Write additional tests (#22802)

* Write additional tests

* Make Sonar happier

src/favicon.ts

@@ -54,7 +54,7 @@ export default class Favicon {
 
     private isReady = false;
     // callback to run once isReady is asserted, allows for a badge to be queued for when it can be shown
-    private readyCb = () => {};
+    private readyCb?: () => void;
 
     constructor(params: Partial<IParams> = {}) {
         this.params = { ...defaults, ...params };
@@ -180,7 +180,7 @@ export default class Favicon {
     private ready() {
         if (this.isReady) return;
         this.isReady = true;
-        this.readyCb();
+        this.readyCb?.();
     }
 
     private setIcon(canvas) {
@@ -230,9 +230,9 @@ export default class Favicon {
     private static getLinks() {
         const icons: HTMLLinkElement[] = [];
         const links = window.document.getElementsByTagName("head")[0].getElementsByTagName("link");
-        for (let i = 0; i < links.length; i++) {
-            if ((/(^|\s)icon(\s|$)/i).test(links[i].getAttribute("rel"))) {
-                icons.push(links[i]);
+        for (const link of links) {
+            if ((/(^|\s)icon(\s|$)/i).test(link.getAttribute("rel"))) {
+                icons.push(link);
             }
         }
         return icons;

src/vector/init.tsx

@@ -92,8 +92,8 @@ export function loadOlm(): Promise<void> {
         locateFile: () => olmWasmPath,
     }).then(() => {
         logger.log("Using WebAssembly Olm");
-    }).catch((e) => {
-        logger.log("Failed to load Olm: trying legacy version", e);
+    }).catch((wasmLoadError) => {
+        logger.log("Failed to load Olm: trying legacy version", wasmLoadError);
         return new Promise((resolve, reject) => {
             const s = document.createElement('script');
             s.src = 'olm_legacy.js'; // XXX: This should be cache-busted too
@@ -106,8 +106,8 @@ export function loadOlm(): Promise<void> {
             return window.Olm.init();
         }).then(() => {
             logger.log("Using legacy Olm");
-        }).catch((e) => {
-            logger.log("Both WebAssembly and asm.js Olm failed!", e);
+        }).catch((legacyLoadError) => {
+            logger.log("Both WebAssembly and asm.js Olm failed!", legacyLoadError);
         });
     });
 }

src/vector/platform/IPCManager.ts

@@ -48,7 +48,7 @@ export class IPCManager {
         return deferred.promise;
     }
 
-    private onIpcReply = (ev: {}, payload: IPCPayload): void => {
+    private onIpcReply = (_ev: {}, payload: IPCPayload): void => {
         if (payload.id === undefined) {
             logger.warn("Ignoring IPC reply with no ID");
             return;

src/vector/platform/VectorBasePlatform.ts

@@ -47,7 +47,8 @@ export default abstract class VectorBasePlatform extends BasePlatform {
         if (this._favicon) {
             return this._favicon;
         }
-        return this._favicon = new Favicon();
+        this._favicon = new Favicon();
+        return this._favicon;
     }
 
     private updateFavicon() {

src/vector/platform/WebPlatform.ts

@@ -80,7 +80,7 @@ export default class WebPlatform extends VectorBasePlatform {
         // annoyingly, the latest spec says this returns a
         // promise, but this is only supported in Chrome 46
         // and Firefox 47, so adapt the callback API.
-        return new Promise(function(resolve, reject) {
+        return new Promise(function(resolve) {
             window.Notification.requestPermission((result) => {
                 resolve(result);
             });

src/vector/rageshakesetup.ts

@@ -39,7 +39,7 @@ export function initRageshake() {
         logger.log("To fix line numbers in Chrome: " +
             "Meatball menu → Settings → Ignore list → Add /rageshake\\.js$");
 
-        window.addEventListener('beforeunload', (e) => {
+        window.addEventListener('beforeunload', () => {
             logger.log('element-web closing');
             // try to flush the logs to indexeddb
             rageshake.flush();

src/vector/routing.ts

@@ -41,7 +41,7 @@ function routeUrl(location: Location) {
     (window.matrixChat as MatrixChatType).showScreen(s.screen, s.params);
 }
 
-function onHashChange(ev: HashChangeEvent) {
+function onHashChange() {
     if (decodeURIComponent(window.location.hash) === lastLocationHashSet) {
         // we just set this: no need to route it!
         return;

test/unit-tests/vector/getconfig-test.ts

@@ -119,4 +119,12 @@ describe('getVectorConfig()', () => {
         await expect(() => getVectorConfig()).rejects.toEqual({"err": "err-general", "response": undefined});
     });
 
+    it('rejects with an error when config is invalid JSON', async () => {
+        setRequestMockImplementationOnce('err-specific');
+        setRequestMockImplementationOnce(undefined, { status: 200 }, '{"invalid": "json",}');
+
+        await expect(() => getVectorConfig()).rejects.toEqual({
+            err: new SyntaxError("Unexpected token } in JSON at position 19"),
+        });
+    });
 });

test/unit-tests/vector/platform/PWAPlatform-test.ts

@@ -0,0 +1,33 @@
+/*
+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 PWAPlatform from "../../../../src/vector/platform/PWAPlatform";
+
+describe('PWAPlatform', () => {
+    beforeEach(() => {
+        jest.clearAllMocks();
+    });
+
+    describe("setNotificationCount", () => {
+        it("should call Navigator::setAppBadge", () => {
+            navigator.setAppBadge = jest.fn().mockResolvedValue(undefined);
+            const platform = new PWAPlatform();
+            expect(navigator.setAppBadge).not.toHaveBeenCalled();
+            platform.setNotificationCount(123);
+            expect(navigator.setAppBadge).toHaveBeenCalledWith(123);
+        });
+    });
+});

test/unit-tests/vector/platform/WebPlatform-test.ts

@@ -30,6 +30,13 @@ describe('WebPlatform', () => {
         expect(platform.getHumanReadableName()).toEqual('Web Platform');
     });
 
+    it('registers service worker', () => {
+        // @ts-ignore - mocking readonly object
+        navigator.serviceWorker = { register: jest.fn() };
+        new WebPlatform();
+        expect(navigator.serviceWorker.register).toHaveBeenCalled();
+    });
+
     describe('notification support', () => {
         const mockNotification = {
             requestPermission: jest.fn(),
@@ -109,7 +116,6 @@ describe('WebPlatform', () => {
         });
 
         describe('pollForUpdate()', () => {
-            
             it('should return not available and call showNoUpdate when current version matches most recent version', async () => {
                 process.env.VERSION = prodVersion;
                 setRequestMockImplementation(undefined, { status: 200}, prodVersion);
@@ -181,6 +187,5 @@ describe('WebPlatform', () => {
                 expect(showNoUpdate).not.toHaveBeenCalled();
             });
         });
-
     });
 });