Pytest notes
From raju
assert actual expected template
assert that a function returns float
val = foo() assert isinstance(val, float), \ 'val is {} but expecting {}' \ .format(type(val), 'float')
Install pytest on Linux
pip3 install -U virtualenv python3 -m virtualenv venv source venv/bin/activate pip install pytest
Install pytest on Windows
pip3 install -U virtualenv # Create a new virtual environment called venv python3 -m virtualenv venv venv\Scripts\activate.bat pip install pytest
a trivial test
tags | hello world, trivial example
$ cat tests/test_trivial.py import pytest def test_multiply(): assert 3*4 == 12
To run it
$ python -m pytest tests
running tests
1. cd into the project's root directory
2a. To run a single test
python -m pytest tests/test_foo.py
2b. To run all the tests in a directory and subdirectories within
python -m pytest tests/utils
2c. To run all the tests in tests directory and subdirectories within
python -m pytest tests
2d. To run all the tests in tests directory but not the tests in subdirectories such as tests/utils
pytest tests