@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);
}
