converters have access to session

tests/test_session_interface.py

@@ -2,21 +2,26 @@ import flask
 from flask.sessions import SessionInterface
 
 
-def test_open_session_endpoint_not_none():
-    # Define a session interface that breaks if request.endpoint is None
+def test_open_session_with_endpoint():
+    """If request.endpoint (or other URL matching behavior) is needed
+    while loading the session, RequestContext.match_request() can be
+    called manually.
+    """
+
     class MySessionInterface(SessionInterface):
-        def save_session(self):
+        def save_session(self, app, session, response):
             pass
 
-        def open_session(self, _, request):
+        def open_session(self, app, request):
+            flask._request_ctx_stack.top.match_request()
             assert request.endpoint is not None
 
-    def index():
-        return "Hello World!"
-
-    # Confirm a 200 response, indicating that request.endpoint was NOT None
     app = flask.Flask(__name__)
-    app.route("/")(index)
     app.session_interface = MySessionInterface()
-    response = app.test_client().open("/")
+
+    @app.get("/")
+    def index():
+        return "Hello, World!"
+
+    response = app.test_client().get("/")
     assert response.status_code == 200