@Test(expected = NullPointerException.class) public void checkNullPointerEx() { Vector2D v = null; System.out.println(v.length()); }
@Test public void defaultVectorShouldHaveZeroLength() { Vector2D v = new Vector2D(); Assert.assertEquals(0, v.length(), EPS); }
@Test public void vectorLengthShouldBeSQRTOfSumOfSqrsOfXY() { Vector2D v = new Vector2D(3, 4); Assert.assertEquals(5, v.length(), EPS); }