assertFalse(predicate.apply(1));
    list.add(Predicates.alwaysTrue());
    assertFalse(predicate.apply(1));
  }

  /*
   * Tests for Predicates.equalTo(x).
   */

  public void testIsEqualTo_apply() {
    Predicate<@Nullable Integer> isOne = Predicates.equalTo(1);

    assertTrue(isOne.apply(1));
    assertFalse(isOne.apply(2));
    assertFalse(isOne.apply(null));
  }