test_helpers: Remove capture_event helper.

We now consistently use the `tornado_redirected_to_list`
helper, which asserts the number of events sent too.

zerver/lib/test_helpers.py

@@ -92,30 +92,6 @@ def simulated_queue_client(client: Callable[[], object]) -> Iterator[None]:
         yield
 
 
-class EventInfo:
-    def populate(self, call_args_list: List[Any]) -> None:
-        args = call_args_list[0][0]
-        self.realm_id = args[0]
-        self.payload = args[1]
-        self.user_ids = args[2]
-
-
-@contextmanager
-def capture_event(event_info: EventInfo) -> Iterator[None]:
-    # Use this for simple endpoints that throw a single event
-    # in zerver.lib.actions.
-    with mock.patch("zerver.lib.actions.send_event") as m:
-        yield
-
-    if len(m.call_args_list) == 0:
-        raise AssertionError("No event was sent inside actions.py")
-
-    if len(m.call_args_list) > 1:
-        raise AssertionError("Too many events sent by action")
-
-    event_info.populate(m.call_args_list)
-
-
 @contextmanager
 def cache_tries_captured() -> Iterator[List[Tuple[str, Union[str, List[str]], Optional[str]]]]:
     cache_queries: List[Tuple[str, Union[str, List[str]], Optional[str]]] = []

zerver/tests/test_user_status.py

@@ -1,9 +1,8 @@
-from typing import Any, Dict, Set
+from typing import Any, Dict, List, Mapping, Set
 
 import orjson
 
 from zerver.lib.test_classes import ZulipTestCase
-from zerver.lib.test_helpers import EventInfo, capture_event
 from zerver.lib.user_status import get_user_info_dict, update_user_status
 from zerver.models import UserProfile, UserStatus, get_client
 
@@ -142,11 +141,11 @@ class UserStatusTest(ZulipTestCase):
     def update_status_and_assert_event(
         self, payload: Dict[str, Any], expected_event: Dict[str, Any]
     ) -> None:
-        event_info = EventInfo()
+        events: List[Mapping[str, Any]] = []
-        with capture_event(event_info):
+        with self.tornado_redirected_to_list(events):
             result = self.client_post("/json/users/me/status", payload)
         self.assert_json_success(result)
-        self.assertEqual(event_info.payload, expected_event)
+        self.assertEqual(events[0]["event"], expected_event)
 
     def test_endpoints(self) -> None:
         hamlet = self.example_user("hamlet")