added moq to tests and dedicated tests for ChangeEvent

Author: joshika39

idou.Core.Tests/Domain/ChangeEventTests.cs

@@ -0,0 +1,27 @@
+using idou.Core.Domain;
+using idou.Core.Domain.Enums;
+
+namespace idou.Core.Tests.Domain;
+
+public class ChangeEventTests
+{
+    [Fact]
+    public void ChangeEvent_Creation_Works()
+    {
+        var upsertMode = ChangeOperation.Upsert;
+        var offset = DateTimeOffset.UtcNow;
+
+        var changeEvent = new ChangeEvent(offset)
+        {
+            Operation = upsertMode,
+            Key = new EntityKey("TestKey"),
+            Type = new EntityType("TestType")
+        };
+
+        Assert.NotNull(changeEvent);
+        Assert.Equal(upsertMode, changeEvent.Operation);
+        Assert.Equal("TestKey", changeEvent.Key.Value);
+        Assert.Equal("TestType", changeEvent.Type.ToString());
+        Assert.Equal(offset, changeEvent.Timestamp);
+    }
+}

idou.Core.Tests/idou.Core.Tests.csproj

@@ -10,6 +10,7 @@
     <ItemGroup>
         <PackageReference Include="coverlet.collector" Version="6.0.4"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1"/>
+        <PackageReference Include="Moq" Version="4.20.72" />
         <PackageReference Include="xunit" Version="2.9.3"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4"/>
     </ItemGroup>