Native unit tests: missing Arduino.h

#1

Hello
I want to write some unit tests for my project. I do no want to test on hardware (embedded) as this overhead is to much hazzle for now.
I only need to test some functions, and class methods so i think there is no need to run on the target hardware (I also don’t have every possible ESP board :wink: )

So i made a new env with platform = native.

But when running the tests, it tries to build the code and complains about a missing Arduino.h. Building the platform = arduino envs works fine.

Do i miss something there?

1 Like
Status of support for debug of unit tests?
#2

That’s the point of native tests – to use the native host compiler (for Windows/Linux/Mac) to test that code which is hardware independent (or mockable), so no Arduino.h is available by default. What do you want your computer to do when when you call digitalWrite(LED_BUILTIN, HIGH);? :smiley:

See e.g. Redirecting... and the native and embedded tests for the calculator example.

Of course, you can still use techniques like mocking functions and objects, this thread gives some ideas.

#3

Oh I think I misunderstood you. It accidently builds your project code which has a Arduino.h dependency when it should not build that code at all? Then check the test options (docs), make sure all your to-be-tested code is in test/ or adapt test_build_project_src accordingly and double check the above listed examples, especially the tutorial.

1 Like