public void PipeLinkIsDeletedCorrectly() { var position = new Coordinate(1, 4); var connectingPosition = new Coordinate(2, 4); var edge = new CoordinatePair(position, connectingPosition); pipeLinks[new CoordinatePair(position, connectingPosition)] = mockBuilderObject.Object; objectTable.DeletePipeLink(edge); Assert.IsFalse(pipeLinks.ContainsKey(new CoordinatePair(position, connectingPosition))); }