GoogleTest how to use InvokeArgument With WithArg

Question

I have a mock function:

MOCK_METHOD4(my_func, int(double, double, void* (*cb) (int), int p1));

I want to invoke 2nd (0-based) argument of above function with the 3rd argument as parameter, i.e., invoke "cb" function with "p1" as parameter. How can I do that?

I can invoke "cb" with some custom value using InvokeArgument:

ON_CALL(mockObj, my_func(_, _, _, _)).
                WillByDefault(DoAll(
                        IgnoreResult(InvokeArgument<2>(10)),
                        Return(0)));

But I want to invoke it with an actual parameter passed to the same mocked function call.

Answer 1

You can define an ACTION to invoke your callback. Something like below:

ACTION(CallCb) {
  arg2(arg3);
}

...

ON_CALL(*mockObj, my_func(_, _, _, _))
  .WillByDefault(
     DoAll(CallCb(),
           Return(0)));