Unit testing framework for AEM

• TestNG (http://testng.org/doc/index.html)
• JUnit (http://junit.org) and focus on the Server Side Testing (https://sling.apache.org/documentation/bundles/org-apache-sling-junit-bundles.html)
• Pax Exam (Somewhat dead... no activity in a year https://ops4j1.jira.com/wiki/display/PAXEXAM4/Documentation)
• Mockito (http://mockito.org/)
• Sling OSGi Mocks (https://sling.apache.org/documentation/development/osgi-mock.html)

Testing for AEM is no different than testing for any other Java based application. You just have to take in consideration that you are living in an OSGi-environment.

/Ove