Unable to reuse fakes across multiple test modules

[samgalactic]

I am trying to create Fakes for unit tests in an embedded C project. I can create a single unit test module which will work well, but there are some functions calls which are common to multiple modules which need to be faked in multiple test modules, and this is causing problems.

For example, I have a Fake function defined as:

FAKE_VOID_FUNC(TraceAssert_Report, uint8_t, uint32_t);

which appears in two separate test modules, and causes the link error:

Error multiple definition of `TraceAssert_Report_fake' UnitTests [ProjDir]\HeaterTests.o 0

Error multiple definition of `TraceAssert_Report_reset()' UnitTests [ProjDir]\HeaterTests.cpp 33

I have attempted to use to solution presented in the README.md, which is to separate definition and declaration. So I then have a header file with

DECLARE_FAKE_VOID_FUNC(TraceAssert_Report, uint8_t, uint32_t);

and two separate source files which both have

DEFINE_FAKE_VOID_FUNC(TraceAssert_Report, uint8_t, uint32_t);

but the error messages are exactly the same with this approach.

Is there a way to Fake a function across multiple test modules without hitting multiple definition errors?

Using Windows 10. Visual Studio 2015, Visual GDB, Toolchain arm-eabi

[Lizhangz]

If you need common behavior, you can just define it in a common c file. If you need different behavior for different cases, you should use the custom_fake or SET_RETURN_SEQ.