scenario-tests

Scenario testing separates Context, State, and events to validate charm behavior across events like start, relation_joined, config_changed, and pebble_ready. This structured approach prevents errors and saves time when authoring unit tests for Juju charms.

The best way to test Pebble interactions is using Scenario with ops.testing to drive state transitions. This allows you to validate pebble_ready events and Pebble behavior deterministically without a live Juju deployment.

Using pytest with ops.testing and Scenario allows you to verify Juju charm events by driving state transitions. This validates unit behavior across events such as start, relation_joined, and update_status without a live deployment.

To test config_changed and relation_joined events in isolation, use Scenario with ops.testing to drive state transitions. This allows deterministic validation of charm unit behavior across these events without a live environment.

Scenario enables reliable Juju charm unit testing without a live deployment. By driving state transitions with ops.testing, it validates unit behavior across events such as start, config_changed, and update_status.

Using Scenario for charm unit testing avoids the error-prone nature of manual approaches. It provides clear separation of Context, State, and events, driving state transitions with ops.testing to validate behavior deterministically.