feat: weather service — geocoding, Open-Meteo forecast, cache, change detection

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_weather_service.py

@@ -0,0 +1,56 @@
+import pytest
+from unittest.mock import AsyncMock, patch, MagicMock
+
+
+def test_parse_open_meteo_response():
+    """parse_forecast() should extract daily data into a clean list."""
+    from fabledassistant.services.weather import parse_forecast
+    raw = {
+        "daily": {
+            "time": ["2026-03-11", "2026-03-12"],
+            "temperature_2m_max": [15.0, 12.0],
+            "temperature_2m_min": [8.0, 6.0],
+            "precipitation_sum": [0.0, 3.2],
+            "weathercode": [0, 61],
+            "windspeed_10m_max": [10.0, 25.0],
+        }
+    }
+    days = parse_forecast(raw)
+    assert len(days) == 2
+    assert days[0]["date"] == "2026-03-11"
+    assert days[0]["temp_max"] == 15.0
+    assert days[0]["temp_min"] == 8.0
+    assert days[0]["precip_mm"] == 0.0
+    assert days[0]["weathercode"] == 0
+    assert days[1]["date"] == "2026-03-12"
+    assert days[1]["precip_mm"] == 3.2
+
+
+def test_describe_weathercode():
+    """describe_weathercode() should return human-readable strings."""
+    from fabledassistant.services.weather import describe_weathercode
+    assert describe_weathercode(0) == "Clear sky"
+    assert describe_weathercode(61) == "Rain: slight"
+    assert describe_weathercode(95) == "Thunderstorm"
+    assert "Unknown" in describe_weathercode(999)
+
+
+def test_detect_forecast_changes_no_change():
+    """detect_changes() should return empty list when forecasts are identical."""
+    from fabledassistant.services.weather import detect_changes
+    day = {"date": "2026-03-12", "temp_max": 12.0, "temp_min": 6.0,
+           "precip_mm": 3.2, "weathercode": 61}
+    assert detect_changes([day], [day]) == []
+
+
+def test_detect_forecast_changes_rain_added():
+    """detect_changes() should flag when precipitation appears."""
+    from fabledassistant.services.weather import detect_changes
+    old = [{"date": "2026-03-12", "temp_max": 14.0, "temp_min": 8.0,
+            "precip_mm": 0.0, "weathercode": 2}]
+    new = [{"date": "2026-03-12", "temp_max": 12.0, "temp_min": 7.0,
+            "precip_mm": 4.5, "weathercode": 61}]
+    changes = detect_changes(old, new)
+    assert len(changes) == 1
+    assert "2026-03-12" in changes[0]
+    assert "rain" in changes[0].lower() or "precip" in changes[0].lower()