Assistant vocal local ESP32 : étapes 1 à 15, et 15b écrite

État du projet au premier commit :
- firmware ESP32 : micro I2S, lecture anti-gigue, MQTT (état retenu, testament),
  mains libres, domotique de démonstration, chien de garde, présence du serveur ;
- serveur Python : sessions, VAD, faster-whisper, pyannote, identification,
  droits par profil, domotique, mot de réveil, Piper ;
- broker Mosquitto : configuration, comptes et ACL (non activés en développement) ;
- étape 15b écrite, en attente d'essai : agent MQTT pour machines Linux.

Étapes 1 à 15 validées. 203 tests, pyright sans erreur.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/tests/test_mqtt_link.py

@@ -0,0 +1,69 @@
+"""Tests de la liaison MQTT du serveur, étape 15 : présence, refus du broker, journal fichier."""
+
+from __future__ import annotations
+
+import dataclasses
+import logging
+from collections.abc import Iterator
+from pathlib import Path
+
+import pytest
+from paho.mqtt.packettypes import PacketTypes
+from paho.mqtt.reasoncodes import ReasonCode
+
+from voice_server.__main__ import setup_logging
+from voice_server.mqtt_link import presence_topic, refusal_hint, split_topic
+from voice_server.settings import load_settings
+
+CONFIG = Path(__file__).resolve().parents[1] / "config.yaml"
+
+
+def test_presence_topic_is_not_taken_for_a_board() -> None:
+    """Le serveur s'abonne à voice/+/state, event... : sa présence ne doit pas y tomber."""
+    topic = presence_topic("voice")
+    assert topic == "voice/server/status"
+    parsed = split_topic(topic, "voice")
+    assert parsed is not None and parsed[1] not in ("state", "event", "audio/in", "audio/stream")
+
+
+def test_refused_credentials_point_to_the_fix() -> None:
+    hint = refusal_hint(ReasonCode(PacketTypes.CONNACK, "Not authorized"), "voice-server")
+    assert "server/.env" in hint and "make mqtt-user NAME=voice-server" in hint
+    bad_password = refusal_hint(ReasonCode(PacketTypes.CONNACK, "Bad user name or password"), "voice-server")
+    assert "server/.env" in bad_password
+
+
+def test_other_refusal_names_the_client() -> None:
+    hint = refusal_hint(ReasonCode(PacketTypes.CONNACK, "Server unavailable"), "voice-server")
+    assert "voice-server" in hint and "server/.env" not in hint
+
+
+@pytest.fixture
+def restore_logging() -> Iterator[None]:
+    """setup_logging remplace la configuration globale : on remet celle de pytest après."""
+    root = logging.getLogger()
+    saved = (root.level, list(root.handlers))
+    yield
+    for handler in root.handlers:
+        if handler not in saved[1]:
+            handler.close()
+    root.handlers[:] = saved[1]
+    root.setLevel(saved[0])
+
+
+def test_log_file_receives_the_journal(tmp_path: Path, restore_logging: None) -> None:
+    settings = dataclasses.replace(load_settings(CONFIG), log_file=tmp_path / "logs" / "voice-server.log")
+    setup_logging(settings)
+    logging.getLogger("voice_server").info("essai du journal")
+    for handler in logging.getLogger().handlers:
+        handler.flush()
+    assert settings.log_file is not None
+    assert "essai du journal" in settings.log_file.read_text(encoding="utf-8")
+
+
+def test_log_file_is_optional(tmp_path: Path) -> None:
+    text = CONFIG.read_text(encoding="utf-8").replace("file: logs/voice-server.log", "file:")
+    config = tmp_path / "config.yaml"
+    config.write_text(text, encoding="utf-8")
+    assert load_settings(config).log_file is None
+    assert load_settings(CONFIG).log_file == (CONFIG.parent / "logs" / "voice-server.log").resolve()