Mock class without PowerMock in arquillian Test

Question

I would like to now, if it is possible to mock a class like

public class MyClass{
   ...
}

Our business logic create this object with new myClass() somewhere in the code and therefore I don't have access to the created object to mock those methods. Is there a way to replace the whole class or to overwrite those methods. I'm using mockito and I only found examples to do this like

@Test
public void myTest{
    MyClass myClass = Mockito.mock(MyClass.class);
    Mockito.when(myClass.myMethod()).thenReturn("hello World");
    ...
}

We can't use PowerMock because it isn't compatible with our test environment.

Any suggestions are welcome.

The above code mocked the class MyClass. You want to test the methods inside MyClass or what you are trying to TEST? — Minh Kieu, May 20 '16 at 13:03
@MinhKieu I want to mock a class, not just an instance, because `new MyClass()` isn't called inside the test function — Simon Schüpbach, May 20 '16 at 13:42

score 0 · Answer 1 · edited May 23 '17 at 12:16

0

Sorry, i see only two hardcore solutions:

Make Powermock working by using PowerMockRule and PowerMock Rule Agent: Getting javassist not found with PowerMock and PowerRule in Junit with Mockito

or

Use Java Reflection to set the mocked object to MyClass: Is it possible in Java to access private fields via reflection

edited May 23 '17 at 12:16

Community

1
1

answered May 20 '16 at 13:23

tak3shi

2,305
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score 0 · Answer 2 · answered May 23 '16 at 08:15

I found a passable way to achieve my requirement.

I converted MyClass to a bean, just add annotation @Dependent.

@Dependent
public class MyClass{
   public Integer someMethod(){
       return 100;
   }
}

I use MyClass in business logic like that

public class BusinessClass{
    @Inject
    MyClass myClass

    public Integer doSomething(){
        return myClass.someMethod();
    }
}

After this change I'm able to mock the class in my test with annotation @Specializes

@Specializes
@Dependent
public class MyClassMock extends MyClass
{
    @Override
    public Integer someMethod(){
        return 23; // return my mocked value
    }
}

MyClass will be automatically replaced with MyClassMock in testenvironment.

Mock class without PowerMock in arquillian Test

2 Answers2