MartinHjelmare
## Problem The default_config integration still contains `unittest.TestCase` based unit tests. We want to rewrite them to standalone pytest test functions. ## Background The Home Assistant core standard is to write tests as standalone pytest test functions. We still have some old tests that are based on `unittest.TestCase`. We want all these tests to be rewritten as pytest test functions. Here are the docs for pytest: https://docs.pytest.org/en/stable/ Here's an example of an async pytest test function in Home Assistant core: https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/tests/components/tradfri/test_light.py#L156-L176 There are many pytest fixtures to help writing the tests. See: - https://docs.pytest.org/en/stable/reference.html#fixtures - https://github.com/home-assistant/core/blob/dev/tests/conftest.py - The most common fixture to use is [`hass`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/tests/conftest.py#L107) which will set up a [`HomeAssistant`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/core.py#L166) instance and start it. ## Task - Rewrite the tests one module at a time and submit the changes as a pull request to this repository. - We want to limit the change scope to a single module to not have the pull request be too long, which would take longer time to review. - Make sure to not interact with any integration details in tests of integrations. - Set up the integration with the core interface either [`async_setup_component`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/setup.py#L44-L46) or [`hass.config_entries.async_setup`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/config_entries.py#L693) if the integration supports config entries. - Assert the entity state via the core state machine [`hass.states`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/core.py#L887). - Call services via the core service registry [`hass.services`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/core.py#L1133). - Assert `DeviceEntry` state via the [device registry](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/helpers/device_registry.py#L101). - Assert entity registry `RegistryEntry` state via the [entity registry](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/helpers/entity_registry.py#L120). - Modify a `ConfigEntry` via the config entries interface [`hass.config_entries`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/config_entries.py#L570). - Assert the state of a config entry via the [`ConfigEntry.state`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/homeassistant/config_entries.py#L169) attribute. - Mock a config entry via the `MockConfigEntry` class in [`tests/common.py`](https://github.com/home-assistant/core/blob/4cce724473233d4fb32c08bd251940b1ce2ba570/tests/common.py#L658) - Remember to reference this issue in your pull request, but don't close or fix the issue until all tests for the integration are updated.