c - Specifying output string argument with GoogleMock -

i'm evaluating google test/mock framework unit tests of c code.

how can specify output string argument function mock?

here have int get_int_param(const char *) function test , uses int _get_text_file_content(const char *fn, char *content) function want mock.

how specify char *content going result of execution of mocking function?

i'm struggling code:

test(getparametertest,positiv){    const static int strlen=29;    char *text=(char *)calloc(strlen,1);    strcpy(text, "param1=1\nparam2=42\nparam3=3");     mokedfunctions mokedfunctions;    expect_call(mokedfunctions, _get_text_file_content("process.conf",_)).times(atleast(1)).willonce(setargreferee<1>(text));     expect_eq(1, get_int_param("param1")); } 

and got compile error:

/usr/include/gmock/gmock-more-actions.h: in instantiation of ‘typename  testing::internal::function<f>::result testing::setargrefereeactionp<k,  value_type>::gmock_impl<f>::gmock_performimpl(const args_type&,  arg0_type, arg1_type, arg2_type, arg3_type, arg4_type, arg5_type,  arg6_type, arg7_type, arg8_type, arg9_type) const [with arg0_type =  const char*; arg1_type = char*; arg2_type =  testing::internal::excessivearg; arg3_type =  testing::internal::excessivearg; arg4_type =  testing::internal::excessivearg; arg5_type =  testing::internal::excessivearg; arg6_type =  testing::internal::excessivearg; arg7_type =  testing::internal::excessivearg; arg8_type =  testing::internal::excessivearg; arg9_type =  testing::internal::excessivearg; f = int(const char*, char*); int k = 1;  value_type = char*; typename testing::internal::function<f>::result =  int; testing::setargrefereeactionp<k,  value_type>::gmock_impl<f>::args_type = std::tuple<const char*, char*>]’:   /usr/include/gmock/gmock-generated-actions.h:664:23:   required   ‘static result testing::internal::actionhelper<result,   impl>::perform(impl*, const std::tuple<_u1, _u2>&) [with a0 = const   char*; a1 = char*; result = int; impl =   testing::setargrefereeactionp<1, char*>::gmock_impl<int(const char*,   char*)>]’   /usr/include/gmock/gmock-more-actions.h:168:1:   required   ‘testing::setargrefereeactionp<k,   value_type>::gmock_impl<f>::return_type   testing::setargrefereeactionp<k,   value_type>::gmock_impl<f>::perform(const args_type&) [with f =   int(const char*, char*); int k = 1; value_type = char*;   testing::setargrefereeactionp<k,   value_type>::gmock_impl<f>::return_type = int;   testing::setargrefereeactionp<k, value_type>::gmock_impl<f>::args_type   = std::tuple<const char*, char*>]’   test_param.cpp:68:1:   required here  /usr/include/gmock/gmock-more-actions.h:175:3: error: size of array negative  gtest_compile_assert_(internal::is_reference<argk_type>::value,  ^  in file included /usr/include/gmock/gmock.h:65:0,              test_param.cpp:2:   /usr/include/gmock/gmock-more-actions.h:177:28: error: assignment of read-only location ‘std::get<1u, {const char*, char*}>((* & args))’     ::std::tr1::get<k>(args) = value;                         ^   make[1]: *** [test_param.o] error 1 

what i'm doing wrong?

setargreferee expects argument c++ reference, it's not case.

in general, in order better understand these actions helps think of them operations on argument arg:

• setargpointee(value) *arg = value (arg must pointer)
• setargreferee(value) arg = value (arg must reference)
• setarrayargument(first, last) memcpy(arg, first, last - first) (arg must pointer)
• savearg(ptr) *ptr = arg
• saveargpointee(ptr) *ptr = *arg (arg must pointer)

given that, becomes obvious action need setarrayargument<1>(text, text + strlen(text) + 1).