assertThat(anyOf("ab").trimTrailingFrom("abacatbab")).isEqualTo("abacat");
  }

  private void doTestTrimTrailingFrom(String in, String out) {
    // Try a few different matchers which all match '-' and not 'x'
    assertThat(is('-').trimTrailingFrom(in)).isEqualTo(out);
    assertThat(is('-').or(is('#')).trimTrailingFrom(in)).isEqualTo(out);
    assertThat(isNot('x').trimTrailingFrom(in)).isEqualTo(out);