CODEWITHSUNDEEP
googlemock
user1135541
user1135541

Reputation: 1891

Capture GMOCK string parameter

If I have the following interface member function:

virtual bool print_string(const char* data) = 0;

with the following mock

MOCK_METHOD1(print_string, bool(const char * data));

Is it possible to capture the string that is passed to print_string()?

I tried to:

char out_string[20];     //
SaveArg<0>(out_string);  // this saves the first char of the sting

this saves the first char of the sting but not the whole string.

Upvotes: 3

Views: 5332

Answers (2)

rejkowic
rejkowic

Reputation: 363

Class

struct Foo {
    virtual bool print_string(const char* data) = 0;
};

Mock

struct FooMock {
    MOCK_METHOD1(print_string, bool(const char * data));
};

Test 

struct StrArg {
    bool print_string(const char* data) { 
        arg = data; 
        return true; 
    }
    string arg;
};

TEST(FooTest, first) {
    FooMock f;
    StrArg out_string;

    EXPECT_CALL(f, print_string(_))
        .WillOnce(Invoke(&out_string, &StrArg::print_string));
    f.print_string("foo");
    EXPECT_EQ(string("foo"), out_string.arg);
}

You can always use Invoke to capture parameter value in structure.

Upvotes: 3

jjlights
jjlights

Reputation: 11

May be something like:

char* p = out_string[0];
SaveArg<0>(&p);

since SaveArg(pointer) save the Nth argument to *pointer.

I think if you just need to validate the content of the array without deep copy, there is no need to create another array since only the pointer to the array could be obtained using this method.

Upvotes: 0

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