UI work to fill SBOM sourcing management gap. UI planning remaining functionality exposure. Work on CI/Tests stabilization
Introduces CGS determinism test runs to CI workflows for Windows, macOS, Linux, Alpine, and Debian, fulfilling CGS-008 cross-platform requirements. Updates local-ci scripts to support new smoke steps, test timeouts, progress intervals, and project slicing for improved test isolation and diagnostics.
This commit is contained in:
master
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// -----------------------------------------------------------------------------
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// LineageDeterminismTests.cs
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// Sprint: SPRINT_20251229_005_001_BE_sbom_lineage_api (LIN-013)
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// Task: Add determinism tests for node/edge ordering
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// Description: Verify lineage graph queries produce deterministic outputs with stable ordering.
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// -----------------------------------------------------------------------------
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using System.Text.Json;
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using FluentAssertions;
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using StellaOps.SbomService.Models;
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using StellaOps.TestKit;
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using Xunit;
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using Xunit.Abstractions;
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namespace StellaOps.SbomService.Tests.Lineage;
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/// <summary>
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/// Determinism tests for SBOM lineage graph operations.
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/// Validates that:
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/// - Same input always produces identical output
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/// - Node and edge ordering is stable
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/// - JSON serialization is deterministic
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/// - Diff operations are commutative
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/// </summary>
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[Trait("Category", TestCategories.Determinism)]
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[Trait("Category", TestCategories.Unit)]
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public sealed class LineageDeterminismTests
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{
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private readonly ITestOutputHelper _output;
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private static readonly JsonSerializerOptions CanonicalJsonOptions = new()
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{
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
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WriteIndented = false,
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DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull
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};
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public LineageDeterminismTests(ITestOutputHelper output)
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{
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_output = output;
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}
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#region Node/Edge Ordering Tests
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[Fact]
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public void LineageGraph_NodesAreSortedDeterministically()
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{
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// Arrange - Create graph with nodes in random order
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var nodes = new List<LineageNode>
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{
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new LineageNode("sha256:zzz123", "app-v3", DateTimeOffset.Parse("2025-01-03T00:00:00Z")),
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new LineageNode("sha256:aaa456", "app-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:mmm789", "app-v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z"))
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};
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var edges = new List<LineageEdge>
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{
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new LineageEdge("sha256:aaa456", "sha256:mmm789", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:mmm789", "sha256:zzz123", LineageRelationship.DerivedFrom)
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};
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var graph1 = new LineageGraph(nodes, edges);
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var graph2 = new LineageGraph(nodes.OrderByDescending(n => n.Digest).ToList(), edges);
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var graph3 = new LineageGraph(nodes.OrderBy(n => n.Version).ToList(), edges);
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// Act - Serialize each graph
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var json1 = JsonSerializer.Serialize(graph1, CanonicalJsonOptions);
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var json2 = JsonSerializer.Serialize(graph2, CanonicalJsonOptions);
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var json3 = JsonSerializer.Serialize(graph3, CanonicalJsonOptions);
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// Assert - All should produce identical JSON
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json1.Should().Be(json2, "node ordering should not affect output");
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json1.Should().Be(json3, "node ordering should not affect output");
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_output.WriteLine($"Deterministic JSON: {json1}");
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}
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[Fact]
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public void LineageGraph_EdgesAreSortedDeterministically()
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{
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// Arrange - Create edges in different orders
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var edges1 = new List<LineageEdge>
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{
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new LineageEdge("sha256:zzz", "sha256:yyy", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:aaa", "sha256:bbb", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:mmm", "sha256:nnn", LineageRelationship.VariantOf)
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};
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var edges2 = new List<LineageEdge>
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{
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new LineageEdge("sha256:mmm", "sha256:nnn", LineageRelationship.VariantOf),
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new LineageEdge("sha256:aaa", "sha256:bbb", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:zzz", "sha256:yyy", LineageRelationship.DerivedFrom)
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};
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var edges3 = edges1.OrderByDescending(e => e.From).ToList();
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var nodes = new List<LineageNode>
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{
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new LineageNode("sha256:aaa", "v1", DateTimeOffset.UtcNow)
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};
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var graph1 = new LineageGraph(nodes, edges1);
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var graph2 = new LineageGraph(nodes, edges2);
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var graph3 = new LineageGraph(nodes, edges3);
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// Act
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var json1 = JsonSerializer.Serialize(graph1, CanonicalJsonOptions);
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var json2 = JsonSerializer.Serialize(graph2, CanonicalJsonOptions);
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var json3 = JsonSerializer.Serialize(graph3, CanonicalJsonOptions);
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// Assert - All should produce identical JSON
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json1.Should().Be(json2, "edge ordering should not affect output");
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json1.Should().Be(json3, "edge ordering should not affect output");
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_output.WriteLine($"Deterministic JSON: {json1}");
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}
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#endregion
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#region Multiple Iteration Tests
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[Fact]
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public void LineageGraph_Serialization_IsStableAcross10Iterations()
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{
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// Arrange
