@Test
public void testIsEqual() {

    Assert.assertFalse(MathUtil.isEqual(-4f, 4f));
    Assert.assertTrue(MathUtil.isEqual(0.0f, -0.0f));
    Assert.assertTrue(MathUtil.isEqual(21f, 21f));
    Assert.assertFalse(MathUtil.isEqual(1f, 2f, 0.5f));
    Assert.assertTrue(MathUtil.isEqual(1, 2, 1));
}