}
                }),
            executor);
    ListenableFuture<?> statusFuture = closingFuture.statusFuture();
    waiter.awaitStarted();
    assertThat(statusFuture.isDone()).isFalse();
    waiter.awaitReturned();
    assertThat(getUninterruptibly(statusFuture)).isNull();
  }

  public void testStatusFuture_failure() throws Exception {
    ClosingFuture<String> closingFuture =

    assertThat(new TypeToken<List<? extends Number>>() {}.isSupertypeOf(fieldType)).isTrue();
    assertThat(new TypeToken<List<? extends Iterable<?>>>() {}.isSupertypeOf(fieldType)).isFalse();
  }

  public void testWildcardCaptured_typeVariableDeclaresTypeBound_wildcardHasExplicitUpperBound()
      throws Exception {

                  }
                }),
            executor);
    ListenableFuture<?> statusFuture = closingFuture.statusFuture();
    waiter.awaitStarted();
    assertThat(statusFuture.isDone()).isFalse();
    waiter.awaitReturned();
    assertThat(getUninterruptibly(statusFuture)).isNull();
  }

  public void testStatusFuture_failure() throws Exception {
    ClosingFuture<String> closingFuture =

    assertThat(i.next()).isEqualTo(1);
    assertThat(i.hasNext()).isFalse();
  }

  public void testSingletonNullIteratorBasic() {
    Iterator<@Nullable Integer> i = singletonIterator(null);
    assertThat(i.hasNext()).isTrue();
    assertThat(i.next()).isEqualTo(null);
    assertThat(i.hasNext()).isFalse();
  }

  @GwtIncompatible // slow (~4s)