[BUG] An error occurred when the constructor of a global instance called the mock method

[cagdasyesildag]

Hello,

I am testing C-Mock extension. Everything seems good. I can mock C type functions.

But, one of this mocked functions is called from a class's constructor. When I define a global instance, I get error from cmock-function-mockers.h, line=100. (error msg= Neither mock nor real function is present)

I made a change as below. It fixed my problem. Is there any better solution that you recommend?

[hjagodzinski]

Hi,

the exception is thrown because the constructor of a global class is called before the internal state of C-Mock is initialized. C-Mock was designed with the assumption a mocked function is called from the test code only. In your case, the code in question is called before a test suit even runs.

Your proposition allows a mocked function to be called outside a test. Since I don't know your case well enough I can only offer only general alternative suggestions.

1. A client might not expect side effects during an object instantiation hence it's reasonable to avoid them in constructors.
2. A global object having a state might lead to dependency between tests. You're better off having dedicated object instances per test.
3. Consider using CMockMocker instead of deprecated macros.