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Uppari_Ramesh
Uppari_Ramesh
New Participant
June 30, 2023
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Junit for AccessControlUtils methods | Cannot read the array length because "<local4>" is null

  • June 30, 2023
  • 4 replies
  • 3881 views

Hi Everyone,

 

In my junit how can I pass this below line 

JackrabbitAccessControlList acl = AccessControlUtils.getAccessControlList(accessControlManager, "path");

 

at this line my junit is  getting an exception, so I want to ignore or pass this line. How can I control above line in my junit?

 

java.lang.NullPointerException: Cannot read the array length because "<local4>" is null
at org.apache.jackrabbit.commons.jackrabbit.authorization.AccessControlUtils.getAccessControlList(AccessControlUtils.java:138)
at

 

@tanika02 @aanchal-sikka @manvisharma @lukasz-m 

 

Thanks!!

 

 

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Best answer by Uppari_Ramesh

SOLUTION:

 

Hi @tanika02  @salamswapnil @tarunkumar @kautuk_sahni ,@lukasz-m 

 

I am successfully able to pass the line JackrabbitAccessControlList acl = AccessControlUtils.getAccessControlList(accessControlManager, "path");

without getting an exception.

 

The code for passing above line without exception is :

 

@Mock
private AccessControlPolicyIterator accessControlPolicyIterator;

@Mock
private AccessControlManager accessControlManager;

@Mock
private AccessControlPolicy accessControlPolicy;

//To build policies
ImmutableList.Builder<AccessControlPolicy> policies = ImmutableList.builder();
//add mocked access Control Policy
policies.add(accessControlPolicy);
//build policy
List<AccessControlPolicy> l = policies.build();
//convert to array
AccessControlPolicy[] array= l.toArray(new AccessControlPolicy[0]);

//this is the behaviour for internal implementation of method getAccessControlList()
when(accessControlManager.getApplicablePolicies("path")).thenReturn(accessControlPolicyIterator);
when(accessControlPolicyIterator.hasNext()).thenReturn(true,false);
when(accessControlManager.getPolicies("path")).thenReturn(array);

 

 

Thanks for your time!!

4 replies

Uppari_Ramesh
Uppari_RameshAuthorAccepted solution
New Participant
June 30, 2023

SOLUTION:

 

Hi @tanika02  @salamswapnil @tarunkumar @kautuk_sahni ,@lukasz-m 

 

I am successfully able to pass the line JackrabbitAccessControlList acl = AccessControlUtils.getAccessControlList(accessControlManager, "path");

without getting an exception.

 

The code for passing above line without exception is :

 

@Mock
private AccessControlPolicyIterator accessControlPolicyIterator;

@Mock
private AccessControlManager accessControlManager;

@Mock
private AccessControlPolicy accessControlPolicy;

//To build policies
ImmutableList.Builder<AccessControlPolicy> policies = ImmutableList.builder();
//add mocked access Control Policy
policies.add(accessControlPolicy);
//build policy
List<AccessControlPolicy> l = policies.build();
//convert to array
AccessControlPolicy[] array= l.toArray(new AccessControlPolicy[0]);

//this is the behaviour for internal implementation of method getAccessControlList()
when(accessControlManager.getApplicablePolicies("path")).thenReturn(accessControlPolicyIterator);
when(accessControlPolicyIterator.hasNext()).thenReturn(true,false);
when(accessControlManager.getPolicies("path")).thenReturn(array);

 

 

Thanks for your time!!

    TarunKumar
    TarunKumar
    New Participant
    June 30, 2023

    Hi @uppari_ramesh ,

    In path, can you trying passing the json resource that you might have loaded and also create specific nodes in the resource that you load. Lets see if that resolve your issue.

      S
      salamswapnil
      New Participant
      June 30, 2023

      @uppari_ramesh 

      You can mock static methods with Mockito library. You need mockito-core and mockito-inline dependency for this.

      @Mock private AccessControlManager mockedAccessControlManager; @Mock private JackrabbitAccessControlList acl; @Test void testMethod() { try (MockedStatic<AccessControlUtils> util = Mockito.mockStatic(AccessControlUtils.class)) { util.when(() -> AccessControlUtils.getAccessControlList(mockedAccessControlManager, "path")).thenReturn(acl); } }

       

        Uppari_Ramesh
        Uppari_RameshAuthor
        New Participant
        June 30, 2023

        Hi @salamswapnil , @tanika02 

         

        I have tried the solution that you have proposed but still the control is going inside the actual method getAccessControlList() and it is not taking the mocked object. Getting 

         

        java.lang.NullPointerException: Cannot invoke "javax.jcr.security.AccessControlPolicyIterator.hasNext()" because "itr" is null
        at org.apache.jackrabbit.commons.jackrabbit.authorization.AccessControlUtils.getAccessControlList(AccessControlUtils.java:129)

         

         

        Note : I have added subsequent when and then conditions for conditions inside method getAccessControlList but getting 

         

        java.lang.NullPointerException: Cannot read the array length because "<local4>" is null
        at org.apache.jackrabbit.commons.jackrabbit.authorization.AccessControlUtils.getAccessControlList(AccessControlUtils.java:138)
        at

          Tanika02
          Tanika02
          New Participant
          June 30, 2023

          Hello @uppari_ramesh - 

           

          To handle the exception and pass or ignore the mentioned line in your JUnit test, you can use a try-catch block. Here's an example of how you can control the line in your JUnit:

           

           

           

          @Test public void yourTestMethod() { try { JackrabbitAccessControlList acl = AccessControlUtils.getAccessControlList(accessControlManager, "path"); // Rest of your test code that depends on 'acl' } catch (NullPointerException e) { // Handle the exception or ignore it // You can choose to leave this block empty if you want to ignore the exception } }

           

           

           

          By wrapping the problematic line inside the try block, any exceptions that occur during its execution will be caught by the catch block. In this case, a NullPointerException is caught. You can handle the exception within the catch block by providing custom logic or leave it empty to simply ignore the exception and continue with the rest of the test.

            Uppari_Ramesh
            Uppari_RameshAuthor
            New Participant
            June 30, 2023

            Hi @tanika02 ,

             

            Thanks for the reply! 

             

            My requirement is different to solution that you have proposed. I want control above line junit file with when() and then().

             

            Thanks!!

              Tanika02
              Tanika02
              New Participant
              June 30, 2023

              Hello @uppari_ramesh - 

               

              import org.junit.Test; import org.mockito.Mockito; public class YourTestClass { @Test public void yourTestMethod() { // Create a mock of the AccessControlUtils class AccessControlUtils accessControlUtilsMock = Mockito.mock(AccessControlUtils.class); // Define the behavior of the mock Mockito.when(accessControlUtilsMock.getAccessControlList(Mockito.any(), Mockito.anyString())) .thenReturn(null); // Use the mock in your test // This will now return null instead of throwing a NullPointerException JackrabbitAccessControlList acl = accessControlUtilsMock.getAccessControlList(accessControlManager, "path"); // Rest of your test code... } }
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