}

    @Test
    public void test_escapeHtml_lessThan() {
        assertEquals("a &lt; b", chatClient.testEscapeHtml("a < b"));
    }

    @Test
    public void test_escapeHtml_greaterThan() {
        assertEquals("a &gt; b", chatClient.testEscapeHtml("a > b"));
    }

    @Test
    public void test_escapeHtml_allSpecialChars() {