加速成長分析指紋快取

tests/test_cache_manager.py

@@ -159,6 +159,22 @@ def test_clear_growth_cache_removes_shared_file(tmp_path, monkeypatch):
     assert not shared_cache.exists()
 
 
+def test_growth_source_fingerprint_short_cache_clears_with_growth_cache(tmp_path, monkeypatch):
+    from services import cache_service
+
+    shared_cache = tmp_path / "growth_analysis_cache.pkl"
+    monkeypatch.setattr(cache_service, "_GROWTH_SHARED_CACHE_FILE", shared_cache)
+    cache_service.clear_growth_cache()
+
+    cache_service.set_growth_source_fingerprint_cache("growth:source", ("2026-05-17", 10))
+
+    assert cache_service.get_growth_source_fingerprint_cache("growth:source") == ("2026-05-17", 10)
+
+    cache_service.clear_growth_cache()
+
+    assert cache_service.get_growth_source_fingerprint_cache("growth:source") is None
+
+
 def test_daily_sales_shared_view_cache_roundtrip(tmp_path, monkeypatch):
     from routes import daily_sales_routes