Reviewer's Guide

This PR adds two pytest-based unit tests for the switch_working_directory helper to verify it correctly restores the original working directory on exceptions and optionally deletes the temporary directory when requested.

File-Level Changes

Assessment against linked issues

Follow-up pushed in a7f78f6 to address failing mypy checks.

Change

• Added explicit type annotations for tmp_path fixture arguments in:
  • test_switch_working_directory_restores_original_cwd_on_error
  • test_switch_working_directory_remove_deletes_directory
• Added from pathlib import Path import.

Targeted validation

• python -m mypy --follow-imports=silent --ignore-missing-imports tests/test_helpers.py ✅

Pushed follow-up commit 0facb5c to fix the failing pre-commit.ci check.

What changed (auto-fixes from the repo hooks):

• adjusted typing import style to satisfy Ruff (TYPE_CHECKING + deferred Path import)
• applied Ruff formatting to the new tests
• simplified the exception test context usage with combined context managers

Validation:

• python -m pre_commit run --files tests/test_helpers.py

Thanks for the clear review guidance.

I’ll rework this into more complete coverage: both normal/error paths, and delete behavior for remove=True vs remove=False (likely via parametrization), then push an update.

Thanks for the concrete feedback — I pushed a follow-up in commit aa866ed that rewrites the coverage into one parametrized test over (remove, raise_error).

What this now verifies in one place:

• cwd changes inside the context
• cwd is restored after exit
• directory removal behavior is correct (
  emove=True removes,
  emove=False keeps)
• both normal and error paths are covered

Targeted validation run locally:

• python -m pytest --noconftest tests/test_helpers.py -k switch_working_directory -q (4 passed)

If you want, I can split this back into two parametrized tests (restore/remove) for readability, but I kept it as one per your suggestion.

Pushed follow-up commit edc596c to address the failing pre-commit.ci check.\n\n### What changed\n- Reformatted the long pytest.mark.parametrize decorator in ests/test_helpers.py (Ruff format).\n- Reworked the nested with in the error-path branch into a single multi-context with (...) block to satisfy Ruff SIM117.\n\n### Validation\n- python -m pre_commit run --files tests/test_helpers.py ✅\n

Quick follow-up on the requested rework: the PR now has a single parametrized test covering both normal/error paths and remove=true/false behavior, plus a pre-commit clean-up in edc596c.\n\n@radoering when you have a moment, could you take another look and let me know if this now matches what you had in mind?

Follow-up pushed: I rebased this branch onto the current main to clear the BEHIND state after the latest upstream changes.\n\nValidation after rebase:\n- python -m pytest --noconftest tests/test_helpers.py -k switch_working_directory -q ✅ (4 passed)\n\n@radoering when you have time, could you take another look at the latest revision?

Thanks for the detailed review. I updated the tests into a single parameterized matrix to cover both behaviors (cwd restore + conditional directory removal) across normal and error paths.\n\nIf you have a minute, could you please take another look and let me know if you’d like this split differently?