@Test
public void compareToTest() {

	Objective o1 = new Objective("obj1", Sign.MAX);
	Objective o11 = new Objective("obj1", Sign.MAX);
	Objective o2 = new Objective("obj2", Sign.MAX);
	Assert.assertEquals(0, o1.compareTo(o11));
	Assert.assertEquals(-1 * o1.compareTo(o2), o2.compareTo(o1));
	Assert.assertEquals(1, o1.compareTo(null));
}