Updated unit tests to expect Topic.Id exception

JeremyCaney · JeremyCaney · commit 2f75e8b3ae40 · 2020-12-17T16:36:54.000-08:00
In a previous commit, I updated `Topic.Id` to throw an `InvalidOperationException` if a consumer attempted to change the `Id` (25bdeb4). I failed, however, to update the unit tests validating the default behavior. This commit resolves that.
diff --git a/OnTopic.Tests/TopicTest.cs b/OnTopic.Tests/TopicTest.cs
@@ -56,7 +56,7 @@ public void Create_ContentType_ReturnsDerivedTopic() {
     ///   Creates a topic using the factory method, and ensures that the ID cannot be modified.
     /// </summary>
     [TestMethod]
-    [ExpectedException(typeof(ArgumentException), "Topic permitted the ID to be reset; this should never happen.")]
+    [ExpectedException(typeof(InvalidOperationException), "Topic permitted the ID to be reset; this should never happen.")]
     public void Id_ChangeValue_ThrowsArgumentException() {
 
       var topic                 = TopicFactory.Create("Test", "ContentTypeDescriptor", 123);
