Has anyone tried using Cmockery in C++ code (to mock C functions called from C++ code)?

[Daryl Spitzer]

If you have, how did you work around errors like:

my_tests.cpp: In function ‘void test_some_stuff(void**)’:
my_tests.cpp:72: error: invalid conversion from ‘void*’ to ‘const
char*’
my_tests.cpp:72: error: initializing argument 5 of ‘void
_expect_string(const char*, const char*, const char*, int, const
char*, int)’

For details, see
http://stackoverflow.com/questions/4610892/how-do-i-tell-gcc-to-relax-its-restrictions-on-typecasting-when-calling-a-c-funct.

--
Daryl

[Andreas Schneider]

On Thursday 06 January 2011 02:18:54 Daryl Spitzer wrote:
> If you have, how did you work around errors like:
>
> my_tests.cpp: In function ‘void test_some_stuff(void**)’:
> my_tests.cpp:72: error: invalid conversion from ‘void*’ to ‘const
> char*’

Rewrite the code that it is correct and cast everything correctly. That's what
should be done...

-- andreas

[Daryl Spitzer]

It's the expect_string_count macro in cmockery.h that is casting
incorrectly (for C++):

#define expect_string(function, parameter, string) \
    expect_string_count(function, parameter, string, 1)
#define expect_string_count(function, parameter, string, count) \
    _expect_string(#function, #parameter, __FILE__, __LINE__, (void*)string, \
                  count)

Here's the prototype for _expect_string (from cmockery.h):

void _expect_string(
const char* const function, const char* const parameter,
const char* const file, const int line, const char* string,
const int count);

The expect_string_count macro is casting the "string" argument to
void*, and that argument is const char* in the _expect_string
function.

For now, I'm going to try #undef expect_string_count and then redefine
it without the cast (as described in one answer to my StackOverflow
question). Though I'd be happy to submit a patch using #if
__cplusplus, if the committers think it's worth the work.

--
Daryl

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