actor.Should().Contain("Security");
|
||||
path.ActionUri.Should().Contain("finding-1");
|
||||
}
|
||||
|
||||
// ── Helpers ────────────────────────────────────────────
|
||||
|
||||
private static PolicyFinding CreateBlockedFinding()
|
||||
{
|
||||
return PolicyFinding.Create(
|
||||
"finding-blocked-1",
|
||||
PolicySeverity.High,
|
||||
cve: "CVE-2025-1234",
|
||||
purl: "pkg:npm/lodash@4.17.0",
|
||||
tags: ImmutableArray.Create("vex:affected", "reachability:yes"));
|
||||
}
|
||||
|
||||
private static PolicyVerdict CreateVerdict(PolicyVerdictStatus status)
|
||||
{
|
||||
return new PolicyVerdict(
|
||||
FindingId: "finding-blocked-1",
|
||||
Status: status,
|
||||
RuleName: "BlockHigh",
|
||||
Score: 75.0);
|
||||
}
|
||||
|
||||
private static PolicyDocument CreateDocument()
|
||||
{
|
||||
var action = new PolicyAction(PolicyActionType.Block, null, null, null, false);
|
||||
var rule = PolicyRule.Create(
|
||||
"BlockHigh",
|
||||
action,
|
||||
ImmutableArray.Create(PolicySeverity.High, PolicySeverity.Critical),
|
||||
ImmutableArray<string>.Empty,
|
||||
ImmutableArray<string>.Empty,
|
||||
ImmutableArray<string>.Empty,
|
||||
ImmutableArray<string>.Empty,
|
||||
ImmutableArray<string>.Empty,
|
||||
PolicyRuleMatchCriteria.Empty,
|
||||
expires: null,
|
||||
justification: null);
|
||||
|
||||
return new PolicyDocument(
|
||||
PolicySchema.CurrentVersion,
|
||||
ImmutableArray.Create(rule),
|
||||
ImmutableDictionary<string, string>.Empty,
|
||||
PolicyExceptionConfiguration.Empty);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,566 @@
|
||||
using FluentAssertions;
|
||||
using StellaOps.Policy.Determinization.Scoring;
|
||||
using StellaOps.Policy.Scoring;
|
||||
using Xunit;
|
||||
|
||||
using ScorePolicy = StellaOps.Policy.Scoring.ScorePolicy;
|
||||
using WeightsBps = StellaOps.Policy.Scoring.WeightsBps;
|
||||
|
||||
namespace StellaOps.Policy.Tests.Scoring;
|
||||
|
||||
/// <summary>
|
||||
/// Behavioral tests for the Evidence-Weighted Score (EWS) model components:
|
||||
/// SignalWeights, ScoringWeights, GradeThresholds, SeverityMultipliers,
|
||||
/// FreshnessDecayConfig, TrustSourceWeightService, and ScorePolicyLoader.
