Wire local room logic (#9078)

* Wire local room logic

* Migrate to testling-lib; update test descriptions

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

@@ -0,0 +1,131 @@
+/*
+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 { mocked } from "jest-mock";
+import { MatrixClient, MatrixEvent, Room } from "matrix-js-sdk/src/matrix";
+import { render, screen } from '@testing-library/react';
+
+import EncryptionEvent from "../../../../src/components/views/messages/EncryptionEvent";
+import { createTestClient, mkMessage } from "../../../test-utils";
+import { MatrixClientPeg } from '../../../../src/MatrixClientPeg';
+import { LocalRoom } from '../../../../src/models/LocalRoom';
+import DMRoomMap from '../../../../src/utils/DMRoomMap';
+import MatrixClientContext from '../../../../src/contexts/MatrixClientContext';
+
+const renderEncryptionEvent = (client: MatrixClient, event: MatrixEvent) => {
+    render(<MatrixClientContext.Provider value={client}>
+        <EncryptionEvent mxEvent={event} />
+    </MatrixClientContext.Provider>);
+};
+
+const checkTexts = (title: string, subTitle: string) => {
+    screen.getByText(title);
+    screen.getByText(subTitle);
+};
+
+describe("EncryptionEvent", () => {
+    const roomId = "!room:example.com";
+    const algorithm = "m.megolm.v1.aes-sha2";
+    let client: MatrixClient;
+    let event: MatrixEvent;
+
+    beforeEach(() => {
+        jest.clearAllMocks();
+        client = createTestClient();
+        jest.spyOn(MatrixClientPeg, "get").mockReturnValue(client);
+        event = mkMessage({
+            event: true,
+            room: roomId,
+            user: client.getUserId(),
+        });
+        jest.spyOn(DMRoomMap, "shared").mockReturnValue({
+            getUserIdForRoomId: jest.fn(),
+        } as unknown as DMRoomMap);
+    });
+
+    describe("for an encrypted room", () => {
+        beforeEach(() => {
+            event.event.content.algorithm = algorithm;
+            mocked(client.isRoomEncrypted).mockReturnValue(true);
+            const room = new Room(roomId, client, client.getUserId());
+            mocked(client.getRoom).mockReturnValue(room);
+        });
+
+        it("should show the expected texts", () => {
+            renderEncryptionEvent(client, event);
+            checkTexts(
+                "Encryption enabled",
+                "Messages in this room are end-to-end encrypted. "
+                + "When people join, you can verify them in their profile, just tap on their avatar.",
+            );
+        });
+
+        describe("with same previous algorithm", () => {
+            beforeEach(() => {
+                jest.spyOn(event, "getPrevContent").mockReturnValue({
+                    algorithm: algorithm,
+                });
+            });
+
+            it("should show the expected texts", () => {
+                renderEncryptionEvent(client, event);
+                checkTexts(
+                    "Encryption enabled",
+                    "Some encryption parameters have been changed.",
+                );
+            });
+        });
+
+        describe("with unknown algorithm", () => {
+            beforeEach(() => {
+                event.event.content.algorithm = "unknown";
+            });
+
+            it("should show the expected texts", () => {
+                renderEncryptionEvent(client, event);
+                checkTexts("Encryption enabled", "Ignored attempt to disable encryption");
+            });
+        });
+    });
+
+    describe("for an unencrypted room", () => {
+        beforeEach(() => {
+            mocked(client.isRoomEncrypted).mockReturnValue(false);
+            renderEncryptionEvent(client, event);
+        });
+
+        it("should show the expected texts", () => {
+            expect(client.isRoomEncrypted).toHaveBeenCalledWith(roomId);
+            checkTexts("Encryption not enabled", "The encryption used by this room isn't supported.");
+        });
+    });
+
+    describe("for an encrypted local room", () => {
+        beforeEach(() => {
+            event.event.content.algorithm = algorithm;
+            mocked(client.isRoomEncrypted).mockReturnValue(true);
+            const localRoom = new LocalRoom(roomId, client, client.getUserId());
+            mocked(client.getRoom).mockReturnValue(localRoom);
+            renderEncryptionEvent(client, event);
+        });
+
+        it("should show the expected texts", () => {
+            expect(client.isRoomEncrypted).toHaveBeenCalledWith(roomId);
+            checkTexts("Encryption enabled", "Messages in this chat will be end-to-end encrypted.");
+        });
+    });
+});