Added pytest test suite for LFP developing brain functionality with GitHub Actions integration

[laurator]

Description

Added pytest test suite for LFP developing brain functionality

Changes

• Added test_LFP.py to test examples/LFP_developing_brain/LFP_developing_brain.py
• Updated GitHub Actions workflow to install from requirements.txt and run the tests automatically
• Added pytest to requirements.txt for testing dependencies
• Downloaded files in GitHub Actions workflows are cached to run the tests faster
• Timer tool added

Testing

• To run locally: pip install -r requirements.txt and pip install . in the /ncpi folder.
• All tests of the repository can be run with pytest -v. All files called test_*.py will be searched and run.
• Specific tests can be run with pytest test_LFP.py. Using python test_LFP.py as an alternative to run a specific script is also possible. In case the tests are run with python test_LFP.py, the last 5 lines of the script have to be uncommented to show the results.
• GitHub Actions will automatically run tests on push/PR in the main or ncpi-tests branch.

[AlejandroOrozcoValero]

The test test_LFP.py gives an error. It looks like it doesn't import the LFP_developing_brain module correctly. I followed the instructions gived in the PR.

Here is the error message I get:

The key error is:

NameError: name 'lfp' is not defined

This happens in tests/test_LFP/test_LFP.py at line 53, where it tries to call lfp.load_model_features().

Could you check if there's a missing import statement in the test file?

[laurator]

• Sorry, I forgot to mention that if tests are run locally, installing the local version of the repository is required to make this test work. This is achieved by running pip install . in the /ncpi folder.
• In case the tests are run with python test_LFP.py, the last 5 lines of the script have to be uncommented to show the results.
• I've also added a functionality to download the data automatically if tests are run locally.

[AlejandroOrozcoValero]

Thanks for the implementation! I've tested it and it works correctly. Approving the PR.