|
||||
/// </summary>
|
||||
[Trait("Category", "Unit")]
|
||||
[Trait("Feature", "evidence-weighted-score-model")]
|
||||
public sealed class EvidenceWeightedScoreModelTests
|
||||
{
|
||||
// ─── SignalWeights (6-dimension) ───────────────────────────
|
||||
|
||||
[Fact(DisplayName = "SignalWeights.Default has 6 dimensions summing to 1.0")]
|
||||
public void SignalWeights_Default_SixDimensionsSumToOne()
|
||||
{
|
||||
var w = SignalWeights.Default;
|
||||
|
||||
w.VexWeight.Should().Be(0.25);
|
||||
w.EpssWeight.Should().Be(0.15);
|
||||
w.ReachabilityWeight.Should().Be(0.25);
|
||||
w.RuntimeWeight.Should().Be(0.15);
|
||||
w.BackportWeight.Should().Be(0.10);
|
||||
w.SbomLineageWeight.Should().Be(0.10);
|
||||
w.TotalWeight.Should().BeApproximately(1.0, 0.001);
|
||||
w.IsNormalized().Should().BeTrue();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "SignalWeights.IsNormalized returns false for non-normalized weights")]
|
||||
public void SignalWeights_IsNormalized_FalseForNonNormalized()
|
||||
{
|
||||
var w = new SignalWeights
|
||||
{
|
||||
VexWeight = 0.50,
|
||||
EpssWeight = 0.50,
|
||||
ReachabilityWeight = 0.50,
|
||||
RuntimeWeight = 0.0,
|
||||
BackportWeight = 0.0,
|
||||
SbomLineageWeight = 0.0
|
||||
};
|
||||
|
||||
w.TotalWeight.Should().Be(1.5);
|
||||
w.IsNormalized().Should().BeFalse();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "SignalWeights.IsNormalized respects tolerance parameter")]
|
||||
public void SignalWeights_IsNormalized_RespectsToleranceParameter()
|
||||
{
|
||||
var w = new SignalWeights
|
||||
{
|
||||
VexWeight = 0.25,
|
||||
EpssWeight = 0.15,
|
||||
ReachabilityWeight = 0.25,
|
||||
RuntimeWeight = 0.15,
|
||||
BackportWeight = 0.10,
|
||||
SbomLineageWeight = 0.11 // 1.01 total
|
||||
};
|
||||
|
||||
w.IsNormalized(tolerance: 0.001).Should().BeFalse();
|
||||
w.IsNormalized(tolerance: 0.02).Should().BeTrue();
|
||||
}
|
||||
|
||||
// ─── ScoringWeights (6-category) ──────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ScoringWeights.Default validates to true (sums to 1.0)")]
|
||||
public void ScoringWeights_Default_ValidatesToTrue()
|
||||
{
|
||||
var w = new ScoringWeights();
|
||||
|
||||
w.Vulnerability.Should().Be(0.25);
|
||||
w.Exploitability.Should().Be(0.20);
|
||||
w.Reachability.Should().Be(0.20);
|
||||
w.Compliance.Should().Be(0.15);
|
||||
w.SupplyChain.Should().Be(0.10);
|
||||
w.Mitigation.Should().Be(0.10);
|
||||
w.Validate().Should().BeTrue();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ScoringWeights.Validate returns false when sum is not 1.0")]
|
||||
public void ScoringWeights_Validate_FalseWhenNotNormalized()
|
||||
{
|
||||
var w = new ScoringWeights
|
||||
{
|
||||
Vulnerability = 0.50,
|
||||
Exploitability = 0.50,
|
||||
Reachability = 0.20
|
||||
};
|
||||
|
||||
w.Validate().Should().BeFalse();
|
||||
}
|
||||
|
||||
// ─── GradeThresholds ──────────────────────────────────────
|
||||
|
||||
[Theory(DisplayName = "GradeThresholds.GetGrade maps scores to correct letter grades")]
|
||||
[InlineData(100, "A")]
|
||||
[InlineData(95, "A")]
|
||||
[InlineData(90, "A")]
|
||||
[InlineData(89, "B")]
|
||||
[InlineData(80, "B")]
|
||||
