Improve unittest

[nicolargo]

• [x] use PyTest as a default test framework (have a look on official site, migration can be done softly with https://docs.pytest.org/en/8.2.x/how-to/unittest.html)
• [x] Split memory leak test in a specific file
• [x] Create a performance test
• [x] Improve tests by testing all the plugin/model.py methods
• [ ] Add dummies tests for all plugins (for example sensors could not be tested in the CI because the CI containers do not expose any sensors)
• [ ] https://github.com/nicolargo/glances/issues/2749
• [ ] write tests using Gherkin (Cucumber / Behave): see example here: https://github.com/ritvik-shetty/BDD_DEMO/tree/main/bdd_test
• [x] https://github.com/nicolargo/glances/issues/3044

[nicolargo]

Improve tests by testing all the plugin/model.py methods done in Glances 4.0.0

[nicolargo]

Pytest tesbed

Include existing unittest

./venv/bin/pip install pytest

ln -s unittest-core.py test_core.py

./venv/bin/pytest
.....................................                                                                          [100%]
37 passed in 20.43s

Also work with other unitest file:

ln -s unittest-restful.py test_restful.py

ln -s unittest-xmlrpc.py test_xmlrpc.py

./venv/bin/pytest
......................................................................                                         [100%]
70 passed in 31.61s

Add new Pytest tests

Example:

cat /home/nhe/dev/glances/glances/timer_test.py
from .timer import Timer
def test_timer():
    t = Timer(5)
    assert t is not None

./venv/bin/pytest
.                                                                                                              [100%]
1 passed in 0.09s

[github-actions[bot]]

This issue is stale because it has been open for 3 months with no activity.

[nicolargo]

For PyTest migration (have a look to https://github.com/giampaolo/psutil/commit/42c7a241c1caf8d723dc360422db937d6036b40f)

[nicolargo]

Some interesting read: https://www.agest.am/write-good-python-tests

[nicolargo]

For integration test: https://www.docker.com/blog/running-testcontainers-tests-using-github-actions/