stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/__Tests/StellaOps.TestKit.Tests/ObservabilityContractTests.LogContractAssert.cs

@@ -0,0 +1,75 @@
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+using FluentAssertions;
+using Microsoft.Extensions.Logging;
+using StellaOps.TestKit.Observability;
+using Xunit;
+
+namespace StellaOps.TestKit.Tests;
+
+public sealed partial class ObservabilityContractTests
+{
+    [Fact]
+    public void HasRequiredFields_AllPresent_NoException()
+    {
+        var record = new CapturedLogRecord
+        {
+            LogLevel = LogLevel.Information,
+            Message = "Test message",
+            StateValues = new Dictionary<string, object?>
+            {
+                ["CorrelationId"] = "abc-123",
+                ["TenantId"] = "acme"
+            }
+        };
+
+        var act = () => LogContractAssert.HasRequiredFields(record, "CorrelationId", "TenantId");
+
+        act.Should().NotThrow();
+    }
+
+    [Fact]
+    public void HasRequiredFields_Missing_ThrowsContractViolation()
+    {
+        var record = new CapturedLogRecord
+        {
+            LogLevel = LogLevel.Information,
+            Message = "Test message",
+            StateValues = new Dictionary<string, object?>
+            {
+                ["CorrelationId"] = "abc-123"
+            }
+        };
+
+        var act = () => LogContractAssert.HasRequiredFields(record, "CorrelationId", "MissingField");
+
+        act.Should().Throw<ContractViolationException>()
+            .WithMessage("*MissingField*");
+    }
+
+    [Fact]
+    public void NoSensitiveData_Clean_NoException()
+    {
+        var records = new[]
+        {
+            new CapturedLogRecord
+            {
+                LogLevel = LogLevel.Information,
+                Message = "User logged in successfully",
+                StateValues = new Dictionary<string, object?>
+                {
+                    ["UserId"] = "user-123"
+                }
+            }
+        };
+
+        var piiPatterns = new[]
+        {
+            new Regex(@"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b")
+        };
+
+        var act = () => LogContractAssert.NoSensitiveData(records, piiPatterns);
+
+        act.Should().NotThrow();
+    }
+}