How to test parameters/args in gtest/gmock within expect_call

Question

i started unit-test with gtest and gmock. I want to test the content of an EXPECT_CALL in one line. How to do it the right way?

My example code:

class MockClientSignalEventHandler : public ISignalFunctionFeatureEventHandler<Data, Id> { public: MockClientSignalEventHandler() = default; MOCK_METHOD(void, onSignalEvent, (const std::shared_ptr<Id> &id, const std::shared_ptr<Data> &data), (override)); };

Now i want to check it in EXPECT_CALL. How can i check shared_ptr in EXPECT_CALL?

The code now looks like this:

EXPECT_CALL(*mockEventHandler, onSignal(::testing::_, ::testing::_)).WillOnce(ReturnFromDetached(&cv)); feature->handleFeatureMessage(messageHeader, data); std::mutex mx; std::unique_lock<std::mutex> lock(mx); cv.wait_for(lock, std::chrono::seconds(5));

Instead of ::testing::_ i want to check the content of shared_ptr.

Thanky you for your help!

Sedenion · Accepted Answer · 2025-04-12 08:35:56Z

Use testing::Pointee to "dereference" the shared_ptr. As the documentation notes, it works not only with raw pointers but also smart pointers. Minimal example (godbolt):

#include <memory> #include <gtest/gtest.h> #include <gmock/gmock.h> using ::testing::Pointee; using ::testing::Eq; struct Mock { MOCK_METHOD(void, Func, (std::shared_ptr<int> x)); }; TEST(Foo, Bar) { Mock m; EXPECT_CALL(m, Func(Pointee(Eq(42)))); m.Func(std::make_shared<int>(42)); }

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