Question

Below is the code I am trying to test, but getting null pointer exception on entityManager.find coz entityManager = null. Any suggestions?

@Name("UserProfileConverter")
@BypassInterceptors
@Converter(forClass= UserProfile.class)
public class UserProfileConverter implements javax.faces.convert.Converter {

    @Logger
    private static Log logger;

    public Object getAsObject(FacesContext arg0, UIComponent uiComponent, String s) {
           EntityManager entityManager = (EntityManager) Component.getInstance("entityManager");

        UserProfile p;

        if(s == null || s.equals("null")) {
            return null;
        } else {
            try {
                long i = Long.parseLong(s);
                return entityManager.find(UserProfile.class, i);
            } catch (NumberFormatException e) {
                logger.error(e);
            } catch (SecurityException e) {
                logger.error(e);
            }
        }

        return null;
    }

    public String getAsString(FacesContext context, UIComponent uiComponetn, Object arg2) {
        return ((CsaRole)arg2).getCsaRoleId() + "";
    }

}

Here is my test class..

public class UserProfileConverterTest extends SeamTest {

    private UserProfileConverter converter;
      private FacesContext mockFacesContext;
      private UIComponent mockUiComponent;

      private final static Logger logger = Logger.getLogger(UserProfileConverterTest.class);

      @BeforeClass
      public void setup() {
          converter = new UserProfileConverter();
      }
      @Test
      public void testGetAsObject()
              throws Exception {
              new ComponentTest() {

              @Override
              protected void testComponents() throws Exception {

              String value =   "11111111111";
              converter.getAsObject(mockFacesContext, mockUiComponent, value);

              }
          }.run();
      }


}

Answer 1

public class UserProfileConverterTest extends SeamTest {

EntityManager mockEntityManager;
private UserProfileConverter converter;
UIComponent mockUiComponent = null;
MockFacesContext mockFacesContext = null;

@BeforeClass
public void setup() {
    converter = new CsaUserProfileConverter();
    mockEntityManager = EasyMock.createMock(EntityManager.class);
}


class BaseComponentTest extends ComponentTest {

    protected void testComponents() throws Exception {

    ScopeType.EVENT.getContext().set("entityManager", mockEntityManager);
    }
}

@Test
public void testGetAsObject() throws Exception {
    new BaseComponentTest() {
        protected void testComponents() throws Exception {
            super.testComponents();

        UserProfile expectedResult = new UserProfile();
        EasyMock.expect(mockEntityManager.find(UserProfile.class,1L)).andReturn(expectedResult);


        //Replay Mock 
        EasyMock.replay(mockEntityManager);

        Object target = converter.getAsObject(mockFacesContext,mockUiComponent,"1");
        Assert.assertEquals(expectedResult, target);

        //Verify the Mock 
        EasyMock.verify(mockEntityManager);

        }
    }.run();
}