Unit Testing with Nose
- 1. UNIT TESTING WITH NOSE César Cárdenas Desales
- 2. Installing nose • Install pip • Install virtualenv • Install pip on your virtual environment • http://bit.ly/1kCeZv8 $ wget https://bootstrap.pypa.io/get-pip.py $ python get-pip.py $ pip install virtualenv $ virtualenv testingenv $ source testingenv/bin/activate $ python get-pip.py $ pip install nose
- 3. Step 1: Freedom, no unittest boilerplate $ nosetests $ nosetests basic_tests.py $ nosetests basic_tests
- 4. Step 2: Test functions $ nosetests $ nosetests basic_tests $ nosetests basic_tests:test_sum $ nosetests basic_tests:test_failing_sum
- 5. Step 3: Test classes $ nosetests basic_tests:TestSuite $ nosetests basic_tests:TestSuite.test_mult $ nosetests basic_tests:TestSuite.ignored
- 6. Step 4: Specify tests $ nosetests --collect-only -v $ nosetests --collect-only -v -s $ nosetests -v -s $ nosetests -v --nocapture
- 7. Step 5: Config files $ nosetests -v -c config.ini
- 8. Step 6: Fixtures => @with_setup(setup_function, teardown_function) $ nosetests –v
- 9. Step 7: Test generators & parallel testing 1 2 3 4 5 OK OK OK FAIL OK $ nosetests -v $ nosetests --processes=6
- 10. Step 8: Exceptions $ nosetests –v
- 11. Step 9: Timeouts $ nosetests -v basic_tests.py $ nosetests -v --processes=6 --process-timeout=1 basic_tests2 Plugins! => --processes --no-capture –collect-only
- 12. Py.test anyone? $ pip install pytest $ py.test step1/basic_tests.py $ py.test step2/basic_tests.py $ py.test -v step4/basic_tests.py ...
- 13. Is TDD dead? • No need to be purist and orthodox • “I get paid for code that works, not for tests, so my philosophy is to test as little as possible to reach a given level of confidence” • – Kent Beck • Test are code to maintain • Test core algorithms, data structures, logic with Biz. Value • Tests can become assertions • Test give you confidence to do changes
- 14. Exercise • Test whether the following code correctly calculates in which quarter falls the provided datetime.date object
- 15. ¿? • ¡ !