+ ci: shard backend tests 4-way + drop -v for ~3.5x wall-clock speedup
Root cause of the 4 CI failures on PR #1514 (all in
test_print_start_assigns_printer_id_to_vp_archive.py +
test_timelapse_baseline_restart_recovery.py): test_all_modules_importable
in test_code_quality.py was deleting backend.app.main from sys.modules
and re-importing it via importlib.import_module. That created NEW
module-level dicts (_timelapse_baselines, _expected_prints,
_active_prints, …) and re-ran root_logger.addHandler — hence the
duplicate log lines at the same microsecond in captured stderr.
Any sibling test that bound those names via "from backend.app.main
import _timelapse_baselines" before the reimport now held a reference
to the OLD dict; production code (reached via "from backend.app.main
import on_print_start") resolved the symbol through the NEW module
instance. Production mutated the new dict, the test read the old one,
the assertion saw None / un-mutated mock_archive.
Locally with -n 30, xdist load-balanced test_code_quality.py to a
different worker process so the collision never happened (which is
why the suite was green for me). CI's -n auto = -n 2 on ubuntu-latest
made the collision deterministic.
Fix: drop the "del sys.modules[name]" step. importlib.import_module
already returns the cached module if cached, or runs the import
machinery if not — either way, any import-time error surfaces. The
"fresh import" framing was theatre; in practice every module in the
list is already imported by other tests/fixtures before this test
runs, so we were never actually getting a fresh import anyway — just
destruction.
CI workflow tightening (separate concern, same PR since both touch
the test infrastructure):
- Dropped -v from the pytest invocation. 5300+ "PASSED foo::bar"
lines per worker were eating ~30-60s of stdout I/O on 2-vCPU
runners. --tb=short is sufficient for failure context.
- Sharded backend-tests into a 4-way matrix via pytest-split (new
dev dep). Each shard runs ~1326 tests in ~95s on a 2-vCPU runner;
all 4 run in parallel so wall-clock drops from 362s -> ~100s.
- fail-fast: false on the matrix so a single failing shard doesn't
hide failures in the other three — PRs see the complete failure
picture in one push.
- Remove 28 unused imports across 22 test files
- Prefix 4 unused local variables with _ in app code
(archives, bambu_mqtt, main) and remove 1 dead store
- Consolidate import/import-from in test_plate_detection.py
- Fix unreachable statement in test_archive_service.py
- Simplify redundant comparison in timelapse_processor.py
Resolves ~50 CodeQL py/unused-import, py/unused-local-variable,
py/import-and-import-from, py/unreachable-statement, and
py/redundant-comparison findings.
- New APIBrowser component with full OpenAPI schema integration
- Fetches and parses /openapi.json automatically
- Groups endpoints by API tags (printers, archives, settings, etc.)
- Expandable endpoint sections with color-coded method badges
- Path parameter, query parameter, and JSON body editors
- Auto-populates request body with schema examples
- Live API request execution with response display
- Response shows status code, timing, and formatted JSON
- Copy response button with clipboard fallback
- Search to filter endpoints across all categories
- Expand All / Collapse All buttons
- Link to Swagger UI (/docs)
- Two-column layout for API Keys tab
- Left: API key management + webhook documentation
- Right: API Browser with dedicated test key input
- Parameter validation
- Shows warning for missing required parameters
- Validates before sending requests to avoid 422 errors
- UX improvements
- "Use in API Browser" button on newly created keys
- Responsive layout (stacked on mobile, side-by-side on xl+)
