Save a char* parameter intro a string

Question

Please help me with this question.. I'm beginner with gtest. I have a mocked function

DoSomething(const char* par0, const char* par2)

I want to save its second argument into

    std::string `savedPar_`;

EXPECT_CALL(mockd_, DoSomething(_, _,))
        .WillOnce(DoAll(SaveArg<1>(savedPar_), (Return(Ok))));

And got this error:

error: no match for ‘operator*’ (operand type is ‘const std::__cxx11::basic_string<char>’)
   *pointer = ::testing::get<k>(args);

Than you so much in advance!

I don't know googletest/gmock very well but why isn't `par2` involved in the assignment? — Ted Lyngmo, Oct 12 '21 at 13:18
@TedLyngmo what do you mean with that ? SaveArg<1> should save par2 — John Kan, Oct 12 '21 at 13:19
What is `pointer`? Looks like it's actually a string from the error message. As the error says, `std::string` does not have a `operator *` — ChrisMM, Oct 12 '21 at 13:26
I think it might be a simple question for somoene who really masters gtest. What other thing should I add in such example to fulfill the minimal reproducible example ? Thank you. — John Kan, Oct 12 '21 at 13:43
Any idea how can I save one of the arguments from DoSomething() ? Thanks. — John Kan, Oct 12 '21 at 13:57

score 2 · Accepted Answer · answered Oct 12 '21 at 14:08

2

According to the doc

SaveArg<N>(pointer) Save the N-th (0-based) argument to *pointer.

It should be:

std::string savedPar_;

EXPECT_CALL(mockd_, DoSomething(_, _,))
        .WillOnce(DoAll(SaveArg<1>(&savedPar_), (Return(Ok))));
//                                 ^

answered Oct 12 '21 at 14:08

Jarod42

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Thanks! I missed the & from savedPar_. One more question please if possible. How could I use savedPar_ in other expect_call not only after test is done ? – John Kan Oct 12 '21 at 14:43
Open a new question. – Jarod42 Oct 12 '21 at 14:47
ok, I need to create a new account for that. – John Kan Oct 12 '21 at 14:58

Save a char* parameter intro a string

1 Answers1