pytest-jubilant-bdd

A pytest plugin providing reusable Gherkin step handlers for behavior-driven testing of Juju charmed operators.

pytest-jubilant-bdd is a collection of various utilities that make it easier for you and your friends to write behavior-driven tests for Juju charmed operators. The plugin provides a curated set of reusable Gherkin step handlers built on top of jubilant and pytest-bdd, so you can focus on the behavior of your charms instead of the boilerplate of driving the Juju lifecycle from your tests. Current reusable steps shipped in the pytest-jubilant-bdd package include:

• add_model: A given step handler for adding a new Juju model to the testing context.
• add_unit: A given step handler for adding units to a deployed application.
• deploy: A given step handler for deploying a charm from Charmhub.
• deploy_local: A given step handler for deploying a local .charm file onto a Juju model.
• integrate: A given step handler for integrating two Juju applications.
• model_exists: A given step handler for asserting that a Juju model currently exists.
• pack_charm: A given step handler for packing a charm from a project directory using charmcraft. Skips packing when the <APP>_CHARM_PATH environment variable is already set.
• is_integrated: A given step handler for asserting that two applications are currently integrated.
• is_deployed: A given step handler for asserting that an application is currently deployed on a Juju model.
• reset_app_config: A given step handler for resetting a configuration option on a deployed application to its default.
• reset_model_config: A given step handler for resetting a model configuration option to its default.
• set_app_config: A given step handler for setting a configuration option on a deployed application.
• set_model_config: A given step handler for setting a configuration option on a Juju model.
• switch_model: A given step handler for switching the default model that subsequent step handlers operate on.
• run_action: A when step handler for running a Juju action on one or more units.
• run_exec: A when step handler for executing a command on one or more machines or units.
• assert_all_agent_status: A then step handler for asserting the status of all agents in one or more models.
• assert_workload_status: A then step handler for asserting the workload status of a deployed application.
• assert_workload_status_message: A then step handler for asserting the message attached to a workload status.

For more information on how to use or contribute to pytest-jubilant-bdd, check out the Development section below 👇

🤔 What's next?

If you want to learn more about all the things you can do with pytest-jubilant-bdd, here are some further resources for you to explore:

• Open an issue

🛠️ Development

The project uses just and uv for development, which provides some useful commands that will help you while hacking on pytest-jubilant-bdd:

just fmt          # Apply formatting standards to code
just lint         # Check code against coding style standards
just typecheck    # Run static type checks
just unit         # Run unit tests

If you're interested in contributing your work to pytest-jubilant-bdd, take a look at our contributing guidelines for further details.

🤝 Project and community

pytest-jubilant-bdd is a project of the Ubuntu High-Performance Computing community. Interested in contributing bug fixes, new step handlers, documentation, or feedback? Want to join the Ubuntu HPC community? You’ve come to the right place 🤩

Here’s some links to help you get started with joining the community:

• Ubuntu Code of Conduct
• Join the conversation on Matrix
• Get the latest news on Discourse

📋 License

pytest-jubilant-bdd is free software, distributed under the Apache License, v2.0. See the LICENSE file for further details.