Uninteresting mock function call; no success to match trivial call

[paul-bormans-pcgw]

I'm struggling with a (trivial) function to mock; the call is made and even reported by gmock but i can't seem to match the expectation. I have been reading a lot on this, code seems fine to me, no issue's with const, virtual, etc...

Are there maybe any compile flags/optimizations that could screw-up the matching?

namespace buffer {

class IGosBuffer {
public:
    virtual ~IGosBuffer();
    
    static boost::shared_ptr<IGosBuffer> create(....);

    virtual void start() = 0;
    virtual void stop() = 0;
    virtual void insert(const std::vector<std::shared_ptr<arrow::RecordBatch> >& rbatches) = 0;
};

class MockGosBuffer : public IGosBuffer
{
public:
    MOCK_METHOD(void, start, (), (override));
    MOCK_METHOD(void, stop, (), (override));
    MOCK_METHOD(void, insert, (
        const std::vector<std::shared_ptr<arrow::RecordBatch> >& rbatches), (override));
};

}

namespace other {

TEST_F(FooTest, MyTest)
{
    boost::shared_ptr<buffer::MockGosBuffer> mock(new buffer::MockGosBuffer());

    sut->emit_if(mock);

    EXPECT_CALL(*mock, start);
}

Giving following output:

GMOCK WARNING:
Uninteresting mock function call - returning directly.
    Function call: start()
NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/main/docs/gmock_cook_book.md#knowing-when-to-expect-useoncall for details.
Stack trace:

/....../test/foo_test.cpp:99: EXPECT_CALL(*mock, start) invoked
Stack trace:
/...../test/foo_test.cpp:99: Failure
Actual function call count doesn't match EXPECT_CALL(*mock, start)...
         Expected: to be called once
           Actual: never called - unsatisfied and active

[paul-bormans-pcgw]

EXPECT_CALL had to be done BEFORE the actual call to sut :-)