}

  public void testMarkNotSupported() {
    counter = new CountingInputStream(new UnmarkableInputStream());

    IOException expected = assertThrows(IOException.class, () -> counter.reset());
    assertThat(expected).hasMessageThat().isEqualTo("Mark not supported");
  }

  private static class UnmarkableInputStream extends InputStream {
    @Override
    public int read() throws IOException {
      return 0;