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I receive a compilation error while using the following Google Mock declaration:
EXPECT_CALL(some_object, someFunction(1,An<AStructIDefined>()))
.Times(2);
The error is:
1>ClCompile:
1> TestMyClass.cpp
1>TestMyClass.cpp(189): error C2664: 'mynamespace::MockMyClassClient::gmock_someFunction' : cannot convert parameter 2 from 'testing::Matcher<T>' to 'const testing::Matcher<T> &'
1> with
1> [
1> T=mynamespace::AStructIDefined
1> ]
1> and
1> [
1> T=const mynamespace::AStructIDefined &
1> ]
1> Reason: cannot convert from 'testing::Matcher<T>' to 'const testing::Matcher<T>'
1> with
1> [
1> T=mynamespace::AStructIDefined
1> ]
1> and
1> [
1> T=const mynamespace::AStructIDefined &
1> ]
1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
What am I doing wrong?
UPDATES:
I am using VS2010.
The declaration of someFunction is:
virtual void someFunction( long long ll, const AStructIDefined& a_struct);
An() is a Google Mock wildcard matcher with the following definition:
// Creates a matcher that matches any value of the given type T.
template <typename T>
inline Matcher<T> An() { return A<T>(); }
A simplified yet representative version of the struct is:
namespace mynamespace {
class ABaseCLass
{
public:
virtual ~ABaseCLass(){};
virtual bool isValid() const = 0;
};
struct AStructIDefined : public ABaseCLass
{
public:
OrderStatusReport(SomeEnum1 e_, int i_, double d_);
SomeEnum1 e;
int i;
double d;
const std::string toString() const;
bool isSane() const;
bool operator== (const SomeEnum1& ref_) const;
double getD() const;
int getI() const;
bool isCondition() const;
};
} // namespace mynamespace
258
It's possible to use Google Mock to mock a free function (i.e. a C-style function or a static method). You just need to rewrite your code to use an interface (abstract class). public: ... virtual bool Open(const char* path, const char* mode) { return OpenFile(path, mode); } };
Using the Turtle interface as example, here are the simple steps you need to follow: Derive a class MockTurtle from Turtle . Take a virtual function of Turtle (while it's possible to mock non-virtual methods using templates, it's much more involved). In the public: section of the child class, write MOCK_METHOD();
In real system, these counterparts belong to the system itself. In the unit tests they are replaced with mocks. Gtest is a framework for unit testing. Gmock is a framework imitating the rest of your system during unit tests.
You must always put a mock method definition ( MOCK_METHOD ) in a public: section of the mock class, regardless of the method being mocked being public , protected , or private in the base class.
The solution was to change the declaration from:
EXPECT_CALL(some_object, someFunction(1,An<AStructIDefined>()))
.Times(2);
to
EXPECT_CALL(some_object, someFunction(1,An<const AStructIDefined &>()))
.Times(2);
C++ implicitly casts const and reference & on function parameters, but google mock's declaration seems to require the type appearing in the function's signature and not the type submitted as a parameter to the function.
117
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