Tests for Prevention of [some] RoomList Regressions

[lukebarnard1]

In order to have some degree of confidence in merging:

• Improve room list performance when receiving messages matrix-org/matrix-react-sdk#1801
• Implement a simple shouldComponentUpdate for DNDRoomTile #6313

, the plan is to write a few tests to make sure RoomTiles and RoomSublists are updating correctly in response to app state changing. To be clear, the following tests should pass prior to the changes mentioned.

The following should be tested (manually/automatically):

1. receiving a message in an unread room causes it to transition to the "read" state;
2. receiving a room state event for a room should update the respective view of the RoomTile, namely:
   • avatar;
   • name;
   • member event (in case the room name is "Alice, Bob and 2345 others";
3. receiving a message in a room which is not at the top of a manually sorted RoomSubList;
4. having a notification count > 0 should be displayed when we receive an event and the count is > 0;
5. the notification count should be zeroed when we look at the room.

Automated test considerations:

1. and 2. could probably be done with a RoomTile instance and a mocked js-sdk (room/client). 3. would require RoomListStore only, with the assumption that the RLS state is accurately rendered.

[lukebarnard1]

Some other ones I thought of:

• receiving invites;
• receiving group invites;
• room tagging in general.

[lampholder]

https://docs.google.com/spreadsheets/d/1_EeVYIP5q8XGrpDF1dMjJkL1DoL-bFEy7Vcp5m_ecJg/edit?usp=sharing

[turt2live]

@lampholder what's the status of this one?

[lampholder]

Hah, my manual qa results from a year ago can probably safely be closed :P Thanks.