@Test
public void testUseFrameworkDefinedDefaultMessage() throws Exception {

	String expected = "Field is required.";
	final Field annotatedElement = this.getClass().getDeclaredField("t2_str");
	final Annotation annotation = annotatedElement.getAnnotation(NotNull.class);
	final Map<String, Object> actual = this.testee.generateFrom(annotatedElement, annotation);
	Assert.assertEquals(expected, actual.get("message"));
}