@Test
public void testUnsupportedTypes() {

    Type sourceType = typeWithFQN( JAVA_LANG_STRING );
    Type targetType = typeWithFQN( JAVA_LANG_STRING );
    DateFormatValidator dateFormatValidator = DateFormatValidatorFactory.forTypes( sourceType, targetType );
    assertThat( dateFormatValidator.validate( "XXXX" ).isValid() ).isTrue();
}