@Test
public void testNotNull() throws Exception {
Predicate<Object> notNull = Predicates.notNull();
assertTrue(notNull.test("Hallo"));
assertFalse(notNull.test(null));
}
@Test
public void testIsNull() throws Exception {
Predicate<Object> isNull = Predicates.isNull();
assertTrue(isNull.test(null));
assertFalse(isNull.test("test"));
}
@Test
public void testAlwaysTrue() {
Predicate<Object> alwaysTrue = Predicates.alwaysTrue();
assertTrue(alwaysTrue.test(null));
assertTrue(alwaysTrue.test("Hallo"));
assertTrue(alwaysTrue.test(55l));
}
@Test
public void testAlwaysFalse() {
Predicate<Object> alwaysFalse = Predicates.alwaysFalse();
assertFalse(alwaysFalse.test(null));
assertFalse(alwaysFalse.test("FooBar"));
assertFalse(alwaysFalse.test(66d));
}