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eranpeer / FakeIt

C++ mocking made easy. A simple yet very expressive, headers only library for c++ mocking.
MIT License
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Help: Can FakeIt mock C functions? #73

Closed jamespharvey20 closed 7 years ago

jamespharvey20 commented 7 years ago

Need to add a mock library to my unit tests.

All of my development is c++11, so I like the looks of FakeIt, but I do use the MySQL c connector. I have database classes that use it internally, and would like to mock out the MySQL c connector library.

I'd like to avoid writing an abstract base class defining an interface to the MySQL library, with a class inheriting from it that uses the MySQL c connector, and another being a mock class. I'd prefer to be able to mock the actual MySQL c functions, so I don't leave the derived class that uses the MySQL c connector untested, admittedly it would basically be a straight passthrough.

Can FakeIt help with this, or do I need to look for another mock library or use pre-processor or linker methods for C functions?

I looked through the examples and issues, and don't see anything showing mocking c functions, but wanted to ask before I assumed it can't do it.

eranpeer commented 7 years ago

FakeIt manipulates the virtual table. It can't handle c functions. Your only option is to create a cpp abstract class and use it for mocking.

On Oct 1, 2016 04:34, "jamespharvey20" notifications@github.com wrote:

Need to add a mock library to my unit tests.

All of my development is c++11, so I like the looks of FakeIt, but I do use the MySQL c connector. I have database classes that use it internally, and would like to mock out the MySQL c connector library.

I'd like to avoid writing an abstract base class defining an interface to the MySQL library, with a class inheriting from it that uses the MySQL c connector, and another being a mock class. I'd prefer to be able to mock the actual MySQL c functions, so I don't leave the derived class that uses the MySQL c connector untested, admittedly it would basically be a straight passthrough.

Can FakeIt help with this, or do I need to look for another mock library or use pre-processor or linker methods for C functions?

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jamespharvey20 commented 7 years ago

Thanks!