}
    }

    // Test error message methods without parameters
    public void test_addErrorsFrontHeader() {
        String property = "testProperty";
        FessMessages result = messages.addErrorsFrontHeader(property);
        assertNotNull(result);
        assertSame(messages, result);
        assertTrue(messages.hasMessageOf(property));
    }

    public void test_addErrorsFrontFooter() {

     * <pre>
     * message:
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsFrontHeader(String property) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_front_header));
        return this;
    }

    /**