// Test quotes are escaped.
    assertThat(xmlAttributeEscaper.escape("\"test\"")).isEqualTo(""test"");
    assertThat(xmlAttributeEscaper.escape("'test'")).isEqualTo("'test'");
    // Test all escapes
    assertThat(xmlAttributeEscaper.escape("a\"b<c>d&e\"f'"))
        .isEqualTo("a&quot;b&lt;c&gt;d&amp;e&quot;f&apos;");
    // Test '\t', '\n' and '\r' are escaped.

    // Test quotes are escaped.
    assertThat(xmlAttributeEscaper.escape("\"test\"")).isEqualTo(""test"");
    assertThat(xmlAttributeEscaper.escape("'test'")).isEqualTo("'test'");
    // Test all escapes
    assertThat(xmlAttributeEscaper.escape("a\"b<c>d&e\"f'"))
        .isEqualTo("a&quot;b&lt;c&gt;d&amp;e&quot;f&apos;");
    // Test '\t', '\n' and '\r' are escaped.

     */
    private String escapeHtml(final String text) {
        if (text == null) {
            return "";
        }
        return text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\"", "&quot;").replace("'", "&#39;");
    }

    /**
     * Checks if the renderer is properly initialized.
     *
     * @return true if initialized
     */
    public boolean isInitialized() {

        if (text == null || text.isEmpty()) {
            return "";
        }
        return text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\"", "&quot;").replace("'", "&#39;");
    }

 * the queue the shortest time. New elements are inserted at the tail of the queue, and the queue
 * retrieval operations obtain elements at the head of the queue.
 *
 * <p>This is a classic &quot;bounded buffer&quot;, in which a fixed-sized array holds elements
 * inserted by producers and extracted by consumers. Once created, the capacity cannot be increased.

    }

    @Test
    public void test_htmlContent_withSpecialCharacters() {
        final ChatMessage message = new ChatMessage();
        final String htmlContent = "<p>Special chars: &amp; &lt; &gt; &quot;</p>";

        message.setHtmlContent(htmlContent);

        assertEquals(htmlContent, message.getHtmlContent());
    }

    @Test
    public void test_htmlContent_withUnicode() {

 * the queue the shortest time. New elements are inserted at the tail of the queue, and the queue
 * retrieval operations obtain elements at the head of the queue.
 *
 * <p>This is a classic &quot;bounded buffer&quot;, in which a fixed-sized array holds elements
 * inserted by producers and extracted by consumers. Once created, the capacity cannot be increased.

        assertEquals("a > b", chatClient.testEscapeHtml("a > b"));
    }

    @Test
    public void test_escapeHtml_allSpecialChars() {
        assertEquals("&amp;&lt;&gt;&quot;&#39;", chatClient.testEscapeHtml("&<>\"'"));
    }

    @Test
    public void test_escapeHtml_scriptTag() {

        assertTrue(html.contains("<title>Title with &lt;script&gt;alert(&#39;xss&#39;)&lt;/script&gt;</title>"));
        assertTrue(html.contains("Content with &amp; &lt; &gt; &quot; &#39;"));
        assertFalse(html.contains("<script>"));
    }

    @Test
    public void test_buildHtml_excludeFields() {
        final Map<String, Object> source = new LinkedHashMap<>();

     */
    protected String escapeHtml(final String text) {
        if (text == null) {
            return "";
        }
        return text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\"", "&quot;").replace("'", "&#39;");
    }

    /**
     * Gets the maximum number of history messages to retain.
     *
     * @return the maximum number of history messages
     */