Skip to main content

a pytest plugin for parallel and concurrent testing

Project description

pytest-parallel

a pytest plugin for parallel and concurrent testing

What?

This plugin makes it possible to run tests quickly using multiprocessing (parallelism) and multithreading (concurrency).

Why?

pytest-xdist is great to run tests that:

  1. aren't threadsafe
  2. perform poorly when multithreaded
  3. need state isolation

pytest-parallel is better for some use cases (like Selenium tests) that:

  1. can be threadsafe
  2. can use non-blocking IO for http requests to make it performant
  3. manage little or no state in the Python environment

Put simply, pytest-xdist does parallelism while pytest-parallel does parallelism and concurrency.

Requirements

  • Python3 version [3.6+]
  • Unix or Mac for --workers
  • Unix, Mac, or Windows for --tests-per-worker

Installation

pip install pytest-parallel

Options

  • workers (optional) - max workers (aka processes) to start. Can be a positive integer or auto which uses one worker per core. Defaults to 1.
  • tests-per-worker (optional) - max concurrent tests per worker. Can be a positive integer or auto which evenly divides tests among the workers up to 50 concurrent tests. Defaults to 1.

Examples

# runs 2 workers with 1 test per worker at a time
pytest --workers 2

# runs 4 workers (assuming a quad-core machine) with 1 test per worker
pytest --workers auto

# runs 1 worker with 4 tests at a time
pytest --tests-per-worker 4

# runs 1 worker with up to 50 tests at a time
pytest --tests-per-worker auto

# runs 2 workers with up to 50 tests per worker
pytest --workers 2 --tests-per-worker auto

Notice

Beginning with Python 3.8, forking behavior is forced on macOS at the expense of safety.

Changed in version 3.8: On macOS, the spawn start method is now the default. The fork start method should be considered unsafe as it can lead to crashes of the subprocess. See bpo-33725.

Source

License

MIT

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

pytest-parallel-0.1.1.tar.gz (9.5 kB view hashes)

Uploaded Source

Built Distribution

pytest_parallel-0.1.1-py3-none-any.whl (7.0 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page