tests: Add board qualification tests for user LEDs.

[nedseb]

Summary

Closes #85
Depends on #89 (framework extension)

Adds board qualification tests for the user RGB LED (red, green, blue) and BLE LED.

Scenario: tests/scenarios/board_leds.yaml

Test	Pin	Type
LED RED on/off	LED_RED (PC12)	hardware_script
LED RED visible	—	manual
LED GREEN on/off	LED_GREEN (PC11)	hardware_script
LED GREEN visible	—	manual
LED BLUE on/off	LED_BLUE (PC10)	hardware_script
LED BLUE visible	—	manual
RGB LED full cycle	R→G→B→white	hardware_script
RGB LED full cycle visible	—	manual
LED BLE on/off	LED_BLE (PH3)	hardware_script
LED BLE visible	—	manual

How to test

# Mock tests (no regression)
pytest tests/ -k mock

# Collect LED board tests
pytest tests/ -k board_leds --collect-only

# Run on hardware (requires STeaMi board, interactive)
pytest tests/ --port /dev/ttyACM0 -k board_leds -s

Test results

$ pytest tests/ -k mock -q
41 passed, 95 deselected

$ pytest tests/ -k board_leds --collect-only -q
10 tests collected (board_leds/LED RED on|off, LED RED visible, ..., LED BLE visible)

$ pytest tests/ -k board_leds -q  # (sans --port)
10 skipped  # correctly skipped without hardware

$ pytest tests/ --port /dev/ttyACM0 -k board_leds -s -v   
============================== test session starts ==============================
platform linux -- Python 3.13.7, pytest-8.3.5, pluggy-1.5.0 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: /home/nedjar/sandbox/micropython-steami-lib
configfile: pytest.ini
plugins: typeguard-4.4.2
collected 113 items / 103 deselected / 10 selected                                                                                                                                                                                                                          

tests/test_scenarios.py::test_scenario[board_leds/LED RED on/off/hardware]   [INTERACTIVE] Observez la LED rouge sur la carte, puis appuyez sur Entrée. 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED RED visible/hardware]   [MANUAL] La LED rouge s'est-elle allumée puis éteinte ? [Entree=oui / Echap=non] 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED GREEN on/off/hardware]   [INTERACTIVE] Observez la LED verte, puis appuyez sur Entrée. 

True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED GREEN visible/hardware]   [MANUAL] La LED verte s'est-elle allumée puis éteinte ? [Entree=oui / Echap=non] 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED BLUE on/off/hardware]   [INTERACTIVE] Observez la LED bleue, puis appuyez sur Entrée. 

True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED BLUE visible/hardware]   [MANUAL] La LED bleue s'est-elle allumée puis éteinte ? [Entree=oui / Echap=non] 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/RGB LED full cycle/hardware]   [INTERACTIVE] Observez la LED RGB (séquence R/G/B/blanc), puis appuyez sur Entrée. 

True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/RGB LED full cycle visible/hardware]   [MANUAL] La LED a-t-elle affiché rouge, vert, bleu, puis blanc ? [Entree=oui / Echap=non] 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED BLE on/off/hardware]   [INTERACTIVE] Observez la LED BLE, puis appuyez sur Entrée. 
True
PASSED
tests/test_scenarios.py::test_scenario[board_leds/LED BLE visible/hardware]   [MANUAL] La LED BLE (bleue) s'est-elle allumée puis éteinte ? [Entree=oui / Echap=non] 
True
PASSED

====================== 10 passed, 103 deselected in 37.75s ======================

Hardware test results will be added after board validation.

Test plan

• ruff check tests/ — passed
• pytest tests/ -k mock — 41 passed (no regression)
• 10 LED board tests correctly collected and skipped without --port
• Hardware validation on STeaMi board (pending)

[Copilot]

Pull request overview

Adds a new board-level (driverless) hardware qualification scenario to validate the STeaMi board’s user RGB LED channels and BLE LED via a mix of automated MicroPython scripts and manual confirmation prompts.

Changes:

• Add tests/scenarios/board_leds.yaml as a type: board scenario.
• Introduce 10 board qualification tests covering RED/GREEN/BLUE/BLE on-off scripts plus manual “visible” confirmations, and an RGB cycle script + manual confirmation.

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[nedseb]

Corrections suite à la review Copilot (955f174) :

• pre_prompt ajouté à chaque test hardware_script LED pour que l'opérateur puisse se préparer avant le clignotement (appui sur Entrée pour démarrer).
• Durée du blanc alignée : sleep_ms(1000) → sleep_ms(500) pour le blanc dans le cycle RGB, cohérent avec les 500ms par couleur.

[Copilot]

Pull request overview

Adds a new board-level qualification scenario to validate the STeaMi board’s user RGB LED (R/G/B + white mix) and BLE LED using the type: board YAML scenario framework (introduced in #89 / depends on #89).

Changes:

• Add tests/scenarios/board_leds.yaml defining 10 hardware-only tests (5 scripted LED toggles + 5 manual visibility confirmations).
• Include an RGB full-cycle scripted test (R → G → B → white) plus a manual confirmation step.

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[nedseb]

Réponses aux commentaires Copilot :

pre_prompt manquants sur les tests intermédiaires (GREEN, BLUE, cycle RGB) — Retrait volontaire : seuls le premier test RGB et le test BLE ont un pre_prompt. Les tests intermédiaires s'enchaînent sans pause car l'opérateur observe déjà la carte.

Formulation des pre_prompt — Corrigé : reformulé en « Appuyez sur Entrée pour lancer le test, puis observez la carte » pour clarifier que Entrée déclenche le test.

Durée du blanc (1000ms vs 500ms) — Déjà corrigé dans un commit précédent, le blanc est à 500ms comme les autres couleurs.