Python Testing with pytest

Setting Up tox

Up to now we’ve had the cards_proj code in one directory and the tests in our chapter directories. Now we’ll combine them into one project and add a tox.ini file.

Here’s the abbreviated code layout:

cards_proj
├── LICENSE
├── README.md
├── pyproject.toml
├── pytest.ini
├── src
│   └── cards
│       └── ...
├── tests
│   ├── api
│   │   └── ...
│   └── cli
│       └── ...
└── tox.ini

You can explore the full project at /path/to/code/ch11/cards_proj. This is a typical layout for many package projects.

Let’s take a look at a basic tox.ini file in the Cards project:

ch11/cards_proj/tox.ini

[tox]
envlist = py310
isolated_build = True

[testenv]
deps =
  pytest
  faker
commands = pytest

Under [tox], we ...