@Test
    public void testSign() {
        assertEquals(-1, FastMath.sign(-2_147_483_647));
        assertEquals(1, FastMath.sign(1));
        assertEquals(0, FastMath.sign(0));
        assertEquals(0.0f, FastMath.sign(0.0f), 0.0f);
    }
Verifies that algorithms in {@link FastMath} are working correctly.

@author Kirill Vainer
jme3-core/src/test/java/com/jme3/math/FastMathTest.java