Testing configuration¶

Use override() to confine a test setting to one block and guarantee cleanup:

config = AppConfig()

with config.override(debug=True):
    assert config.debug.get() is True

assert config.debug.get() is False

Use monkeypatch.setenv() followed by load_env() when exercising environment behavior. Give test-local config classes distinct names: each BaseConfig subclass is a singleton for the lifetime of its Python class, while values are still context-local.