@Test
    void testEscapedFilter() {
        test("CN=Rees\\5C, John,OU=Tier3,DC=big,DC=com");
        test("(o=Parens R Us \\28for all your parenthetical needs\\29)");
        test("(cn=*\\2a*)");
        test("(filename=C:\\5cMyFile)");
        test("(bin=\\00\\00\\00\\04)");
        test("(sn=Lu\\c4\\8di\\c4\\87)");
        test("(1.3.6.1.4.1.1466.0=\\04\\02\\48\\69)");
    }
@author James Chen
        <p>
        TODO: Add tests for invalid filters.
turms-gateway/src/test/java/unit/im/turms/gateway/infra/ldap/FilterTest.java