assertEquals("Converter.identity()", stringIdentityConverter.toString());

    assertSame(Converter.identity(), Converter.identity());
  }

  public void testFrom() {
    Function<String, Integer> forward =
        new Function<String, Integer>() {
          @Override
          public Integer apply(String input) {
            return Integer.parseInt(input);
          }

  final Closeable mockCloseable = Mockito.mock(Closeable.class);

  @Override
  protected void tearDown() throws Exception {
    assertNoExpectedFailures();
    super.tearDown();
  }

  public void testFrom() throws Exception {
    ClosingFuture<String> closingFuture =
        ClosingFuture.from(executor.submit(Callables.returning(closeable1)))
            .transform(