Test two entries with same name.

Author: sharpjs

DependencyQueue.Tests/DependencyQueueTests.cs

@@ -130,6 +130,19 @@ public void Enqueue_InterdependentEntityNetwork()
         queue.Should().HaveTopic("b1", providedBy: Items(entryB1));
     }
 
+    [Test]
+    public void Enqueue_DuplicateEntry()
+    {
+        var entryA0 = Entry("a");
+        var entryA1 = Entry("a");
+
+        using var queue = Queue(entryA0, entryA1);
+
+        queue.Should().HaveReadyEntries(entryA0, entryA1);
+        queue.Should().HaveTopicCount(1);
+        queue.Should().HaveTopic("a", providedBy: Items(entryA0, entryA1));
+    }
+
     [Test]
     public void Validate_Empty()
     {