pytest-fixtures

Pytest fixtures provide a reliable way to manage setup, teardown, and dependency injection. You define reusable functions and apply them to tests, ensuring isolated and consistent environments that reduce flaky results.

A conftest.py file organizes fixtures and hooks for broader scope across multiple test modules. You need it when sharing setup logic across a directory, allowing you to manage dependencies without repeating imports in every test file.

You can parametrize pytest tests by applying the @pytest.mark.parametrize decorator to a test function. This allows efficient test case generation by feeding multiple data sets into a single test, reducing redundant code.

Pytest fixture scopes include function, class, module, and session. You choose a scope based on resource management needs, setting broader scopes like session for expensive resources to optimize execution speed and reduce overhead.

Yes, you can set up a basic fixture for database connections in your test suite. By managing the connection within a fixture, you ensure reliable environments and proper teardown, preventing database locks across test runs.

Flaky tests often stem from improper resource management or shared state. By grasping and applying the correct fixture scopes, you ensure optimal resource isolation and cleanup, which stabilizes your test environments.