Wire local room logic (#9078)

* Wire local room logic

* Migrate to testling-lib; update test descriptions

test/Avatar-test.ts

@@ -0,0 +1,102 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { mocked } from "jest-mock";
+import { Room, RoomMember } from "matrix-js-sdk/src/matrix";
+
+import { avatarUrlForRoom } from "../src/Avatar";
+import { Media, mediaFromMxc } from "../src/customisations/Media";
+import DMRoomMap from "../src/utils/DMRoomMap";
+
+jest.mock("../src/customisations/Media", () => ({
+    mediaFromMxc: jest.fn(),
+}));
+
+const roomId = "!room:example.com";
+const avatarUrl1 = "https://example.com/avatar1";
+const avatarUrl2 = "https://example.com/avatar2";
+
+describe("avatarUrlForRoom", () => {
+    let getThumbnailOfSourceHttp: jest.Mock;
+    let room: Room;
+    let roomMember: RoomMember;
+    let dmRoomMap: DMRoomMap;
+
+    beforeEach(() => {
+        getThumbnailOfSourceHttp = jest.fn();
+        mocked(mediaFromMxc).mockImplementation((): Media => {
+            return {
+                getThumbnailOfSourceHttp,
+            } as unknown as Media;
+        });
+        room = {
+            roomId,
+            getMxcAvatarUrl: jest.fn(),
+            isSpaceRoom: jest.fn(),
+            getAvatarFallbackMember: jest.fn(),
+        } as unknown as Room;
+        dmRoomMap = {
+            getUserIdForRoomId: jest.fn(),
+        } as unknown as DMRoomMap;
+        DMRoomMap.setShared(dmRoomMap);
+        roomMember = {
+            getMxcAvatarUrl: jest.fn(),
+        } as unknown as RoomMember;
+    });
+
+    it("should return null for a null room", () => {
+        expect(avatarUrlForRoom(null, 128, 128)).toBeNull();
+    });
+
+    it("should return the HTTP source if the room provides a MXC url", () => {
+        mocked(room.getMxcAvatarUrl).mockReturnValue(avatarUrl1);
+        getThumbnailOfSourceHttp.mockReturnValue(avatarUrl2);
+        expect(avatarUrlForRoom(room, 128, 256, "crop")).toEqual(avatarUrl2);
+        expect(getThumbnailOfSourceHttp).toHaveBeenCalledWith(128, 256, "crop");
+    });
+
+    it("should return null for a space room", () => {
+        mocked(room.isSpaceRoom).mockReturnValue(true);
+        expect(avatarUrlForRoom(room, 128, 128)).toBeNull();
+    });
+
+    it("should return null if the room is not a DM", () => {
+        mocked(dmRoomMap).getUserIdForRoomId.mockReturnValue(null);
+        expect(avatarUrlForRoom(room, 128, 128)).toBeNull();
+        expect(dmRoomMap.getUserIdForRoomId).toHaveBeenCalledWith(roomId);
+    });
+
+    it("should return null if there is no other member in the room", () => {
+        mocked(dmRoomMap).getUserIdForRoomId.mockReturnValue("@user:example.com");
+        mocked(room.getAvatarFallbackMember).mockReturnValue(null);
+        expect(avatarUrlForRoom(room, 128, 128)).toBeNull();
+    });
+
+    it("should return null if the other member has no avatar URL", () => {
+        mocked(dmRoomMap).getUserIdForRoomId.mockReturnValue("@user:example.com");
+        mocked(room.getAvatarFallbackMember).mockReturnValue(roomMember);
+        expect(avatarUrlForRoom(room, 128, 128)).toBeNull();
+    });
+
+    it("should return the other member's avatar URL", () => {
+        mocked(dmRoomMap).getUserIdForRoomId.mockReturnValue("@user:example.com");
+        mocked(room.getAvatarFallbackMember).mockReturnValue(roomMember);
+        mocked(roomMember.getMxcAvatarUrl).mockReturnValue(avatarUrl2);
+        getThumbnailOfSourceHttp.mockReturnValue(avatarUrl2);
+        expect(avatarUrlForRoom(room, 128, 256, "crop")).toEqual(avatarUrl2);
+        expect(getThumbnailOfSourceHttp).toHaveBeenCalledWith(128, 256, "crop");
+    });
+});