Prepare for Element Call integration (#9224)

* Improve accessibility and testability of Tooltip

Adding a role to Tooltip was motivated by React Testing Library's
reliance on accessibility-related attributes to locate elements.

* Make the ReadyWatchingStore constructor safer

The ReadyWatchingStore constructor previously had a chance to
immediately call onReady, which was dangerous because it was potentially
calling the derived class's onReady at a point when the derived class
hadn't even finished construction yet. In normal usage, I guess this
never was a problem, but it was causing some of the tests I was writing
to crash. This is solved by separating out the onReady call into a start
method.

* Rename 1:1 call components to 'LegacyCall'

to reflect the fact that they're slated for removal, and to not clash
with the new Call code.

* Refactor VideoChannelStore into Call and CallStore

Call is an abstract class that currently only has a Jitsi
implementation, but this will make it easy to later add an Element Call
implementation.

* Remove WidgetReady, ClientReady, and ForceHangupCall hacks

These are no longer used by the new Jitsi call implementation, and can
be removed.

* yarn i18n

* Delete call map entries instead of inserting nulls

* Allow multiple active calls and consolidate call listeners

* Fix a race condition when creating a video room

* Un-hardcode the media device fallback labels

* Apply misc code review fixes

* yarn i18n

* Disconnect from calls more politely on logout

* Fix some strict mode errors

* Fix another updateRoom race condition

test/components/structures/LegacyCallEventGrouper-test.ts

@@ -0,0 +1,140 @@
+/*
+Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+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 { MatrixClient, MatrixEvent } from 'matrix-js-sdk/src/matrix';
+import { EventType } from "matrix-js-sdk/src/@types/event";
+import { CallState } from "matrix-js-sdk/src/webrtc/call";
+
+import { stubClient } from '../../test-utils';
+import { MatrixClientPeg } from '../../../src/MatrixClientPeg';
+import LegacyCallEventGrouper, { CustomCallState } from "../../../src/components/structures/LegacyCallEventGrouper";
+
+const MY_USER_ID = "@me:here";
+const THEIR_USER_ID = "@they:here";
+
+let client: MatrixClient;
+
+describe('LegacyCallEventGrouper', () => {
+    beforeEach(() => {
+        stubClient();
+        client = MatrixClientPeg.get();
+        client.getUserId = () => {
+            return MY_USER_ID;
+        };
+    });
+
+    it("detects a missed call", () => {
+        const grouper = new LegacyCallEventGrouper();
+
+        grouper.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                };
+            },
+            getType: () => {
+                return EventType.CallInvite;
+            },
+            sender: {
+                userId: THEIR_USER_ID,
+            },
+        } as unknown as MatrixEvent);
+
+        expect(grouper.state).toBe(CustomCallState.Missed);
+    });
+
+    it("detects an ended call", () => {
+        const grouperHangup = new LegacyCallEventGrouper();
+        const grouperReject = new LegacyCallEventGrouper();
+
+        grouperHangup.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                };
+            },
+            getType: () => {
+                return EventType.CallInvite;
+            },
+            sender: {
+                userId: MY_USER_ID,
+            },
+        } as unknown as MatrixEvent);
+        grouperHangup.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                };
+            },
+            getType: () => {
+                return EventType.CallHangup;
+            },
+            sender: {
+                userId: THEIR_USER_ID,
+            },
+        } as unknown as MatrixEvent);
+
+        grouperReject.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                };
+            },
+            getType: () => {
+                return EventType.CallInvite;
+            },
+            sender: {
+                userId: MY_USER_ID,
+            },
+        } as unknown as MatrixEvent);
+        grouperReject.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                };
+            },
+            getType: () => {
+                return EventType.CallReject;
+            },
+            sender: {
+                userId: THEIR_USER_ID,
+            },
+        } as unknown as MatrixEvent);
+
+        expect(grouperHangup.state).toBe(CallState.Ended);
+        expect(grouperReject.state).toBe(CallState.Ended);
+    });
+
+    it("detects call type", () => {
+        const grouper = new LegacyCallEventGrouper();
+
+        grouper.add({
+            getContent: () => {
+                return {
+                    call_id: "callId",
+                    offer: {
+                        sdp: "this is definitely an SDP m=video",
+                    },
+                };
+            },
+            getType: () => {
+                return EventType.CallInvite;
+            },
+        } as unknown as MatrixEvent);
+
+        expect(grouper.isVoice).toBe(false);
+    });
+});