public static void testChanged() { Address a = null, b = null; assert !Util.different(a, b); a = Util.createRandomAddress("A"); assert Util.different(a, b); assert Util.different(b, a); b = Util.createRandomAddress("B"); assert Util.different(a, b); assert Util.different(b, a); b = a; assert !Util.different(a, b); assert !Util.different(b, a); a = null; assert Util.different(a, b); assert Util.different(b, a); }