[InlineData(79, "C")]
|
||||
[InlineData(70, "C")]
|
||||
[InlineData(69, "D")]
|
||||
[InlineData(60, "D")]
|
||||
[InlineData(59, "F")]
|
||||
[InlineData(0, "F")]
|
||||
[InlineData(-1, "F")]
|
||||
public void GradeThresholds_GetGrade_MapsCorrectly(int score, string expectedGrade)
|
||||
{
|
||||
var thresholds = new GradeThresholds();
|
||||
|
||||
thresholds.GetGrade(score).Should().Be(expectedGrade);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GradeThresholds with custom values apply correctly")]
|
||||
public void GradeThresholds_CustomValues_ApplyCorrectly()
|
||||
{
|
||||
var thresholds = new GradeThresholds
|
||||
{
|
||||
A = 95,
|
||||
B = 85,
|
||||
C = 75,
|
||||
D = 65
|
||||
};
|
||||
|
||||
thresholds.GetGrade(96).Should().Be("A");
|
||||
thresholds.GetGrade(94).Should().Be("B");
|
||||
thresholds.GetGrade(84).Should().Be("C");
|
||||
thresholds.GetGrade(74).Should().Be("D");
|
||||
thresholds.GetGrade(64).Should().Be("F");
|
||||
}
|
||||
|
||||
// ─── SeverityMultipliers ──────────────────────────────────
|
||||
|
||||
[Theory(DisplayName = "SeverityMultipliers.GetMultiplier returns correct value for each severity")]
|
||||
[InlineData("CRITICAL", 1.5)]
|
||||
[InlineData("HIGH", 1.2)]
|
||||
[InlineData("MEDIUM", 1.0)]
|
||||
[InlineData("LOW", 0.8)]
|
||||
[InlineData("INFORMATIONAL", 0.5)]
|
||||
[InlineData("INFO", 0.5)]
|
||||
[InlineData("critical", 1.5)]
|
||||
[InlineData("high", 1.2)]
|
||||
public void SeverityMultipliers_GetMultiplier_ReturnsCorrectValue(string severity, double expected)
|
||||
{
|
||||
var m = new SeverityMultipliers();
|
||||
|
||||
m.GetMultiplier(severity).Should().Be(expected);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "SeverityMultipliers.GetMultiplier defaults to Medium for unknown severity")]
|
||||
public void SeverityMultipliers_GetMultiplier_DefaultsToMedium()
|
||||
{
|
||||
var m = new SeverityMultipliers();
|
||||
|
||||
m.GetMultiplier("UNKNOWN").Should().Be(1.0);
|
||||
m.GetMultiplier("").Should().Be(1.0);
|
||||
}
|
||||
|
||||
// ─── FreshnessDecayConfig ─────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "FreshnessDecayConfig defaults match specification")]
|
||||
public void FreshnessDecayConfig_Defaults_MatchSpec()
|
||||
{
|
||||
var config = new FreshnessDecayConfig();
|
||||
|
||||
config.SbomDecayStartHours.Should().Be(168); // 7 days
|
||||
config.FeedDecayStartHours.Should().Be(24);
|
||||
config.DecayRatePerHour.Should().Be(0.001);
|
||||
config.MinimumFreshness.Should().Be(0.5);
|
||||
}
|
||||
|
||||
// ─── WeightsBps (4-factor basis points) ───────────────────
|
||||
|
||||
[Fact(DisplayName = "WeightsBps.Default sums to 10000")]
|
||||
public void WeightsBps_Default_SumsTo10000()
|
||||
{
|
||||
var w = WeightsBps.Default;
|
||||
|
||||
(w.BaseSeverity + w.Reachability + w.Evidence + w.Provenance).Should().Be(10000);
|
||||
w.BaseSeverity.Should().Be(1000);
|
||||
w.Reachability.Should().Be(4500);
|
||||
w.Evidence.Should().Be(3000);
|
||||
w.Provenance.Should().Be(1500);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ScorePolicy.Default validates weights correctly")]
|
||||
public void ScorePolicy_Default_ValidatesWeights()
|
