@Test public void testScaleAdd() { final Vector2 vec1 = new Vector2(1, 1); final Vector2 vec2 = vec1.scaleAdd(2.0, new Vector2(1, 2), null); final Vector2 vec2B = vec1.scaleAdd(2.0, new Vector2(1, 2), new Vector2()); assertEquals(new Vector2(3.0, 4.0), vec2); assertEquals(new Vector2(3.0, 4.0), vec2B); vec1.scaleAddLocal(2.0, new Vector2(1, 2)); assertEquals(vec2, vec1); }