Add MessageEvent voice broadcast setting watch (#9399)

test/components/views/messages/MessageEvent-test.tsx

@@ -0,0 +1,133 @@
+/*
+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 { render, RenderResult } from "@testing-library/react";
+import { mocked } from "jest-mock";
+import { MatrixClient, MatrixEvent, Room } from "matrix-js-sdk/src/matrix";
+
+import { Features } from "../../../../src/settings/Settings";
+import SettingsStore, { CallbackFn } from "../../../../src/settings/SettingsStore";
+import { VoiceBroadcastInfoEventType, VoiceBroadcastInfoState } from "../../../../src/voice-broadcast";
+import { mkEvent, mkRoom, stubClient } from "../../../test-utils";
+import MessageEvent from "../../../../src/components/views/messages/MessageEvent";
+import { RoomPermalinkCreator } from "../../../../src/utils/permalinks/Permalinks";
+
+jest.mock("../../../../src/components/views/messages/UnknownBody", () => ({
+    __esModule: true,
+    default: () => (<div data-testid="unknown-body" />),
+}));
+
+jest.mock("../../../../src/voice-broadcast/components/VoiceBroadcastBody", () => ({
+    VoiceBroadcastBody: () => (<div data-testid="voice-broadcast-body" />),
+}));
+
+describe("MessageEvent", () => {
+    let room: Room;
+    let client: MatrixClient;
+    let event: MatrixEvent;
+
+    const renderMessageEvent = (): RenderResult => {
+        return render(<MessageEvent
+            mxEvent={event}
+            onHeightChanged={jest.fn()}
+            permalinkCreator={new RoomPermalinkCreator(room)}
+        />);
+    };
+
+    beforeEach(() => {
+        client = stubClient();
+        room = mkRoom(client, "!room:example.com");
+        jest.spyOn(SettingsStore, "getValue");
+        jest.spyOn(SettingsStore, "watchSetting");
+        jest.spyOn(SettingsStore, "unwatchSetting").mockImplementation(jest.fn());
+    });
+
+    describe("when a voice broadcast start event occurs", () => {
+        const voiceBroadcastSettingWatcherRef = "vb ref";
+        let onVoiceBroadcastSettingChanged: CallbackFn;
+
+        beforeEach(() => {
+            event = mkEvent({
+                event: true,
+                type: VoiceBroadcastInfoEventType,
+                user: client.getUserId(),
+                room: room.roomId,
+                content: {
+                    state: VoiceBroadcastInfoState.Started,
+                },
+            });
+
+            mocked(SettingsStore.watchSetting).mockImplementation(
+                (settingName: string, roomId: string | null, callbackFn: CallbackFn) => {
+                    if (settingName === Features.VoiceBroadcast) {
+                        onVoiceBroadcastSettingChanged = callbackFn;
+                        return voiceBroadcastSettingWatcherRef;
+                    }
+                },
+            );
+        });
+
+        describe("and the voice broadcast feature is enabled", () => {
+            let result: RenderResult;
+
+            beforeEach(() => {
+                mocked(SettingsStore.getValue).mockImplementation((settingName: string) => {
+                    return settingName === Features.VoiceBroadcast;
+                });
+                result = renderMessageEvent();
+            });
+
+            it("should render a VoiceBroadcast component", () => {
+                result.getByTestId("voice-broadcast-body");
+            });
+
+            describe("and switching the voice broadcast feature off", () => {
+                beforeEach(() => {
+                    onVoiceBroadcastSettingChanged(Features.VoiceBroadcast, null, null, null, false);
+                });
+
+                it("should render an UnknownBody component", () => {
+                    const result = renderMessageEvent();
+                    result.getByTestId("unknown-body");
+                });
+            });
+
+            describe("and unmounted", () => {
+                beforeEach(() => {
+                    result.unmount();
+                });
+
+                it("should unregister the settings watcher", () => {
+                    expect(SettingsStore.unwatchSetting).toHaveBeenCalled();
+                });
+            });
+        });
+
+        describe("and the voice broadcast feature is disabled", () => {
+            beforeEach(() => {
+                mocked(SettingsStore.getValue).mockImplementation((settingName: string) => {
+                    return false;
+                });
+            });
+
+            it("should render an UnknownBody component", () => {
+                const result = renderMessageEvent();
+                result.getByTestId("unknown-body");
+            });
+        });
+    });
+});