add test for maintaining references in the scene

Author: vkovec

com.unity.formats.fbx.tests/Tests/FbxTests/ConvertToModelTest.cs

@@ -128,6 +128,56 @@ protected void AssertSameMeshesAndMaterials(GameObject expectedHierarchy, GameOb
             }
         }
 
+        [Test]
+        public void TestReferencesInScene()
+        {
+            // test that references that scene objects hold to the converted object
+            // are maintained
+            var a = GameObject.CreatePrimitive(PrimitiveType.Cube);
+            var b = GameObject.CreatePrimitive(PrimitiveType.Sphere);
+            b.transform.SetParent(a.transform);
+
+            var c = new GameObject();
+            var reference = c.AddComponent<ReferenceComponent>();
+            reference.m_goList = new GameObject[] { a, b };
+            reference.m_collider = a.GetComponent<BoxCollider>();
+            reference.m_transform = b.transform;
+
+            var fbxPath = GetRandomFbxFilePath();
+
+            // Convert it to a prefab
+            var prefab = ConvertToNestedPrefab.Convert(a,
+                fbxFullPath: fbxPath, prefabFullPath: Path.ChangeExtension(fbxPath, "prefab"));
+            Assert.That(prefab);
+            Assert.That(!a);
+
+            var newA = prefab;
+            var newB = prefab.transform.GetChild(0).gameObject;
+
+            Assert.That(reference.m_goList.Length, Is.EqualTo(2));
+            Assert.That(reference.m_goList[0], Is.EqualTo(newA));
+            Assert.That(reference.m_goList[1], Is.EqualTo(newB));
+            Assert.That(reference.m_collider, Is.EqualTo(newA.GetComponent<BoxCollider>()));
+            Assert.That(reference.m_transform, Is.EqualTo(newB.transform));
+
+            // Test undo and redo still maintains the right references
+            Undo.PerformUndo();
+
+            Assert.That(reference.m_goList.Length, Is.EqualTo(2));
+            Assert.That(reference.m_goList[0], Is.EqualTo(a));
+            Assert.That(reference.m_goList[1], Is.EqualTo(b));
+            Assert.That(reference.m_collider, Is.EqualTo(a.GetComponent<BoxCollider>()));
+            Assert.That(reference.m_transform, Is.EqualTo(b.transform));
+
+            Undo.PerformRedo();
+
+            Assert.That(reference.m_goList.Length, Is.EqualTo(2));
+            Assert.That(reference.m_goList[0], Is.EqualTo(newA));
+            Assert.That(reference.m_goList[1], Is.EqualTo(newB));
+            Assert.That(reference.m_collider, Is.EqualTo(newA.GetComponent<BoxCollider>()));
+            Assert.That(reference.m_transform, Is.EqualTo(newB.transform));
+        }
+
         [Test]
         public void TestReferences()
         {