||||
{
|
||||
var policy = ScorePolicy.Default;
|
||||
|
||||
policy.ValidateWeights().Should().BeTrue();
|
||||
policy.PolicyVersion.Should().Be("score.v1");
|
||||
policy.ScoringProfile.Should().Be("advanced");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ScorePolicy.ValidateWeights rejects invalid sums")]
|
||||
public void ScorePolicy_ValidateWeights_RejectsInvalidSum()
|
||||
{
|
||||
var policy = new ScorePolicy
|
||||
{
|
||||
PolicyVersion = "score.v1",
|
||||
WeightsBps = new WeightsBps
|
||||
{
|
||||
BaseSeverity = 1000,
|
||||
Reachability = 1000,
|
||||
Evidence = 1000,
|
||||
Provenance = 1000
|
||||
}
|
||||
};
|
||||
|
||||
policy.ValidateWeights().Should().BeFalse();
|
||||
}
|
||||
|
||||
// ─── ReachabilityPolicyConfig ─────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ReachabilityPolicyConfig.Default has 6 hop buckets with decreasing scores")]
|
||||
public void ReachabilityPolicyConfig_Default_HasDecreasingBuckets()
|
||||
{
|
||||
var config = ReachabilityPolicyConfig.Default;
|
||||
|
||||
config.HopBuckets.Should().NotBeNull();
|
||||
config.HopBuckets!.Should().HaveCount(6);
|
||||
config.HopBuckets![0].Score.Should().Be(100); // Direct call
|
||||
config.HopBuckets![1].Score.Should().Be(90); // 1 hop
|
||||
config.HopBuckets![2].Score.Should().Be(70); // 2-3 hops
|
||||
config.HopBuckets![3].Score.Should().Be(50); // 4-5 hops
|
||||
config.HopBuckets![4].Score.Should().Be(30); // 6-10 hops
|
||||
config.HopBuckets![5].Score.Should().Be(10); // > 10 hops
|
||||
config.UnreachableScore.Should().Be(0);
|
||||
}
|
||||
|
||||
// ─── EvidencePolicyConfig ─────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "EvidencePolicyConfig.Default has 6 freshness buckets with decreasing freshness")]
|
||||
public void EvidencePolicyConfig_Default_HasDecreasingFreshnessBuckets()
|
||||
{
|
||||
var config = EvidencePolicyConfig.Default;
|
||||
|
||||
config.FreshnessBuckets.Should().NotBeNull();
|
||||
config.FreshnessBuckets!.Should().HaveCount(6);
|
||||
config.FreshnessBuckets![0].Should().Be(new FreshnessBucket(7, 10000)); // 100%
|
||||
config.FreshnessBuckets![1].Should().Be(new FreshnessBucket(30, 9000)); // 90%
|
||||
config.FreshnessBuckets![2].Should().Be(new FreshnessBucket(90, 7000)); // 70%
|
||||
config.FreshnessBuckets![3].Should().Be(new FreshnessBucket(180, 5000)); // 50%
|
||||
config.FreshnessBuckets![4].Should().Be(new FreshnessBucket(365, 3000)); // 30%
|
||||
config.FreshnessBuckets![5].Should().Be(new FreshnessBucket(int.MaxValue, 1000)); // 10%
|
||||
}
|
||||
|
||||
// ─── ProvenanceLevels ─────────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ProvenanceLevels.Default increases from Unsigned to Reproducible")]
|
||||
public void ProvenanceLevels_Default_IncreasingScale()
|
||||
{
|
||||
var levels = ProvenanceLevels.Default;
|
||||
|
||||
levels.Unsigned.Should().Be(0);
|
||||
levels.Signed.Should().Be(30);
|
||||
levels.SignedWithSbom.Should().Be(60);
|
||||
levels.SignedWithSbomAndAttestations.Should().Be(80);
|
||||
levels.Reproducible.Should().Be(100);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Tests for TrustSourceWeightService - the weighted source merging engine.
