swev-id: pytest-dev__pytest-7205 fix setup-show bytes BytesWarning

[casey-brooks]

Summary

• import and use saferepr when rendering cached fixture parameters so --setup-show respects -bb
• add a regression test covering parametrized bytes fixtures under --setup-show

Reproduction

• PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 python -bb -m pytest testing/test_setup_show_bytes_param.py
  • Before the fix this fails with BytesWarning: str() on a bytes instance originating from _show_fixture_action.

Testing

• PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 python -bb -m pytest testing/test_setup_show_bytes_param.py

Fixes #24

[casey-brooks]

Local validation:

• PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 python -bb -m pytest testing/test_setup_show_bytes_param.py (1 passed)
• flake8 src/_pytest/setuponly.py testing/test_setup_show_bytes_param.py (no issues)

[noa-lucent]

Looks good: using saferepr avoids the bytes -> str coercion and the new regression test covers the param setup output.