need help in writing junit test case for below code.

[SudarshanV1]

public class CanonicalURL extends WCMUsePojo {

public LinkCreator linkCreatorUtil;

public String path;

@Override

public void activate() throws Exception {

linkCreatorUtil = getSlingScriptHelper().getService(LinkCreator.class);

path = get("path", String.class);

if (path == null) {

path = getCurrentPage().getPath();

}

}
can some one help in writing junit test case for this?
because mocking getSlingScriptHelper() is not working.

lenient().when(wcmUsePojo.getSlingScriptHelper()).thenReturn(slingScriptHelper);

lenient().when(slingScriptHelper.getService(LinkCreator.class)).thenReturn(linkCreator);

[SudarshanV1]

java.lang.NullPointerException: Cannot invoke "javax.script.Bindings.get(Object)" because "this.bindings" is null
at com.adobe.cq.sightly.WCMUsePojo.get(WCMUsePojo.java:110)
at com.adobe.cq.sightly.WCMUsePojo.getSlingScriptHelper(WCMUsePojo.java:283)
at com.morganstanley.mscommons.core.CanonicalURLTest.testActivate_WithPath(CanonicalURLTest.java:58)


error im getting while mocking

[arunpatidar]

Hi @SudarshanV1 

Please check examples here

https://github.com/arunpatidar02/com.aemlab.junitapp/tree/master/core/src/test/java/com/aemlab/junit... 

[giuseppebag]

You may find the following links useful:

https://exadel.com/news/aem-tip-junit-tests-for-wcmusepojo-objects/ 

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/wcmusepojo-aem-context-jun... 

[Mahedi_Sabuj · Accepted solution]

You can mock getSlingScriptHelper like below:

@Mock
private Bindings bindings;
@Mock
private SlingScriptHelper slingScriptHelper;

@BeforeEach
void setUp() {
  Mockito.when(bindings.get("sling")).thenReturn(slingScriptHelper);
  Mockito.when(slingScriptHelper.getService(LinkCreator.class))
    .thenReturn(linkCreator);

  canonicalURL.init(bindings);
}

[konstantyn_diachenko]

Hi @SudarshanV1 ,

Rely on AEM Context while writing unit tests. https://experienceleague.adobe.com/en/docs/experience-manager-learn/getting-started-wknd-tutorial-de... 

@ExtendWith({ AemContextExtension.class, MockitoExtension.class })
class YourTest {
    private final AemContext aemContext = new AemContext();
    
   @BeforeEach
   void init() {
       SlingBindings bindings = (SlingBindings) request.getAttribute(SlingBindings.class.getName());

      CanonicalURL model = new CanonicalURL();
      model.init(bindings);
   }
}

 Best regards,

Kostiantyn Diachenko.

[kautuk_sahni]

@SudarshanV1 Did you find the suggestions helpful? Please let us know if you need more information. If a response worked, kindly mark it as correct for posterity; alternatively, if you found a solution yourself, we’d appreciate it if you could share it with the community. Thank you!