### Question:
RequiredDataAdvice implements MethodBeforeAdvice { protected static boolean isOpenmrsObjectCollection(Object arg) { if (arg instanceof Collection) { Collection<?> col = (Collection<?>) arg; return !col.isEmpty() && col.iterator().next() instanceof OpenmrsObject; } return false; }  @Override @SuppressWarnings("unchecked") void before(Method method, Object[] args, Object target); static void recursivelyHandle(Class<H> handlerType, OpenmrsObject openmrsObject,
	        String reason); @SuppressWarnings("unchecked") static void recursivelyHandle(Class<H> handlerType, OpenmrsObject openmrsObject,
	        User currentUser, Date currentDate, String other, List<OpenmrsObject> alreadyHandled);  }### Answer:
@Test public void isOpenmrsObjectCollection_shouldReturnFalseIfFieldIsCollectionOfOtherObjects() throws Exception { Assert.assertFalse(RequiredDataAdvice.isOpenmrsObjectCollection(ClassWithOtherFields.class .getDeclaredField("locales"))); List<String> list = new LinkedList<>(); list.add("Test"); Assert.assertFalse(RequiredDataAdvice.isOpenmrsObjectCollection(list)); }
@Test public void isOpenmrsObjectCollection_shouldReturnFalseIfFieldIsCollectionOfParameterizedType() throws Exception { Assert.assertFalse(RequiredDataAdvice.isOpenmrsObjectCollection(ClassWithOtherFields.class .getDeclaredField("nestedGenericProperty"))); }
@Test public void isOpenmrsObjectCollection_shouldReturnFalseIfFieldIsNotACollection() throws Exception { Assert.assertFalse(RequiredDataAdvice.isOpenmrsObjectCollection(ClassWithOtherFields.class.getDeclaredField("id"))); }
@Test public void isOpenmrsObjectCollection_shouldReturnTrueIfClassIsOpenmrsObjectList() throws Exception { List<Location> locations = new ArrayList<>(); Location location = new Location(); locations.add(location); Assert.assertTrue(RequiredDataAdvice.isOpenmrsObjectCollection(locations)); }
@Test public void isOpenmrsObjectCollection_shouldReturnTrueIfClassIsOpenmrsObjectSet() throws Exception { Set<Location> locations = new HashSet<>(); Location location = new Location(); locations.add(location); Assert.assertTrue(RequiredDataAdvice.isOpenmrsObjectCollection(locations)); }
@Test public void isOpenmrsObjectCollection_shouldReturnFalseIfCollectionIsEmptyRegardlessOfTypeHeld() throws Exception { Set<Location> locations = new HashSet<>(); Assert.assertFalse(RequiredDataAdvice.isOpenmrsObjectCollection(locations)); }