Junit for CustomPageNameProvider

We have implemented the custom implementation for the java class CustomPageNameProvider referring below link,

https://helpx.adobe.com/experience-manager/6-3/sites/developing/using/extending-analytics-pa-naming.html

And we are facing the challenges while implementing Junit for the CustomPageNameProvider for the below line,

Framework framework = context.getFramework();
Resource resource = context.getResource();

To get the context object in junit we have implemetated below line but we are unable to get the implementation object for the framework.

AnalyticsPageNameContext context = new AnalyticsPageNameContext(configuration, framework, resourceResolver, resource, "adobe", "/content/adobe");

We are looking any lead on the framework object on the Junit.

test case ,

Mockito.when(context.getFramework()).thenReturn(framework); // framework is throwing NullPointerException.

Mockito.when(context.getResource()).thenReturn(resource);
customPageNameProvider.getPageName(context);

Any lead would be highly appreciated.

Thanks,

Ramesh.