// ensure no zombie entry remains
    cache.asMap().computeIfPresent(1, (key, value) -> null);
    assertThat(notifications).hasSize(1);
    CacheTesting.checkEmpty(cache);
  }

  public void testComputeIfPresent_error() {
    Cache<String, String> cache = CacheBuilder.newBuilder().build();
    cache.put(key, "1");
    assertThrows(
        Error.class,
        () ->
            cache
                .asMap()