feat: facette Extensions dans les facettes de recherche #157

tests/test_search.py

@@ -225,6 +225,14 @@ class TestAdvancedSearchAPI:
         resp = client.get("/api/advanced-search?q=python&vault=all")
         data = self._check(resp)
         assert "facets" in data
+        # #157 — extension facet: keys are query-ready (no leading dot) and,
+        # when there are results, at least one extension is counted.
+        exts = data["facets"]["extensions"]
+        assert isinstance(exts, dict)
+        assert all(not e.startswith(".") for e in exts)
+        if data["total"] > 0:
+            assert len(exts) >= 1
+            assert sum(exts.values()) <= data["total"]
 
     def test_empty_query(self, client):
         resp = client.get("/api/advanced-search?q=")