Mocking a method with throw() specifier

 

I am trying to Google mock a virtual method which has a throw() specifier. The original function looks like this: 

virtual ReturnValue FunctionName() const throw();

I am getting the compiler error: looser throw specifier for 'virtual FunctionSignature'

Here is the code I have tried thus far: 

MOCK_CONST_METHOD0( FunctionName, ReturnValue() );  
MOCK_CONST_METHOD0( FunctionName, ReturnValue() throw() );  
MOCK_CONST_METHOD0( FunctionName, ReturnValue() ) throw(); // Gives a different error entirely.

I've tried just about every other combination I can think of, but these are the ones which seem most logical. How do I go about Google mocking a method with a throw() specifier?

From what I can tell, you'd have to use the "internal" GMOCK_METHOD0_ macro, and use: 

GMOCK_METHOD0_(, const throw(), , FunctionName, ReturnValue)

as MOCK_CONST_METHOD0(m, F) is #defineed to GMOCK_METHOD0_(, const, , m, F) , gmock/gmock-generated-function-mockers.h#644 and gmock/gmock-generated-function-mockers.h#347 defines that.

My solution: create an implementation of the virtual function which consists solely of passing through to a mocked method. 

MOCK_CONST_METHOD0( MockFunctionName, ReturnValue() );
virtual ReturnValue FunctionName() const throw()  
{  
    return MockFunctionName();  
}

Then, whenever you need to write an Expect_Call or do anything for that method, just refer to MockFunctionName.

Google mock does not support exception specifications. The reason is that they think exception specification is mostly a misfeature and should be avoided in practice, even if you use exceptions extensively.

There are some sources that supports this point of view:

  • Herb Sutter (author of "Exceptional C++" and "More Exceptional C++"): A Pragmatic Look at Exception Specifications http://www.gotw.ca/publications/mill22.htm

  • Anders Hejlsberg (chief designer of C#): The Trouble with Checked Exceptions http://www.artima.com/intv/handcuffs.html

    • The solution would be rewriting the code as: 

    virtual ReturnValue FunctionName() const throw();

    and then use: 

    MOCK_CONST_METHOD0( FunctionName, ReturnValue() );
    链接地址: http://www.djcxy.com/p/4792.html

    上一篇: 将具有循环引用的JavaScript对象字符串化（转换为JSON）

    下一篇: 用throw（）说明符嘲笑一个方法