|
||||
/// </summary>
|
||||
[Trait("Category", "Unit")]
|
||||
[Trait("Feature", "evidence-weighted-score-model")]
|
||||
public sealed class TrustSourceWeightServiceTests
|
||||
{
|
||||
private readonly TrustSourceWeightService _service;
|
||||
|
||||
public TrustSourceWeightServiceTests()
|
||||
{
|
||||
_service = new TrustSourceWeightService();
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight returns explicit weight for known sources")]
|
||||
public void GetSourceWeight_ReturnsExplicitWeight_ForKnownSources()
|
||||
{
|
||||
var nvdSource = CreateSource(KnownSources.NvdNist, SourceCategory.Government);
|
||||
var cisaSource = CreateSource(KnownSources.CisaKev, SourceCategory.Government);
|
||||
var osvSource = CreateSource(KnownSources.Osv, SourceCategory.Community);
|
||||
|
||||
_service.GetSourceWeight(nvdSource).Should().Be(0.90);
|
||||
_service.GetSourceWeight(cisaSource).Should().Be(0.98);
|
||||
_service.GetSourceWeight(osvSource).Should().Be(0.75);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight falls back to category weight for unknown sources")]
|
||||
public void GetSourceWeight_FallsBackToCategoryWeight()
|
||||
{
|
||||
var unknownGov = CreateSource("unknown-gov-source", SourceCategory.Government);
|
||||
|
||||
_service.GetSourceWeight(unknownGov).Should().Be(0.95);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight falls back to default for completely unknown source")]
|
||||
public void GetSourceWeight_FallsBackToDefault()
|
||||
{
|
||||
// Create a source with a category that isn't in defaults - use Internal since it's defined
|
||||
var config = new TrustSourceWeightConfig
|
||||
{
|
||||
Weights = System.Collections.Immutable.ImmutableDictionary<string, double>.Empty,
|
||||
CategoryWeights = System.Collections.Immutable.ImmutableDictionary<SourceCategory, double>.Empty,
|
||||
DefaultWeight = 0.42
|
||||
};
|
||||
var service = new TrustSourceWeightService(config);
|
||||
|
||||
var source = CreateSource("totally-unknown", SourceCategory.Government);
|
||||
|
||||
service.GetSourceWeight(source).Should().Be(0.42);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight boosts signed data by 1.05x")]
|
||||
public void GetSourceWeight_BoostsSignedData()
|
||||
{
|
||||
var unsigned = CreateSource(KnownSources.NvdNist, SourceCategory.Government, isSigned: false);
|
||||
var signed = CreateSource(KnownSources.NvdNist, SourceCategory.Government, isSigned: true);
|
||||
|
||||
var unsignedWeight = _service.GetSourceWeight(unsigned);
|
||||
var signedWeight = _service.GetSourceWeight(signed);
|
||||
|
||||
signedWeight.Should().BeGreaterThan(unsignedWeight);
|
||||
signedWeight.Should().BeApproximately(0.90 * 1.05, 0.001);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight penalizes stale data >7 days old")]
|
||||
public void GetSourceWeight_PenalizesStaleData()
|
||||
{
|
||||
var fresh = CreateSource(KnownSources.NvdNist, SourceCategory.Government,
|
||||
fetchedAt: DateTimeOffset.UtcNow.AddDays(-1));
|
||||
var stale = CreateSource(KnownSources.NvdNist, SourceCategory.Government,
|
||||
fetchedAt: DateTimeOffset.UtcNow.AddDays(-10));
|
||||
|
||||
var freshWeight = _service.GetSourceWeight(fresh);
|
||||
var staleWeight = _service.GetSourceWeight(stale);
|
||||
|
||||
staleWeight.Should().BeLessThan(freshWeight);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight applies double penalty for >30 days stale data")]
|
||||
public void GetSourceWeight_AppliesDoublePenaltyForVeryStaleData()
|
||||
{
|
||||
var moderatelyStale = CreateSource(KnownSources.NvdNist, SourceCategory.Government,
|
||||
fetchedAt: DateTimeOffset.UtcNow.AddDays(-10));
|
||||
var veryStale = CreateSource(KnownSources.NvdNist, SourceCategory.Government,
|
||||
fetchedAt: DateTimeOffset.UtcNow.AddDays(-35));
