Refactor code structure for improved readability and maintainability; optimize performance in key functions.

tests/unit/StellaOps.AuditPack.Tests/AuditPackReplayerTests.cs

@@ -0,0 +1,61 @@
+namespace StellaOps.AuditPack.Tests;
+
+using StellaOps.AuditPack.Models;
+using StellaOps.AuditPack.Services;
+
+[Trait("Category", "Unit")]
+public class AuditPackReplayerTests
+{
+    [Fact]
+    public async Task Replay_ValidPack_ProducesResult()
+    {
+        // Arrange
+        var pack = CreateTestPack();
+        var importResult = new ImportResult
+        {
+            Success = true,
+            Pack = pack,
+            ExtractDirectory = Path.GetTempPath()
+        };
+
+        var replayer = new AuditPackReplayer();
+
+        // Act
+        var result = await replayer.ReplayAsync(importResult);
+
+        // Assert
+        result.Success.Should().BeTrue();
+        result.OriginalVerdictDigest.Should().NotBeNullOrEmpty();
+        result.ReplayedVerdictDigest.Should().NotBeNullOrEmpty();
+    }
+
+    [Fact]
+    public async Task Replay_InvalidImport_Fails()
+    {
+        // Arrange
+        var importResult = new ImportResult { Success = false };
+        var replayer = new AuditPackReplayer();
+
+        // Act
+        var result = await replayer.ReplayAsync(importResult);
+
+        // Assert
+        result.Success.Should().BeFalse();
+        result.Error.Should().Contain("Invalid import");
+    }
+
+    private static AuditPack CreateTestPack()
+    {
+        return new AuditPack
+        {
+            PackId = "test-pack",
+            Name = "Test Pack",
+            CreatedAt = DateTimeOffset.UtcNow,
+            RunManifest = new RunManifest("scan-1", DateTimeOffset.UtcNow),
+            EvidenceIndex = new EvidenceIndex([]),
+            Verdict = new Verdict("verdict-1", "pass"),
+            OfflineBundle = new BundleManifest("bundle-1", "1.0"),
+            Contents = new PackContents()
+        };
+    }
+}