refactor(storage): route project DSNs and remove legacy backends

tests/unit/test_wndb_connection.py

@@ -45,9 +45,11 @@ class _FakeConnection:
 @pytest.fixture(autouse=True)
 def clear_native_connections():
     connection.g_conn_dict.clear()
+    connection.g_conninfo_dict.clear()
     connection._project_locks.clear()
     yield
     connection.g_conn_dict.clear()
+    connection.g_conninfo_dict.clear()
     connection._project_locks.clear()
 
 
@@ -61,6 +63,10 @@ def test_is_project_open_drops_closed_cached_connection():
 def test_open_connection_reuses_healthy_cached_connection(monkeypatch):
     cached = _FakeConnection()
     connection.g_conn_dict["fengyang"] = cached
+    connection.g_conninfo_dict["fengyang"] = "dbname=fengyang"
+    monkeypatch.setattr(
+        connection, "get_project_pgconn_string", lambda db_name: f"dbname={db_name}"
+    )
 
     def fail_connect(*, conninfo, autocommit):
         raise AssertionError("cached connection should be reused")
@@ -84,7 +90,7 @@ def test_read_all_reopens_closed_cached_connection(monkeypatch):
 
     monkeypatch.setattr(connection.pg, "connect", fake_connect)
     monkeypatch.setattr(
-        connection, "get_pgconn_string", lambda db_name: f"dbname={db_name}"
+        connection, "get_project_pgconn_string", lambda db_name: f"dbname={db_name}"
     )
 
     rows = database.read_all("fengyang", "select * from times")
@@ -99,6 +105,7 @@ def test_read_all_reopens_cached_connection_when_health_check_fails(monkeypatch)
     stale = _FakeConnection(fail_ping=True)
     fresh = _FakeConnection(rows=[{"scheme_name": "base"}])
     connection.g_conn_dict["fengyang"] = stale
+    connection.g_conninfo_dict["fengyang"] = "dbname=fengyang"
 
     opened = []
 
@@ -108,7 +115,7 @@ def test_read_all_reopens_cached_connection_when_health_check_fails(monkeypatch)
 
     monkeypatch.setattr(connection.pg, "connect", fake_connect)
     monkeypatch.setattr(
-        connection, "get_pgconn_string", lambda db_name: f"dbname={db_name}"
+        connection, "get_project_pgconn_string", lambda db_name: f"dbname={db_name}"
     )
 
     rows = database.read_all("fengyang", "select * from scheme_list")
@@ -119,3 +126,20 @@ def test_read_all_reopens_cached_connection_when_health_check_fails(monkeypatch)
     assert opened == [("dbname=fengyang", True)]
     assert connection.g_conn_dict["fengyang"] is fresh
     assert fresh.executed == ["select * from scheme_list"]
+
+
+def test_open_connection_replaces_cache_when_project_dsn_changes(monkeypatch):
+    cached = _FakeConnection()
+    fresh = _FakeConnection()
+    connection.g_conn_dict["fengyang"] = cached
+    connection.g_conninfo_dict["fengyang"] = "host=old dbname=fengyang"
+    monkeypatch.setattr(
+        connection,
+        "get_project_pgconn_string",
+        lambda db_name: f"host=new dbname={db_name}",
+    )
+    monkeypatch.setattr(connection.pg, "connect", lambda **_kwargs: fresh)
+
+    assert connection.open_connection("fengyang") is fresh
+    assert cached.close_calls == 1
+    assert connection.g_conninfo_dict["fengyang"] == "host=new dbname=fengyang"