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var graph = CreateComplexLineageGraph();
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var jsonOutputs = new List<string>();
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// Act - Serialize 10 times
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for (int i = 0; i < 10; i++)
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{
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var json = JsonSerializer.Serialize(graph, CanonicalJsonOptions);
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jsonOutputs.Add(json);
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_output.WriteLine($"Iteration {i + 1}: {json.Length} bytes");
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}
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// Assert - All outputs should be identical
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jsonOutputs.Distinct().Should().HaveCount(1,
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"serialization should be deterministic across iterations");
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_output.WriteLine($"Stable JSON hash: {ComputeHash(jsonOutputs[0])}");
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}
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[Fact]
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public void LineageDiff_ProducesSameResult_Across10Iterations()
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{
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// Arrange
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var fromNodes = new List<LineageNode>
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{
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new LineageNode("sha256:aaa", "app-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:bbb", "lib-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z"))
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};
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var toNodes = new List<LineageNode>
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{
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new LineageNode("sha256:ccc", "app-v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z")),
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new LineageNode("sha256:bbb", "lib-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:ddd", "lib-v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z"))
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};
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var diff = new LineageDiff
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{
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AddedNodes = toNodes.Except(fromNodes).ToList(),
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RemovedNodes = fromNodes.Except(toNodes).ToList(),
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UnchangedNodes = fromNodes.Intersect(toNodes).ToList()
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};
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var jsonOutputs = new List<string>();
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// Act - Serialize diff 10 times
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for (int i = 0; i < 10; i++)
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{
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var json = JsonSerializer.Serialize(diff, CanonicalJsonOptions);
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jsonOutputs.Add(json);
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}
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// Assert
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jsonOutputs.Distinct().Should().HaveCount(1,
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"diff serialization should be deterministic");
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_output.WriteLine($"Diff JSON: {jsonOutputs[0]}");
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}
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#endregion
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#region Diff Commutativity Tests
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[Fact]
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public void LineageDiff_ComputeDiff_IsCommutative()
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{
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// Arrange
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var graphA = CreateLineageGraphA();
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var graphB = CreateLineageGraphB();
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// Act - Compute diff both ways
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var diffAtoB = ComputeDiff(graphA, graphB);
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var diffBtoA = ComputeDiff(graphB, graphA);
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// Assert - Inverse operations should be symmetric
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diffAtoB.AddedNodes.Count.Should().Be(diffBtoA.RemovedNodes.Count);
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diffAtoB.RemovedNodes.Count.Should().Be(diffBtoA.AddedNodes.Count);
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_output.WriteLine($"A->B: +{diffAtoB.AddedNodes.Count} -{diffAtoB.RemovedNodes.Count}");
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_output.WriteLine($"B->A: +{diffBtoA.AddedNodes.Count} -{diffBtoA.RemovedNodes.Count}");
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}
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#endregion
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#region Golden File Tests
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[Fact]
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public void LineageGraph_MatchesGoldenOutput()
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{
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// Arrange - Create known graph structure
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var graph = CreateKnownLineageGraph();
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// Act
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var json = JsonSerializer.Serialize(graph, CanonicalJsonOptions);
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var hash = ComputeHash(json);
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// Assert - Hash should match golden value
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// This hash was computed from the first correct implementation
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// and should remain stable forever
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var goldenHash = "sha256:2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"; // Placeholder
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_output.WriteLine($"Computed hash: {hash}");
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_output.WriteLine($"Golden hash: {goldenHash}");
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_output.WriteLine($"JSON: {json}");
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// Note: Uncomment when golden hash is established
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// hash.Should().Be(goldenHash, "lineage graph output should match golden file");
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}
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#endregion
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#region Edge Case Tests
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[Fact]
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public void EmptyLineageGraph_ProducesDeterministicOutput()
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{
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// Arrange
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var emptyGraph = new LineageGraph(Array.Empty<LineageNode>(), Array.Empty<LineageEdge>());
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// Act
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var json1 = JsonSerializer.Serialize(emptyGraph, CanonicalJsonOptions);
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var json2 = JsonSerializer.Serialize(emptyGraph, CanonicalJsonOptions);
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var json3 = JsonSerializer.Serialize(emptyGraph, CanonicalJsonOptions);
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// Assert
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json1.Should().Be(json2);
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json1.Should().Be(json3);
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_output.WriteLine($"Empty graph JSON: {json1}");
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}
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[Fact]
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public void LineageGraph_WithIdenticalNodes_DeduplicatesDeterministically()
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{
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// Arrange - Duplicate nodes
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var nodes = new List<LineageNode>
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{
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new LineageNode("sha256:aaa", "v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:aaa", "v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:bbb", "v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z"))
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};
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var uniqueNodes = nodes.DistinctBy(n => n.Digest).ToList();
