It is simple - just include a header file and you are good to go.To make it easy to create fake functions for testing C code.There is also a test suite for the framework under the test directory.
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Look under the examples directory for full length examples in both C and C++. See the example project that demonstrates the above approach. #define FFF_GCC_FUNCTION_ATTRIBUTES _attribute_((weak)) You can mark all fakes with the weak attribute like so: This has the benefit of allowing a binary to selectively use a subset of the required fake functions while testing the real variants without the need for many different make targets.Link a binary (you might have many) that defines a subset of real variants of the fake functions to the aforementioned fake library.Define a library of fake functions, e.g.Using weak functions in combination with fff can help simplify your testing approach. One usful attribute is the weak attribute that marks a function such that it can be overridden by a non-weak variant at link time. You can specify GCC function attributes for your fakes using the FFF_GCC_FUNCTION_ATTRIBUTES directive. ) ĭEFINE_FAKE_VOID_FUNC_VARARG(void_function_vargs, const char *, int. # include "public_header.h " DEFINE_FAKE_VALUE_FUNC( int, value_function, int, int) ĭEFINE_FAKE_VOID_FUNC(void_function, int, int) ĭEFINE_FAKE_VALUE_FUNC_VARARG( int, value_function_vargs, const char *, int. ) ĭECLARE_FAKE_VOID_FUNC_VARARG(void_function_vargs, const char *, int. # include "fff.h " DECLARE_FAKE_VALUE_FUNC( int, value_function, int, int) ĭECLARE_FAKE_VOID_FUNC(void_function, int, int) ĭECLARE_FAKE_VALUE_FUNC_VARARG( int, value_function_vargs, const char *, int. Here is an example of how it could be done: The solution is to separate declaration and definition of the fakes, and place the declaration into a public header file, and the definition into a private source file. This cannot be placed in a header, since it will lead to multiple definitions of the fake functions. Void (*custom_fakes)( char *) = How do I reuse a fake across multiple test-suites?įff functions like FAKE_VALUE_FUNC will perform both the declaration AND the definition of the fake function and the corresponding data structs. TEST_F(FFFTestSuite, custom_fake_sequence_not_exausthed) Void voidfunc1outparam_custom_fake3( char *a) Void voidfunc1outparam_custom_fake2( char *a) Void voidfunc1outparam_custom_fake1( char *a)
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