How to mock object with constructor that takes a Class?

Question

This is the test:

import static junit.framework.Assert.assertTrue;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.whenNew;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest( {ClassUnderTesting.class} )
public class ClassUnderTestingTest {

    @Test
    public void shouldInitializeMocks() throws Exception {
        CollaboratorToBeMocked mockedCollaborator = mock(CollaboratorToBeMocked.class);

            suppress(constructor(CollaboratorToBeMocked.class, InjectedIntoCollaborator.class));

        whenNew(CollaboratorToBeMocked.class)
            .withArguments(InjectedAsTypeIntoCollaborator.class)
            .thenReturn(mockedCollaborator);

        new ClassUnderTesting().methodUnderTesting();

        assertTrue(true);
    }
}

These are the classes :

public class ClassUnderTesting {

    public void methodUnderTesting() {
        new CollaboratorToBeMocked(InjectedAsTypeIntoCollaborator.class);
    }

}

public class CollaboratorToBeMocked {

    public CollaboratorToBeMocked(Class<InjectedAsTypeIntoCollaborator> clazz) {
    }

    public CollaboratorToBeMocked(InjectedIntoCollaborator someCollaborator) {
    }

    public CollaboratorToBeMocked() {
    }

}

public class InjectedAsTypeIntoCollaborator {

}

public class InjectedIntoCollaborator {

}

This is the error :

org.powermock.reflect.exceptions.TooManyConstructorsFoundException: Several matching constructors found, please specify the argument parameter types so that PowerMock can determine which method you're refering to.
Matching constructors in class CollaboratorToBeMocked were:
CollaboratorToBeMocked( InjectedIntoCollaborator.class )
CollaboratorToBeMocked( java.lang.Class.class )

Here comes the question: how can I make PowerMock figure out what constructor to look for?

The problematic line is the suppress. That is where the error comes from.

Answer 1

Perhaps it is too late for your question. I met it today and found the solution at the following url. Basically, you need to specify your argument type like.

whenNew(MimeMessage.class).**withParameterTypes(MyParameterType.class)**.withArguments(isA(MyParameter.class)).thenReturn(mimeMessageMock); 

http://groups.google.com/group/powermock/msg/347f6ef1fb34d946?pli=1

Hope it can help you. :)