How to expect a call on a mock object in a shared_ptr?

[doug livesey]

Hi -- sorry to be spamming the group, I'm reading all the docs and previous threads, honest! :)

I'm running into this compilation error when I try to set an expectation of a call on a mock object in a shared_ptr:

  test/poc/poc_test.cpp: In constructor '{anonymous}::PocTest::PocTest()':

  test/poc/poc_test.cpp:95:1: error: 'const struct poc::IPoc1' has no member named 'gmock_get_str'

The line that causes the error is here: https://github.com/biot023/improc/blob/590af5d421c37590421df3a780bf3c59c37d49ba/test/poc/poc_test.cpp#L95

As you can see, I'm dereferencing the shared_ptr, which *should* work, shouldn't it?

I've tried using Pointee, too, which didn't work, nor did dereferencing the pointer obtained explicitly by shared:ptr<>::get()

Could anyone advise me on how to set the expectation I need?

& again, sorry for all the questions -- I'm getting there, I promise.

Cheers,

   Doug.

[Vlad Losev]

You should pass the interface pointer into the collaborating objects, but EXPECT_CALL manipulates the state of the mock, so it expects to see the mock itself, not an interface pointer/reference.

 

Changing your code to

 struct PocTest : public Test

 {

  protected:

    string _msg;

    shared_ptr<const MockPoc1> _poc1;

    PartMockPoc2 _poc2;

    PocTest() :

      _msg( "mock poc1 string" ),

      _poc1( make_shared<const MockPoc1>() )

    {

      EXPECT_CALL( *_poc1, get_str() )

        .Times( 1 )

        .WillOnce( Return( _msg ) );

      EXPECT_CALL( _poc2, _get_poc1() )

        .Times( 1 )

        .WillOnce( Return( shared_ptr<const IPoc1>(_poc1) ) ); // explicit conversion required.

    }

  };

should work. But be be very careful when using shared pointers - they are prone to forming loops and leaking memory - and gmock stores its own copies of objects you pass into its actions and/or matchers.