How to use gmock MOCK_METHOD for overloaded operators?
c++, googlemock, googletest
Solution
You can't. See: https://groups.google.com/forum/#!topic/googlemock/O-5cTVVtswE
The solution is to just create a regular old fashioned overloaded method like so:
class Foo {
public:
virtual ~Foo() {}
virtual int operator [] (int index) = 0;
};
class MockFoo: public Foo {
public:
MOCK_METHOD1(BracketOp, int(int index));
virtual int operator [] (int index) override { return BracketOp(index); }
};
Problem
I am new to googlemock (and StackOverflow). I got a problem when using `MOCK_METHODn` in googlemock and I believe this function is widely used. Here is what I did. I have an abstract class `Foo` with virtual overloaded `operator[]`: ``` class Foo{ public: virtual ~Foo(){}; virtual int operator [] (int index) = 0; } ``` and I want to use googlemock to get a `MockFoo`: ``` class MockFoo: public Foo{ public: MOCK_METHOD1(operator[], int(int index)); //The compiler indicates this line is incorrect } ``` However, this code gives me a compile error like this: ``` error: pasting "]" and "_" does not give a valid preprocessing token MOCK_METHOD1(operator[], GeneInterface&(int index)); ``` My understanding is that compiler misunderstands the `operator[]` and doesn't take it as a method name. But what is the correct way to mock the `operator[]` by using `MOCK_METHODn`? I have read the docs from googlemock but found nothing related to my question. Cound anyone help me with it? Thanks!