Tests rely on hardcoded path

[AKuederle]

At the moment the testfiles try to add hardcoed paths to the sys.path

wearable-hrv/tests/test_group/test_group.py

Line 3 in ac22c37

sys.path.append(r"C:\Users\msi401\OneDrive - Vrije Universiteit Amsterdam\PhD\Data\Coding\Validation Study\wearable-hrv")

wearable-hrv/tests/test_individual/test_individual.py

Line 2 in ac22c37

sys.path.append(r"C:\Users\msi401\OneDrive - Vrije Universiteit Amsterdam\PhD\Data\Coding\Validation Study\wearable-hrv")

That should be adapted to make it possible to run the tests on every system without modifieing the files

[Aminsinichi]

Currently the path is dynamically determined based on path = os.path.dirname(os.path.abspath(__file__)). Additionally, a few more tests have been added based on the newly added core features. Related commit