Method FakeStepInfo

tests/unit/StepCallChainTest.cpp:9–14

class FakeStepInfo : public StepInfo {
public:
    FakeStepInfo(std::stringstream* markersPtr, const InvokeResult& result) :
        StepInfo("FAKE", ""),
        latestArgsPtr(0),
        markersPtr(markersPtr),
        result(result) {
    }

    InvokeResult invokeStep(const InvokeArgs* pArgs) const override {
        latestArgsPtr = pArgs;