* to the expected value on the message exchange
*/
protected void assertPredicate(String languageName, String expressionText, Exchange exchange, boolean expected) {
Language language = assertResolveLanguage(languageName);
Predicate predicate = language.createPredicate(expressionText);
assertNotNull(predicate, "No Predicate could be created for text: " + expressionText + " language: " + language);
assertPredicate(predicate, exchange, expected);
}