---
phase: 09-ux-tech-debt-closure
plan: 02
subsystem: testing
tags: [playwright, e2e, chromium, uvicorn, alpine-js, pytest]

# Dependency graph
requires:
  - phase: 09-01
    provides: "final printer_form.html with stable ids and inline upload form"
provides:
  - "Playwright headless e2e test suite infrastructure (tests/e2e/ package)"
  - "UX-02 evidence: live chromium verification of PRNT-03 Alpine IP->port auto-derivation"
  - "Session-scoped live_server fixture (uvicorn thread, free port, /health readiness)"
affects: [09-03, phase-10-rtval, future-e2e]

# Tech tracking
tech-stack:
  added: [pytest-playwright, playwright, uvicorn (as test server)]
  patterns: [session-scoped-live-server, playwright-fill-alpine-input, e2e-isolated-from-unit-tests]

key-files:
  created:
    - tests/e2e/__init__.py
    - tests/e2e/conftest.py
    - tests/e2e/test_port_autofill.py
  modified:
    - requirements-dev.txt
    - .planning/phases/09-ux-tech-debt-closure/09-VALIDATION.md

key-decisions:
  - "Route /printers used for e2e test (full-page route via printers.html extending base.html with Alpine.js loaded) — no new /printers/new route needed"
  - "conftest.py adapted from plan: config uses string paths (not Path objects), init_db() reads DB_PATH from imptune.config directly"
  - "playwright install chromium run separately after pip install -r requirements-dev.txt"

patterns-established:
  - "E2E fixture pattern: patch imptune.config.* string attrs, call init_db(), start uvicorn thread, poll /health before yielding base_url"
  - "Alpine @input tested via page.fill() which dispatches native input event + page.wait_for_function for synchronous handler stability"

requirements-completed: [UX-02]

# Metrics
duration: 3min
completed: 2026-04-13
---

# Phase 09 Plan 02: Playwright Port Autofill Summary

**Playwright headless chromium test verifying Alpine IP->port_name auto-derivation at /printers, with session-scoped uvicorn live_server fixture, closing UX-02**

## Performance

- **Duration:** 3 min
- **Started:** 2026-04-13T08:54:19Z
- **Completed:** 2026-04-13T08:57:31Z
- **Tasks:** 2
- **Files modified:** 5

## Accomplishments

- Playwright e2e package scaffolded (tests/e2e/__init__.py + conftest.py) with session-scoped live_server fixture running uvicorn in a background thread against an isolated tmp data dir
- UX-02 Playwright test written and verified green: headless chromium loads /printers, fills ip_address, asserts port_name equals IP_192_168_1_100 — Alpine @input handler confirmed working in real browser
- 112 unit tests unaffected (pytest tests/ -x -q --ignore=tests/e2e still passes)

## Printer Form Route

The test uses `/printers` (the full-page printers.html that extends base.html and embeds printer_form.html). No new route was needed — the existing /printers route renders the Alpine x-data wrapper with `<script defer src="/static/alpine.min.js">` loaded.

## Pytest Command and Green Output

```
pytest tests/e2e/test_port_autofill.py -v
============================= test session starts =============================
platform win32 -- Python 3.14.3, pytest-9.0.3
plugins: anyio-4.13.0, base-url-2.1.0, playwright-0.7.2
collected 1 item
tests/e2e/test_port_autofill.py::test_port_autofill[chromium] PASSED     [100%]
========================== 1 passed in 6.76s ==============================
```

## 09-VALIDATION.md UX-02 Citation

Evidence path: `tests/e2e/test_port_autofill.py`
Command: `pytest tests/e2e/test_port_autofill.py -v`
Result: 1 passed (commit 322fc20)

Both 09-02-01 and 09-02-02 rows in 09-VALIDATION.md marked green. Wave 0 e2e items checked.

## Task Commits

Each task was committed atomically:

1. **Task 1: Add Playwright dev deps + e2e package scaffolding** - `4e9bd9b` (chore)
2. **Task 2: Write UX-02 Playwright test for IP->port auto-fill** - `322fc20` (test)

**Plan metadata:** (docs commit follows)

## Files Created/Modified

- `requirements-dev.txt` - Added pytest-playwright and playwright dev deps
- `tests/e2e/__init__.py` - Empty package marker for e2e test suite
- `tests/e2e/conftest.py` - Session-scoped live_server fixture (uvicorn + /health poll + tmp data dir)
- `tests/e2e/test_port_autofill.py` - UX-02 Playwright headless chromium test (PRNT-03 evidence)
- `.planning/phases/09-ux-tech-debt-closure/09-VALIDATION.md` - UX-02 tasks marked green, Wave 0 items checked

## Decisions Made

- **Route used:** `/printers` (not `/printers/new`) — the existing full-page printers.html route already loads Alpine.js via base.html and embeds printer_form.html inline, no new route needed
- **Config adaptation:** The plan's conftest.py used Path objects but imptune/config.py uses string paths; adapted to patch `cfg.DATA_DIR`, `cfg.DB_PATH`, `cfg.DRIVERS_DIR`, `cfg.ICONS_DIR` as strings and call `init_db()` with no args (reads from patched cfg.DB_PATH)

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Adapted conftest.py to match actual imptune config API**
- **Found during:** Task 1 (creating tests/e2e/conftest.py)
- **Issue:** Plan's template used `_cfg.DATA_DIR = data_dir` (Path object) and `init_db(data_dir / "imptune.db")` but actual imptune.config uses string attributes and init_db() takes no arguments
- **Fix:** Patched cfg.DATA_DIR/DB_PATH/DRIVERS_DIR/ICONS_DIR as strings, called init_db() with no args, also set DATA_DIR env var for lifespan handler
- **Files modified:** tests/e2e/conftest.py
- **Verification:** Server starts successfully, /health returns 200, Playwright test passes
- **Committed in:** 4e9bd9b (Task 1 commit)

---

**Total deviations:** 1 auto-fixed (1 bug — API mismatch in plan template)
**Impact on plan:** Fix required for test to run. No scope creep.

## Issues Encountered

None beyond the config API mismatch documented above.

## User Setup Required

None - no external service configuration required. `pip install -r requirements-dev.txt && playwright install chromium` is all that's needed in dev environments.

## Next Phase Readiness

- UX-02 closed: `pytest tests/e2e/test_port_autofill.py -v` is the permanent regression guard for PRNT-03 Alpine port auto-derivation
- 09-03 (script download links) can proceed — e2e infrastructure in place for any future e2e tests
- Unit test suite unaffected: 112 tests green

---
*Phase: 09-ux-tech-debt-closure*
*Completed: 2026-04-13*
