assertTrue(messages.hasMessageOf(property));
    }

    @Test
    public void test_addConstraintsNotNullMessage() {
        String property = "testProperty";
        FessMessages result = messages.addConstraintsNotNullMessage(property);
        assertNotNull(result);
        assertSame(messages, result);
        assertTrue(messages.hasMessageOf(property));
    }

    @Test

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

    /**