### Question:
ValidURLPredicate implements Predicate<String> { @Override public boolean test(String input) { return input != null && isValidAbsoluteUrl(input); }  @Override boolean test(String input);  }### Answer:
@Test public void test() { ValidURLPredicate predicate = new ValidURLPredicate(); Assert.assertFalse(predicate.test(null)); Assert.assertFalse(predicate.test("")); Assert.assertFalse(predicate.test(" ")); Assert.assertFalse(predicate.test("a")); Assert.assertFalse(predicate.test("http: Assert.assertFalse(predicate.test("http: Assert.assertFalse(predicate.test("invalid.com")); Assert.assertTrue(predicate.test("http: Assert.assertTrue(predicate.test("http: Assert.assertTrue(predicate.test("http: }