public IEnumerator CreateAndDestroyOperationComponent_Undo_OperationExists()
{
var scene = TestUtility.defaultScene;
var operation = TestUtility.CreateGameObjectWithUndoableOperationComponent();
var operationGameObject = operation.gameObject;
Assert.AreEqual(0, CSGManager.TreeBranchCount, "Expected 0 TreeBranches to Exist");
Assert.AreEqual(0, CSGManager.TreeNodeCount, "Expected 0 TreeNodes to Exist");
Undo.FlushUndoRecordObjects();
Undo.IncrementCurrentGroup();
yield return(null);
Assert.AreEqual(1, CSGManager.TreeBranchCount, "Expected 1 TreeBranch to Exist");
Assert.AreEqual(2, CSGManager.TreeNodeCount, "Expected 2 TreeNodes to Exist");
Undo.DestroyObjectImmediate(operation);
yield return(null);
Assert.True(operationGameObject);
Assert.False(operation);
Assert.AreEqual(0, CSGManager.TreeBranchCount, "Expected 0 TreeBranches to Exist");
Assert.AreEqual(0, CSGManager.TreeNodeCount, "Expected 0 TreeNodes to Exist");
Assert.AreEqual(0, ChiselNodeHierarchyManager.RootCount(scene));
Undo.PerformUndo();
operation = operationGameObject.GetComponent <ChiselOperation>();
yield return(null);
Assert.True(operationGameObject);
Assert.True(operation);
Assert.AreEqual(1, CSGManager.TreeBranchCount, "Expected 1 TreeBranch to Exist");
Assert.AreEqual(2, CSGManager.TreeNodeCount, "Expected 2 TreeNodes to Exist");
Assert.AreEqual(1, ChiselNodeHierarchyManager.RootCount(scene));
}
