Re: [wic][PATCH v4 0/6] tests: standalone test-suite framework plus the first unit test

Patch series applied to wic, master branch.
Thanks Paul!

On Mon 2026-07-06 @ 06:28:58 PM, Trevor Woerner wrote:
> wic has no test mechanism of its own; it relies on the oe-selftest from
> oe-core, which needs a full bitbake build to exercise even pure-Python
> logic. This series starts a small standalone suite that runs from a
> plain checkout, framework first, then the first fix, and its test.
> 
>   - the suite skeleton (pyproject test extra, pytest config, layout,
>     a justfile command runner, and a README Testing section);
>   - a conftest that imports wic once up front (stopping the session with
>     a clear message if that fails) and prints a session banner;
>   - optional coverage and ruff linting, each exposed as just recipes;
>   - a one-line fix to wic.bb.utils (import errno) so mkdirhier's OSError
>     handler works, as its own commit;
>   - unit tests for mkdirhier() that pin its behaviour and catch that
>     bug.
> 
> The suite is green at every commit and the test tree is ruff-clean.
> 
> Changes in v4 (in response to review feedback, thanks to Paul Barker):
> 
> v4 restructures the v3 10-patch series into 6 patches. How the old
> patches map to the new ones:
> 
>   - v3 1/10 (skeleton) -> v4 1/6, which also gains a justfile command
>     runner in place of the run-tests.sh wrapper and no longer creates a
>     tests/docs/ tree;
>   - v3 2/10 (conftest banner) -> v4 2/6, which also absorbs the
>     wic-import check (see next line);
>   - v3 3/10 (run-tests.sh wrapper) -> dropped; the justfile replaces it
>     and its wic-import check moves into conftest, so the check runs on
>     every invocation rather than only through the wrapper;
>   - v3 4/10 (coverage) -> v4 3/6, exposed as just recipes;
>   - v3 5/10 (ruff linting) -> v4 4/6, exposed as just recipes, with
>     ruff now pinned exactly so the clean-bar gate is reproducible;
>   - v3 8/10 (tests/** E402 ignore) -> folded into v4 4/6;
>   - v3 6/10, 7/10, 10/10 (docs README, authoring guide, review rubric)
>     -> dropped; the suite ships a short README Testing section instead
>     of a tests/docs/ tree;
>   - v3 9/10 (test plus folded-in errno fix) -> split into v4 5/6 (the
>     errno fix, on its own, first) and v4 6/6 (the tests), and the tests
>     are reframed to target mkdirhier's own behaviour rather than
>     re-testing os.makedirs.
> 
> Dependency versions were also refreshed to current releases.
> 
> Changes in v3:
> 
>   - test_bb_utils used the tmp_path fixture instead of
>     tempfile.mkdtemp(), so the tests no longer leaked scratch
>     directories under /tmp;
>   - documented the standard pytest scratch-directory controls (TMPDIR
>     and --basetemp) rather than a custom variable;
>   - added a review-rubric doc.
> 
> Changes in v2:
> 
>   - v1 was a single ~6000-line commit that used xfail markers to record
>     the bugs it found; v2 broke the work into a reviewable series where
>     each test lands green next to the fix that makes it pass, with no
>     xfails.
> 
> Trevor Woerner (6):
>   tests: add the standalone unit-test suite skeleton
>   tests: add conftest with a wic-import preflight and session banner
>   tests: add optional coverage reporting
>   add ruff linting
>   bb/utils: import errno so mkdirhier's OSError handler works
>   tests/unit/test_bb_utils: cover mkdirhier()
> 
>  .gitignore                  |  4 ++
>  README.md                   | 15 +++++++
>  justfile                    | 27 +++++++++++++
>  pyproject.toml              | 24 +++++++++++
>  src/wic/bb/utils.py         |  1 +
>  tests/conftest.py           | 28 +++++++++++++
>  tests/unit/test_bb_utils.py | 81 +++++++++++++++++++++++++++++++++++++
>  7 files changed, 180 insertions(+)
>  create mode 100644 justfile
>  create mode 100644 tests/conftest.py
>  create mode 100644 tests/unit/test_bb_utils.py
> 
> -- 
> 2.50.0.173.g8b6f19ccfc3a