}

  public void testXmlAttributeEscaper() throws Exception {
    CharEscaper xmlAttributeEscaper = (CharEscaper) XmlEscapers.xmlAttributeEscaper();
    assertBasicXmlEscaper(xmlAttributeEscaper, true, true);
    // Test quotes are escaped.
    assertThat(xmlAttributeEscaper.escape("\"test\"")).isEqualTo(""test"");
    assertThat(xmlAttributeEscaper.escape("'test'")).isEqualTo("'test'");
    // Test all escapes

  }

  public void testXmlAttributeEscaper() throws Exception {
    CharEscaper xmlAttributeEscaper = (CharEscaper) XmlEscapers.xmlAttributeEscaper();
    assertBasicXmlEscaper(xmlAttributeEscaper, true, true);
    // Test quotes are escaped.
    assertThat(xmlAttributeEscaper.escape("\"test\"")).isEqualTo(""test"");
    assertThat(xmlAttributeEscaper.escape("'test'")).isEqualTo("'test'");
    // Test all escapes

   * <p><b>Note:</b> Double and single quotes are not escaped, so it is <b>not safe</b> to use this
   * escaper to escape attribute values. Use {@link #xmlContentEscaper} if the output can appear in
   * element content or {@link #xmlAttributeEscaper} in attribute values.
   *
   * <p>This escaper substitutes {@code 0xFFFD} for non-whitespace control characters and the
   * character values {@code 0xFFFE} and {@code 0xFFFF} which are not permitted in XML. For more