test : MM-T2465 Linux Dark Mode Toggle (#1981)

e2e/specs/linux_dark_mode.test.js

@@ -0,0 +1,64 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+'use strict';
+
+const fs = require('fs');
+
+const robot = require('robotjs');
+
+const env = require('../modules/environment');
+const {asyncSleep} = require('../modules/utils');
+
+describe('dark_mode', function desc() {
+    this.timeout(30000);
+
+    const config = env.demoConfig;
+
+    beforeEach(async () => {
+        env.cleanDataDir();
+        env.createTestUserDataDir();
+        env.cleanTestConfig();
+        fs.writeFileSync(env.configFilePath, JSON.stringify(config));
+        await asyncSleep(1000);
+        this.app = await env.getApp();
+        this.serverMap = await env.getServerMap(this.app);
+    });
+
+    afterEach(async () => {
+        if (this.app) {
+            await this.app.close();
+        }
+    });
+
+    if (process.platform !== 'darwin') {
+        it('MM-T2465 Linux Dark Mode Toggle', async () => {
+            const mainWindow = this.app.windows().find((window) => window.url().includes('index'));
+            mainWindow.should.not.be.null;
+
+            // Toggle Dark Mode
+            toggleDarkMode();
+
+            const topBarElementWithDarkMode = await mainWindow.waitForSelector('.topBar');
+            const topBarElementClassWithDarkMode = await topBarElementWithDarkMode.getAttribute('class');
+
+            topBarElementClassWithDarkMode.should.contain('topBar darkMode row');
+
+            // Toggle Light Mode
+            toggleDarkMode();
+
+            const topBarElementWithLightMode = await mainWindow.waitForSelector('.topBar');
+            const topBarElementClassWithLightMode = await topBarElementWithLightMode.getAttribute('class');
+
+            topBarElementClassWithLightMode.should.contain('topBar row');
+        });
+    }
+});
+
+function toggleDarkMode() {
+    robot.keyTap('alt');
+    robot.keyTap('enter');
+    robot.keyTap('v');
+    robot.keyTap('t');
+    robot.keyTap('t'); // Click on "Toggle Dark Mode" menu item
+    robot.keyTap('enter');
+}