Matchers.java

public static <T extends ActionSupport> Matcher<T> hasActionMessage(final String messageText) {
  return new TypeSafeMatcher<T>() {

    public boolean matchesSafely(T action) {
      return action.getActionMessages().contains(messageText);
    }

    public void describeTo(Description description) {
      description.appendText("contains action message text '"+messageText+"'");
    }
  };
}