Question

I want to make a JUnit test to assure that some classes don’t use a specific set of methods (from another classes). Example

class MyClass
{
   void myMethod()
   {
       otherClass.otherClassStaticMethod();
   }
}

class myTest
{
    void test()
    {
        assertFalse(CalledMethods.getMethodsCalledBy("myClass.myMethod").Contains("otherClass.otherClassStaticMethod"));
    }
}

In this test I want to assure that myMethod doesn’t invocate otherClassStaticMethod. How can I find what methods are being called inside a method in compile time (ignore methods called using reflection)? I thought about a .java parser, do you recommend any?

Answer 1

you can mock “otherClass” and verify that the method isn’t invoked. E.g. using Mockito you can even specify in which order what methods are supposed to be invoked (under the condition their instances are mocks) and specify which methods are not allowed to be invoked

as coding.mof said, to mock static methods you should use PowerMock/PowerMockito:

example:

PowerMockito.mockStatic(OtherClass.class);

PowerMockito.verifyStatic(never());
OtherClass.otherClassStaticMethod();