Test cases to add unit tests for MBeanRegistrer class from apache.karaf.management package

I have some code which uses the MBeanRegistrer.java file as it is from apache.karaf.management package. I need to add some unit test for this particular class in my code. As I'm writing unit tests for the first time, I'm not being able to come up with any test cases to write tests.

The class can be found here:

http://ift.tt/2cLbt6b