cache.getUnchecked("a");
      cache.getUnchecked("b");
      cache.getUnchecked("c");
      cache.invalidateAll();
      checkEmpty(cache);
    }
  }


  public void testEquals_null() {
    for (LoadingCache<Object, Object> cache : caches()) {
      assertThat(cache.equals(null)).isFalse();
    }
  }

  public void testEqualsAndHashCode_different() {