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tests/test_cache_manager.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+import pickle
 from flask import Flask, session
 
 
@@ -182,6 +183,46 @@ def test_clear_daily_sales_cache_removes_shared_view_cache_files(tmp_path, monke
     assert not cache_file.exists()
 
 
+def test_promo_dashboard_shared_cache_roundtrip(tmp_path, monkeypatch):
+    from routes import edm_routes
+
+    shared_cache = tmp_path / "promo_dashboard_cache.pkl"
+    monkeypatch.setattr(edm_routes, "_PROMO_SHARED_CACHE_FILE", shared_cache)
+    edm_routes._PROMO_DASHBOARD_CACHE.clear()
+    cache_key = ("edm", "default", "desc", "", "2026-05-19-12", (10, "2026-05-19T12:00:00", 30))
+    data = {
+        "sorted_grouped_items": {"11:00": []},
+        "slot_stats": {"11:00": {"on_shelf": 0}},
+        "items_in_batch": [],
+        "last_update_str": "2026-05-19 12:00",
+        "activity_time": "11:00",
+        "active_tab": "11:00",
+        "current_batch_id": "batch-1",
+    }
+
+    edm_routes._write_shared_promo_dashboard_cache(cache_key, data)
+    edm_routes._PROMO_DASHBOARD_CACHE.clear()
+
+    assert edm_routes._load_shared_promo_dashboard_cache(cache_key) == data
+    assert shared_cache.exists()
+
+
+def test_promo_dashboard_shared_cache_ignores_other_versions(tmp_path, monkeypatch):
+    from routes import edm_routes
+
+    shared_cache = tmp_path / "promo_dashboard_cache.pkl"
+    cache_key = ("edm", "default", "desc", "", "bucket", (1, "ts", 1))
+    shared_cache.write_bytes(
+        pickle.dumps(
+            {"version": "older-version", "entries": {cache_key: {"stale": True}}},
+            protocol=pickle.HIGHEST_PROTOCOL,
+        )
+    )
+    monkeypatch.setattr(edm_routes, "_PROMO_SHARED_CACHE_FILE", shared_cache)
+
+    assert edm_routes._load_shared_promo_dashboard_cache(cache_key) is None
+
+
 def test_sales_analysis_preview_context_cache_avoids_reloading_options(tmp_path, monkeypatch):
     from routes import sales_routes