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var graph = new LineageGraph(uniqueNodes, Array.Empty<LineageEdge>());
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// Act
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var json = JsonSerializer.Serialize(graph, CanonicalJsonOptions);
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// Assert
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uniqueNodes.Should().HaveCount(2);
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json.Should().Contain("sha256:aaa");
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json.Should().Contain("sha256:bbb");
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_output.WriteLine($"Deduplicated JSON: {json}");
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}
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#endregion
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#region Helper Methods
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private static LineageGraph CreateComplexLineageGraph()
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{
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var nodes = new List<LineageNode>
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{
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new LineageNode("sha256:aaa", "app-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:bbb", "app-v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z")),
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new LineageNode("sha256:ccc", "app-v3", DateTimeOffset.Parse("2025-01-03T00:00:00Z")),
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new LineageNode("sha256:ddd", "lib-v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:eee", "lib-v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z"))
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};
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var edges = new List<LineageEdge>
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{
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new LineageEdge("sha256:aaa", "sha256:bbb", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:bbb", "sha256:ccc", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:ddd", "sha256:eee", LineageRelationship.DerivedFrom),
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new LineageEdge("sha256:aaa", "sha256:ddd", LineageRelationship.DependsOn),
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new LineageEdge("sha256:bbb", "sha256:eee", LineageRelationship.DependsOn)
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};
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return new LineageGraph(nodes, edges);
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}
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private static LineageGraph CreateKnownLineageGraph()
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{
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var nodes = new List<LineageNode>
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{
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new LineageNode("sha256:1111", "known-v1", DateTimeOffset.Parse("2025-01-01T12:00:00Z")),
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new LineageNode("sha256:2222", "known-v2", DateTimeOffset.Parse("2025-01-02T12:00:00Z"))
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};
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var edges = new List<LineageEdge>
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{
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new LineageEdge("sha256:1111", "sha256:2222", LineageRelationship.DerivedFrom)
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};
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return new LineageGraph(nodes, edges);
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}
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private static LineageGraph CreateLineageGraphA()
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{
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return new LineageGraph(
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new List<LineageNode>
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{
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new LineageNode("sha256:aaa", "v1", DateTimeOffset.Parse("2025-01-01T00:00:00Z")),
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new LineageNode("sha256:bbb", "v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z"))
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},
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new List<LineageEdge>
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{
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new LineageEdge("sha256:aaa", "sha256:bbb", LineageRelationship.DerivedFrom)
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});
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}
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private static LineageGraph CreateLineageGraphB()
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{
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return new LineageGraph(
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new List<LineageNode>
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{
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new LineageNode("sha256:bbb", "v2", DateTimeOffset.Parse("2025-01-02T00:00:00Z")),
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new LineageNode("sha256:ccc", "v3", DateTimeOffset.Parse("2025-01-03T00:00:00Z"))
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},
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new List<LineageEdge>
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{
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new LineageEdge("sha256:bbb", "sha256:ccc", LineageRelationship.DerivedFrom)
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});
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}
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private static LineageDiff ComputeDiff(LineageGraph from, LineageGraph to)
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{
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var addedNodes = to.Nodes.ExceptBy(from.Nodes.Select(n => n.Digest), n => n.Digest).ToList();
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var removedNodes = from.Nodes.ExceptBy(to.Nodes.Select(n => n.Digest), n => n.Digest).ToList();
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var unchangedNodes = from.Nodes.IntersectBy(to.Nodes.Select(n => n.Digest), n => n.Digest).ToList();
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return new LineageDiff
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{
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AddedNodes = addedNodes,
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RemovedNodes = removedNodes,
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UnchangedNodes = unchangedNodes
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};
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}
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private static string ComputeHash(string input)
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{
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var bytes = System.Text.Encoding.UTF8.GetBytes(input);
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var hash = System.Security.Cryptography.SHA256.HashData(bytes);
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return $"sha256:{Convert.ToHexString(hash).ToLowerInvariant()}";
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}
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#endregion
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#region Test Models
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private sealed record LineageGraph(
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IReadOnlyList<LineageNode> Nodes,
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IReadOnlyList<LineageEdge> Edges);
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private sealed record LineageNode(
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string Digest,
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string Version,
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DateTimeOffset CreatedAt);
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private sealed record LineageEdge(
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string From,
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string To,
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LineageRelationship Relationship);
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private enum LineageRelationship
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{
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DerivedFrom,
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VariantOf,
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DependsOn
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}
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private sealed class LineageDiff
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{
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public required IReadOnlyList<LineageNode> AddedNodes { get; init; }
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public required IReadOnlyList<LineageNode> RemovedNodes { get; init; }
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public required IReadOnlyList<LineageNode> UnchangedNodes { get; init; }
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}
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#endregion
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}
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Reference in New Issue
Block a user