|
||||
|
||||
var moderatelyStaleWeight = _service.GetSourceWeight(moderatelyStale);
|
||||
var veryStaleWeight = _service.GetSourceWeight(veryStale);
|
||||
|
||||
// >30 days gets both the >7d (0.95x) and >30d (0.90x) penalties
|
||||
veryStaleWeight.Should().BeLessThan(moderatelyStaleWeight);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "GetSourceWeight clamps to [0.0, 1.0] range")]
|
||||
public void GetSourceWeight_ClampsToValidRange()
|
||||
{
|
||||
// Even with boost, CISA-KEV (0.98 * 1.05 = 1.029) should clamp to 1.0
|
||||
var signedCisa = CreateSource(KnownSources.CisaKev, SourceCategory.Government, isSigned: true);
|
||||
|
||||
_service.GetSourceWeight(signedCisa).Should().BeLessThanOrEqualTo(1.0);
|
||||
_service.GetSourceWeight(signedCisa).Should().BeGreaterThanOrEqualTo(0.0);
|
||||
}
|
||||
|
||||
// ─── MergeFindings ────────────────────────────────────────
|
||||
|
||||
[Fact(DisplayName = "MergeFindings with empty list returns zero confidence")]
|
||||
public void MergeFindings_EmptyList_ReturnsZeroConfidence()
|
||||
{
|
||||
var result = _service.MergeFindings([]);
|
||||
|
||||
result.Confidence.Should().Be(0);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings uses highest-weight source for severity")]
|
||||
public void MergeFindings_UsesHighestWeightSourceForSeverity()
|
||||
{
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.CisaKev, SourceCategory.Government, severity: "CRITICAL", cvss: 9.8),
|
||||
CreateFinding(KnownSources.Osv, SourceCategory.Community, severity: "HIGH", cvss: 7.5)
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
// CISA-KEV has highest weight (0.98), so its severity should be used
|
||||
result.Severity.Should().Be("CRITICAL");
|
||||
result.ContributingSources.Should().HaveCount(2);
|
||||
result.ContributingSources[0].Should().Be(KnownSources.CisaKev);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings computes weighted CVSS average")]
|
||||
public void MergeFindings_ComputesWeightedCvssAverage()
|
||||
{
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.NvdNist, SourceCategory.Government, severity: "CRITICAL", cvss: 9.0),
|
||||
CreateFinding(KnownSources.Osv, SourceCategory.Community, severity: "CRITICAL", cvss: 7.0)
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
result.CvssScore.Should().NotBeNull();
|
||||
// Weighted average: (9.0 * 0.90 + 7.0 * 0.75) / (0.90 + 0.75) = 13.35 / 1.65 = 8.09
|
||||
result.CvssScore!.Value.Should().BeApproximately(8.09, 0.1);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings applies corroboration boost when sources agree on severity")]
|
||||
public void MergeFindings_AppliesCorroborationBoost()
|
||||
{
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.NvdNist, SourceCategory.Government, severity: "HIGH", cvss: 8.0),
|
||||
CreateFinding(KnownSources.CisaKev, SourceCategory.Government, severity: "HIGH", cvss: 8.5),
|
||||
CreateFinding(KnownSources.Osv, SourceCategory.Community, severity: "HIGH", cvss: 7.5)
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
result.Corroborated.Should().BeTrue();
|
||||
result.CorroborationBoost.Should().BeGreaterThan(0);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings does not corroborate when severities disagree")]
|
||||
public void MergeFindings_NoCorroborationWhenSeveritiesDisagree()
|
||||
{
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.NvdNist, SourceCategory.Government, severity: "HIGH", cvss: 8.0),
|
||||
CreateFinding(KnownSources.Osv, SourceCategory.Community, severity: "CRITICAL", cvss: 9.5)
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
result.Corroborated.Should().BeFalse();
|
||||
result.CorroborationBoost.Should().Be(0);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings selects earliest fix version")]
