stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.Canonical.Json.Tests/CanonVersionTests.Hashing.cs

@@ -0,0 +1,57 @@
+using StellaOps.TestKit;
+using Xunit;
+
+namespace StellaOps.Canonical.Json.Tests;
+
+public partial class CanonVersionTests
+{
+    [Trait("Category", TestCategories.Unit)]
+    [Fact]
+    public void HashVersioned_DiffersFromLegacyHash()
+    {
+        var obj = new { foo = "bar", count = 42 };
+
+        var legacyHash = CanonJson.Hash(obj);
+        var versionedHash = CanonJson.HashVersioned(obj);
+
+        Assert.NotEqual(legacyHash, versionedHash);
+    }
+
+    [Trait("Category", TestCategories.Unit)]
+    [Fact]
+    public void HashVersionedPrefixed_DiffersFromLegacyHashPrefixed()
+    {
+        var obj = new { foo = "bar", count = 42 };
+
+        var legacyHash = CanonJson.HashPrefixed(obj);
+        var versionedHash = CanonJson.HashVersionedPrefixed(obj);
+
+        Assert.NotEqual(legacyHash, versionedHash);
+        Assert.StartsWith("sha256:", versionedHash);
+        Assert.StartsWith("sha256:", legacyHash);
+    }
+
+    [Trait("Category", TestCategories.Unit)]
+    [Fact]
+    public void HashVersioned_SameInput_ProducesSameHash()
+    {
+        var obj = new { foo = "bar", count = 42 };
+
+        var hash1 = CanonJson.HashVersioned(obj);
+        var hash2 = CanonJson.HashVersioned(obj);
+
+        Assert.Equal(hash1, hash2);
+    }
+
+    [Trait("Category", TestCategories.Unit)]
+    [Fact]
+    public void HashVersioned_DifferentVersions_ProduceDifferentHashes()
+    {
+        var obj = new { foo = "bar" };
+
+        var hashV1 = CanonJson.HashVersioned(obj, "stella:canon:v1");
+        var hashV2 = CanonJson.HashVersioned(obj, "stella:canon:v2");
+
+        Assert.NotEqual(hashV1, hashV2);
+    }
+}