Added new flag 'run_test' to support test steps for test exercises

[chrboesch]

Also created a simple exercise '102_testing' to test the new flag. After the new build system is ready, we skip the exercise in the flow to finish the actual testing exercise.
Regards: #277

[perillo]

I think you should add full support for testing, instead of first add a new `Exercisercise

Also created a simple exercise '102_testing' to test the new flag. After the new build system is ready, we skip the exercise in the flow to finish the actual testing exercise. Regards: #277

I think you should add full support for testing, instead of first adding a new Exercise field.

[chrboesch]

I think you should add full support for testing, instead of first adding a new Exercise field.

But why, we do not build productivity software, but just for learning purpose?

[perillo]

I think you should add full support for testing, instead of first adding a new Exercise field.

But why, we do not build productivity software, but just for learning purpose?

I think there is some misunderstanding here.

What I mean is that you should add a new field for testing an exercise (instead of running it) and update the code in ZiglingStep to actually spawn zig test exercise instead of zig build-exe exercise

[chrboesch]

What I mean is that you should add a new field for testing an exercise (instead of running it) and update the code in ZiglingStep to actually spawn zig test exercise instead of zig build-exe exercise

Agree.

@perillo Would you like to program that?