Tip: Hibernate PersistenceException :

If you are seeing the following error "No Persistence provider for EntityManager named" and scratching your brains, ensure that the hibernate-entitymanager.jar is on the classpath.

Also you should have a META-INF/persistence.xml in your jars someplace.

Tip: Eclipse:: getTextContent() is undefined for Node/Element

In Eclipse, if you see the an error saying getTextContent() is undefined for Node/Element, then follow:
http://mergetag.com/the-method-gettextcontent-is-undefined-for-the-type-node/

Mockito return the value from the response

An example:
private HttpServletRequest request = mock(HttpServletRequest.class);
    private HttpServletResponse response = mock(HttpServletResponse.class);

    @Test
    public void testAuthz() throws Exception {
        AuthorizationEndpoint endpoint = new AuthorizationEndpoint();
        when(request.getParameter("response_type")).thenReturn(ResponseType.CODE.toString());
        when(request.getParameter("client_id")).thenReturn("test_id");
        when(request.getParameter("redirect_uri")).thenReturn("http://localhost");

        final ArrayList values = new ArrayList();
        doAnswer(new Answer