Mock constructor with mockito

Question

I want to mock a constructor into method.

public String generaID() {   
    GeneraIDParaEntidadCliente aux = new GeneraIDParaEntidadCliente(nombre, registro);   
    entidad.setID(aux.generaID);   
}

In my test I want do something like this :

when(new GeneraIDParaEntidadCliente(anyString(), any(Entidad.class)).thenReturn(generaIdMock)

but give me this error org.mockito.exceptions.misusing.InvalidUseOfMatchersException:

Any idea why?

possible duplicate of [Unit testing with mockito for constructors](http://stackoverflow.com/questions/11214136/unit-testing-with-mockito-for-constructors) — Sean Patrick Floyd, Nov 29 '13 at 12:54
but this solution doesn´t works for me, I don´t want to parametrice method. — Mathew Rock, Nov 29 '13 at 13:10

score 8 · Accepted Answer · edited Oct 12 '16 at 15:17

8

You can use PowerMock to mock constructors.

If you can't use PowerMock for some reason, the most workable solution is to inject a factory to whatever class contains this method. You would then use the factory to create your GeneraIDParaEntidadCliente object and mock the factory.

edited Oct 12 '16 at 15:17

Berik

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answered Nov 29 '13 at 13:33

Dave

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I tried whith org.powermock.api.mockito.PowerMockito.whenNewnew(GeneraIDParaEntidadCliente(String.class, Entidad.class).thenReturn(generaIdMock) But doesn´t work. Any idea why? – Mathew Rock Dec 02 '13 at 07:58
I'd have to see more of your code to know exactly what's wrong. Are you using @RunWith(PowerMockRunner.class) and @PrepareForTest on the test class? See [here](http://code.google.com/p/powermock/wiki/MockitoUsage13). – Dave Dec 03 '13 at 02:26
1

@RunWith(PowerMockRunner.class) and @PrepareForTest({GeneraIDParaEntidadCliente .class}) – Mathew Rock Dec 03 '13 at 12:53

score 0 · Answer 2 · answered Nov 30 '13 at 00:56

0

There are a couple of ways of doing this, described in my article on the Mockito wiki

answered Nov 30 '13 at 00:56

Dawood ibn Kareem

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ha ha ... instead of providing solution ... they are telling to change the code itself – Shashi Ranjan Sep 29 '16 at 10:01

score -1 · Answer 3 · answered Oct 20 '16 at 08:06

you can send mocked objects as paramemters to your class constructor, form example:

// define you object
public MainClassObj instanceClass;

// mock input parameter
MYClassObj mockedObj = Mockito.mock(MYClassObj.class);

// call construvtor with mocked parameter
instanceClass = new instanceClass(mockedObj);

Mock constructor with mockito

3 Answers3

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