pytest fast first

When applying TDD, a key to successful, fast development is quick feedback. This plugin tries to shorten the time to feedback by ordering fast tests before slower ones.

It measures the runtime of your tests and on subsequent sessions orders faster tests before slower ones.

Installation

pip install pytest-fast-first

Options

• --ff-inverse: Inverts the order (can be used to optimize the runtime of a test suite when run with xdist)
• --ff-group-by-module: By default tests are just ordered by their runtime. If you have module-scoped fixtures, this can help with better fixture reuse.
• `--ff-filepath: Use the given filepath to store/read results. Default: .pytest-runtimes

State file

The plugin creates the file .pytest-runtimes in which it stores the runtimes in JSON format. If you want runtime-based ordering in CI builds, you can check it in to your version control system (you will have to live with merge conflicts though).

License: MIT

Copyright 2021 Martin Vielsmaier

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.