assertEquals("maxKey should match", "test.max.only", annotation.maxKey());
    }

    // Test annotation with custom message
    @Test
    public void test_annotationWithCustomMessage() throws Exception {
        final Field field = CustomSizeTest.class.getDeclaredField("testFieldWithMessage");
        final CustomSize annotation = field.getAnnotation(CustomSize.class);

        assertEquals("message should be default", "{org.lastaflute.validator.constraints.UriType.message}", annotation.message());
    }

    // Test annotation with custom message
    @Test
    public void test_annotationWithCustomMessage() throws Exception {
        final Field field = UriTypeTest.class.getDeclaredField("testFieldWithMessage");
        final UriType annotation = field.getAnnotation(UriType.class);