Junit5 test case for accesscontrolManager functionality throws excpeption

This test case throws unsupported exception when using the JUNIT5 version as per below

I am instantiating the aem context at class level with below code

@ExtendWith({ AemContextExtension.class, MockitoExtension.class })

class TrashcanServletTest {

private final AemContext aemContext = new AemContext(ResourceResolverType.JCR_MOCK);

Testcase method is provided here :

void testDoGetSlingHttpServletRequestSlingHttpServletResponse() throws UnsupportedRepositoryOperationException, RepositoryException {

aemContext.create().page("/content/ey-unified-site/language-masters/en/blueprintpage2/page1", "/", "We Retail");

MockSlingHttpServletRequestmockSlingRequest = aemContext.request();

MockSlingHttpServletResponsemockSlingResponse = aemContext.response();

Resource payloadResource = mockSlingRequest.getResourceResolver().resolve("/content/ey-unified-site/language-masters/en/blueprintpage2/page1");

ResourceResolver rr = payloadResource.getResourceResolver();

    Session session = rr.adaptTo(Session.class);

    final AccessControlManager accessControlManager = session.getAccessControlManager();

    final Privilege moveToTrashCanPrivilege = accessControlManager.privilegeFromName(Privilege.JCR_REMOVE_NODE);

    if(accessControlManager.hasPrivileges(payloadResource.getPath(), new Privilege[]{moveToTrashCanPrivilege})) {

            //todo use full work

        }

This line-->     final AccessControlManager accessControlManager = session.getAccessControlManager(); throws java.lang.UnsupportedOperationException

Where as I found the test cases in below URL where JUNIT 4 class works

https://github.com/Adobe-Consulting-Services/acs-aem-commons/blob/master/bundle/src/test/java/com/adobe/acs/commons/wrap/jcr/BaseSessionIWrapTest.java

 Mocking the accessControlMager using when() method also not resolving the issue as per below code:

Mockito.lenient().when(session.getAccessControlManager()).thenReturn(accessControlManager);