|
||||
public void MergeFindings_SelectsEarliestFixVersion()
|
||||
{
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.NvdNist, SourceCategory.Government, fixVersion: "2.0.1"),
|
||||
CreateFinding(KnownSources.VendorAdvisory, SourceCategory.Vendor, fixVersion: "1.9.5")
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
// Should pick earliest (alphabetical sort: "1.9.5" < "2.0.1")
|
||||
result.FixVersion.Should().Be("1.9.5");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "MergeFindings confidence is clamped to 1.0")]
|
||||
public void MergeFindings_ConfidenceClamped()
|
||||
{
|
||||
// High weight source + corroboration boost could exceed 1.0
|
||||
var findings = new[]
|
||||
{
|
||||
CreateFinding(KnownSources.CisaKev, SourceCategory.Government, severity: "CRITICAL"),
|
||||
CreateFinding(KnownSources.NvdNist, SourceCategory.Government, severity: "CRITICAL"),
|
||||
CreateFinding(KnownSources.VendorAdvisory, SourceCategory.Vendor, severity: "CRITICAL")
|
||||
};
|
||||
|
||||
var result = _service.MergeFindings(findings);
|
||||
|
||||
result.Confidence.Should().BeLessThanOrEqualTo(1.0);
|
||||
}
|
||||
|
||||
// ─── ScoringRulesSnapshotBuilder ──────────────────────────
|
||||
|
||||
[Fact(DisplayName = "ScoringRulesSnapshotBuilder.Build computes content-addressed digest")]
|
||||
public void SnapshotBuilder_Build_ComputesDigest()
|
||||
{
|
||||
var snapshot = ScoringRulesSnapshotBuilder
|
||||
.Create("snap-1", 1, DateTimeOffset.UtcNow)
|
||||
.WithDescription("test snapshot")
|
||||
.Build();
|
||||
|
||||
snapshot.Digest.Should().NotBeNullOrEmpty();
|
||||
snapshot.Digest.Should().StartWith("sha256:");
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ScoringRulesSnapshotBuilder.Build is deterministic")]
|
||||
public void SnapshotBuilder_Build_IsDeterministic()
|
||||
{
|
||||
var ts = new DateTimeOffset(2026, 1, 1, 0, 0, 0, TimeSpan.Zero);
|
||||
|
||||
var snap1 = ScoringRulesSnapshotBuilder
|
||||
.Create("snap-1", 1, ts)
|
||||
.WithDescription("test")
|
||||
.Build();
|
||||
|
||||
var snap2 = ScoringRulesSnapshotBuilder
|
||||
.Create("snap-1", 1, ts)
|
||||
.WithDescription("test")
|
||||
.Build();
|
||||
|
||||
snap1.Digest.Should().Be(snap2.Digest);
|
||||
}
|
||||
|
||||
[Fact(DisplayName = "ScoringRulesSnapshotBuilder.Build throws when weights are invalid")]
|
||||
public void SnapshotBuilder_Build_ThrowsOnInvalidWeights()
|
||||
{
|
||||
var builder = ScoringRulesSnapshotBuilder
|
||||
.Create("snap-bad", 1, DateTimeOffset.UtcNow)
|
||||
.WithWeights(new ScoringWeights
|
||||
{
|
||||
Vulnerability = 0.50,
|
||||
Exploitability = 0.50,
|
||||
Reachability = 0.50
|
||||
});
|
||||
|
||||
var act = () => builder.Build();
|
||||
|
||||
act.Should().Throw<InvalidOperationException>()
|
||||
.WithMessage("*weights*sum*");
|
||||
}
|
||||
|
||||
// ─── Helpers ──────────────────────────────────────────────
|
||||
|
||||
private static SourceMetadata CreateSource(
|
||||
string id,
|
||||
SourceCategory category,
|
||||
bool isSigned = false,
|
||||
DateTimeOffset? fetchedAt = null)
|
||||
{
|
||||
return new SourceMetadata
|
||||
{
|
||||
Id = id,
|
||||
Category = category,
|
||||
IsSigned = isSigned,
|
||||
FetchedAt = fetchedAt
|
||||
};
|
||||
}
|
||||
|
||||
private static SourceFinding CreateFinding(
|
||||
string sourceId,
|
||||
SourceCategory category,
|
||||
string? severity = null,
|
||||
double? cvss = null,
|
||||
string? fixVersion = null)
|
||||
{
|
||||
return new SourceFinding
|
||||
{
|
||||
Source = new SourceMetadata
|
||||
{
|
||||
Id = sourceId,
|
||||
Category = category
|
||||
},
|
||||
Severity = severity,
|
||||
CvssScore = cvss,
|
||||
FixVersion = fixVersion
|
||||
};
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user