Add voice broadcast permissions (#9284)

* Add Voice Broadcast labs setting and composer button

* Implement strict typing

* Extend MessageComposer-test

* Extend tests

* Revert some strict type fixex

* Implement voice broadcast permissions

* Update variable casing

test/components/views/settings/tabs/room/RolesRoomSettingsTab-test.tsx

@@ -0,0 +1,69 @@
+/*
+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 React from "react";
+import { fireEvent, render, RenderResult } from "@testing-library/react";
+import { EventType, MatrixClient } from "matrix-js-sdk/src/matrix";
+
+import RolesRoomSettingsTab from "../../../../../../src/components/views/settings/tabs/room/RolesRoomSettingsTab";
+import { mkStubRoom, stubClient } from "../../../../../test-utils";
+import { MatrixClientPeg } from "../../../../../../src/MatrixClientPeg";
+import { VoiceBroadcastInfoEventType } from "../../../../../../src/voice-broadcast";
+
+describe("RolesRoomSettingsTab", () => {
+    const roomId = "!room:example.com";
+    let rolesRoomSettingsTab: RenderResult;
+    let cli: MatrixClient;
+
+    const getVoiceBroadcastsSelect = () => {
+        return rolesRoomSettingsTab.container.querySelector("select[label='Voice broadcasts']");
+    };
+
+    const getVoiceBroadcastsSelectedOption = () => {
+        return rolesRoomSettingsTab.container.querySelector("select[label='Voice broadcasts'] option:checked");
+    };
+
+    beforeEach(() => {
+        stubClient();
+        cli = MatrixClientPeg.get();
+        rolesRoomSettingsTab = render(<RolesRoomSettingsTab roomId={roomId} />);
+        mkStubRoom(roomId, "test room", cli);
+    });
+
+    it("should initially show »Moderator« permission for »Voice broadcasts«", () => {
+        expect(getVoiceBroadcastsSelectedOption().textContent).toBe("Moderator");
+    });
+
+    describe("when setting »Default« permission for »Voice broadcasts«", () => {
+        beforeEach(() => {
+            fireEvent.change(getVoiceBroadcastsSelect(), {
+                target: { value: 0 },
+            });
+        });
+
+        it("should update the power levels", () => {
+            expect(cli.sendStateEvent).toHaveBeenCalledWith(
+                roomId,
+                EventType.RoomPowerLevels,
+                {
+                    events: {
+                        [VoiceBroadcastInfoEventType]: 0,
+                    },
+                },
+            );
+        });
+    });
+});