@Test
public void hashCodeTest() {

	String name = "obj1";
	Objective o1 = new Objective(name, Sign.MAX);
	Objective o2 = new Objective(name, Sign.MAX);
	Objective o3 = new Objective(null, Sign.MAX);
	Objective o4 = new Objective(name, null);
	Assert.assertEquals(o1.hashCode(), o2.hashCode());
	Assert.assertNotEquals(o1.hashCode(), o3.hashCode());
	Assert.assertNotEquals(o1.hashCode(), o4.hashCode());
}