JUnit Tests for Liferay MVCPortlet using PowerMock - unit-testing

Question

Im trying to make JUnit Test using PowerMock, but I have one problem. Here is my code:
public class MyGreeting extends MVCPortlet {
public static final String GREETING="greeting";
private static final String DEFAULT_GREETING="MY DEFAULT GREETING MESSAGE";
private static final Log _log = LogFactoryUtil.getLog(MyGreeting.class.getName());
#Override
public void render(RenderRequest req,RenderResponse res)
throws IOException, PortletException {
PortletPreferences prefs = req.getPreferences();
req.setAttribute(GREETING, prefs.getValue(GREETING, DEFAULT_GREETING));
super.render(req,res);
}
And I need to make JUnit test. I created another test package, new MyGreetingTest.java file, and come up to this code:
public class MyGreetingTest extends Mockito{
#BeforeClass
public static void setUpBeforeClass() throws Exception {
}
#AfterClass
public static void tearDownAfterClass() throws Exception {
}
private MyGreeting portlet;
#Before
public void setUp() throws Exception {
portlet = new MyGreeting();
}
#After
public void tearDown() throws Exception {
}
#Mock
public RenderRequest request = mock(RenderRequest.class);
#Mock
PortletPreferences preferences = mock(PortletPreferences.class);
#Test
public final void renderTest() throws IOException, PortletException {
when(request.getPreferences()).thenReturn(preferences);
when(preferences.getValue(MyGreeting.GREETING, null)).thenReturn(value);
portlet.render(request, null);
String result = request.getAttribute(MyGreeting.GREETING).toString();
assertEquals(result, value);
}
But I have NullPointerException, because we can't apply getAttribute method to mock-request. Could you please tell me how to solve this problem? How can I test method with getAttribute method using Mockito?

Answer 1

I think you need to mock your method
Stock stock = mock(Stock.class);
when(stock.getPrice()).thenReturn(100.00); // Mock implementation
when(stock.getValue()).thenCallRealMethod(); // Real implementation