@Test
public void testAnd() {

	assertEquals(10, Ops.and(null, 1, 10));
	assertEquals(1, Ops.and(null, 10, 1));
	assertEquals(10, Ops.and(null, 10, 10));

	assertEquals(null, Ops.and(null, null, 10));
	assertEquals(0, Ops.and(null, 0, 10));
	assertEquals(null, Ops.and(null, 10, null));
	assertEquals(0, Ops.and(null, 10, 0));
}