Refactor code structure and optimize performance across multiple modules

src/__Libraries/__Tests/StellaOps.TestKit.Tests/DeterminismManifestTests.cs

@@ -3,11 +3,13 @@ using StellaOps.Canonical.Json;
 using StellaOps.TestKit.Determinism;
 using Xunit;
 
+using StellaOps.TestKit;
 namespace StellaOps.TestKit.Tests;
 
 public sealed class DeterminismManifestTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void ToCanonicalBytes_WithValidManifest_ProducesDeterministicOutput()
     {
         // Arrange
@@ -21,7 +23,8 @@ public sealed class DeterminismManifestTests
         bytes1.Should().Equal(bytes2, "Same manifest should produce identical canonical bytes");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void ToCanonicalString_WithValidManifest_ProducesDeterministicString()
     {
         // Arrange
@@ -37,7 +40,8 @@ public sealed class DeterminismManifestTests
         json1.Should().NotContain("  ", "Canonical JSON should have no indentation");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void WriteToFile_AndReadFromFile_RoundTripsSuccessfully()
     {
         // Arrange
@@ -64,7 +68,8 @@ public sealed class DeterminismManifestTests
         }
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task WriteToFileAsync_AndReadFromFileAsync_RoundTripsSuccessfully()
     {
         // Arrange
@@ -91,7 +96,8 @@ public sealed class DeterminismManifestTests
         }
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void FromBytes_WithValidJson_DeserializesSuccessfully()
     {
         // Arrange
@@ -105,7 +111,8 @@ public sealed class DeterminismManifestTests
         deserialized.Should().BeEquivalentTo(manifest);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void FromString_WithValidJson_DeserializesSuccessfully()
     {
         // Arrange
@@ -119,7 +126,8 @@ public sealed class DeterminismManifestTests
         deserialized.Should().BeEquivalentTo(manifest);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void FromBytes_WithInvalidSchemaVersion_ThrowsInvalidOperationException()
     {
         // Arrange
@@ -134,7 +142,8 @@ public sealed class DeterminismManifestTests
             .WithMessage("*schema version*2.0*");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void TryReadFromFileAsync_WithNonExistentFile_ReturnsNull()
     {
         // Arrange
@@ -147,7 +156,8 @@ public sealed class DeterminismManifestTests
         result.Should().BeNull();
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void ReadFromFile_WithNonExistentFile_ThrowsFileNotFoundException()
     {
         // Arrange
@@ -160,7 +170,8 @@ public sealed class DeterminismManifestTests
         act.Should().Throw<FileNotFoundException>();
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void ComputeCanonicalHash_ProducesDeterministicHash()
     {
         // Arrange
@@ -175,7 +186,8 @@ public sealed class DeterminismManifestTests
         hash1.Should().MatchRegex("^[0-9a-f]{64}$", "Hash should be 64-character hex string");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CreateManifest_WithValidInputs_CreatesManifestWithCorrectHash()
     {
         // Arrange
@@ -216,7 +228,8 @@ public sealed class DeterminismManifestTests
         manifest.CanonicalHash.Value.Should().Be(expectedHash);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CreateManifestForJsonArtifact_WithValidInputs_CreatesManifestWithCanonicalHash()
     {
         // Arrange
@@ -255,7 +268,8 @@ public sealed class DeterminismManifestTests
         manifest.CanonicalHash.Value.Should().Be(expectedHash);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CreateManifest_WithInputStamps_IncludesInputStamps()
     {
         // Arrange
@@ -292,7 +306,8 @@ public sealed class DeterminismManifestTests
         manifest.Inputs.SourceCodeHash.Should().Be("789abc");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CreateManifest_WithReproducibilityMetadata_IncludesMetadata()
     {
         // Arrange
@@ -331,7 +346,8 @@ public sealed class DeterminismManifestTests
         manifest.Reproducibility.NormalizationRules.Should().ContainInOrder("UTF-8", "LF line endings", "sorted JSON keys");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CreateManifest_WithVerificationInfo_IncludesVerification()
     {
         // Arrange
@@ -368,7 +384,8 @@ public sealed class DeterminismManifestTests
         manifest.Verification.Baseline.Should().Be("tests/baselines/sbom-alpine-3.18.determinism.json");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void ManifestSerialization_WithComplexMetadata_PreservesAllFields()
     {
         // Arrange