model/test_model: Add function to handle realm_user event update.

This commit contains Model._handle_realm_user_event()
which updates the meta data of the respective user in
Model.initia_data["realm_users"].

Author: mounilKshah

tests/model/test_model.py

@@ -237,6 +237,7 @@ def test_register_initial_desired_events(self, mocker, initial_data):
             "update_display_settings",
             "user_settings",
             "realm_emoji",
+            "realm_user",
         ]
         fetch_event_types = [
             "realm",

zulipterminal/model.py

@@ -150,6 +150,7 @@ def __init__(self, controller: Any) -> None:
                 ("update_display_settings", self._handle_update_display_settings_event),
                 ("user_settings", self._handle_user_settings_event),
                 ("realm_emoji", self._handle_update_emoji_event),
+                ("realm_user", self._handle_realm_user_event),
             ]
         )
 
@@ -1747,6 +1748,18 @@ def _handle_update_display_settings_event(self, event: Event) -> None:
                 view.message_view.log[msg_pos] = msg_w_list[0]
         self.controller.update_screen()
 
+    def _handle_realm_user_event(self, event: Event) -> None:
+        """
+        Handle change to user(s) metadata (Eg: full_name, timezone, etc.)
+        """
+        assert event["type"] == "realm_user"
+        if event["op"] == "update":
+            updated_details = event["person"]
+            for realm_user in self.initial_data["realm_users"]:
+                if realm_user["user_id"] == updated_details["user_id"]:
+                    realm_user.update(updated_details)
+                    break
+
     def _register_desired_events(self, *, fetch_data: bool = False) -> str:
         fetch_types = None if not fetch_data else self.initial_data_to_fetch
         event_types = list(self.event_actions)