cypress-io · jennifer-shehane · May 2, 2024 · Apr 30, 2024 · Apr 30, 2024 · Apr 30, 2024
diff --git a/cli/CHANGELOG.md b/cli/CHANGELOG.md
@@ -7,6 +7,10 @@ _Released 5/7/2024 (PENDING)_
 
 - Added more descriptive error messages when Test Replay fails to record or upload. Addresses [#29022](https://github.com/cypress-io/cypress/issues/29022).
 
+**Bugfixes:**
+
+- We now pass the same default Chromium flags to Electron as we do to Chrome. As a result of this change, the application under test's `navigator.webdriver` property will now correctly be `true` when testing in Electron. Fixes [#27939](https://github.com/cypress-io/cypress/issues/27939).
+
 **Dependency Updates:**
 
 - Updated electron from `27.1.3` to `27.3.10` to address [CVE-2024-3156](https://nvd.nist.gov/vuln/detail/CVE-2024-3156). Addressed in [#29367](https://github.com/cypress-io/cypress/pull/29367).

diff --git a/packages/driver/cypress/e2e/issues/27939.cy.js b/packages/driver/cypress/e2e/issues/27939.cy.js
@@ -0,0 +1,8 @@
+// Chrome, Firefox, and Electron all have navigator.webdriver set to true in Cypress tests.
+// TODO: Webkit should have this set, this needs to be fixed https://github.com/cypress-io/cypress/issues/29446
+// https://w3c.github.io/webdriver/#interface
+// https://github.com/cypress-io/cypress/issues/27939
+it('visit', { browser: '!webkit' }, () => {
+  cy.visit('/fixtures/issue-27939.html')
+  cy.get('#content').should('have.text', 'navigator.webdriver is true')
+})
diff --git a/packages/driver/cypress/fixtures/issue-27939.html b/packages/driver/cypress/fixtures/issue-27939.html
@@ -0,0 +1,10 @@
+<html>
+
+<body>
+  <h1 id="content"></h1>
+  <script>
+    var text = document.createTextNode(`navigator.webdriver is ${!!navigator.webdriver}`);
+    document.getElementById("content").append(text);
+  </script>
+</body>
+</html>
diff --git a/packages/server/lib/browsers/chrome.ts b/packages/server/lib/browsers/chrome.ts
@@ -23,6 +23,7 @@ import memory from './memory'
 
 import type { BrowserLaunchOpts, BrowserNewTabOpts, ProtocolManagerShape, RunModeVideoApi } from '@packages/types'
 import type { CDPSocketServer } from '@packages/socket/lib/cdp-socket'
+import { DEFAULT_CHROME_FLAGS } from '../util/chromium_flags'
 
 const debug = debugModule('cypress:server:browsers:chrome')
 
@@ -47,98 +48,6 @@ type ChromePreferences = {
 const pathToExtension = extension.getPathToV3Extension()
 const pathToTheme = extension.getPathToTheme()
 
-const disabledFeatures = [
-  // Disable manual option and popup prompt of Chrome translation
-  // https://github.com/cypress-io/cypress/issues/28225
-  'Translate',
-  // Disables "Enhanced ad privacy in Chrome" dialog
-  // https://github.com/cypress-io/cypress/issues/29199
-  'PrivacySandboxSettings4',
-]
-
-// Common Chrome Flags for Automation
-// https://github.com/GoogleChrome/chrome-launcher/blob/master/docs/chrome-flags-for-tools.md
-const DEFAULT_ARGS = [
-  '--test-type',
-  '--ignore-certificate-errors',
-  '--start-maximized',
-  '--silent-debugger-extension-api',
-  '--no-default-browser-check',
-  '--no-first-run',
-  '--noerrdialogs',
-  '--enable-fixed-layout',
-  '--disable-popup-blocking',
-  '--disable-password-generation',
-  '--disable-single-click-autofill',
-  '--disable-prompt-on-repos',
-  '--disable-background-timer-throttling',
-  '--disable-renderer-backgrounding',
-  '--disable-renderer-throttling',
-  '--disable-backgrounding-occluded-windows',
-  '--disable-restore-session-state',
-  '--disable-new-profile-management',
-  '--disable-new-avatar-menu',
-  '--allow-insecure-localhost',
-  '--reduce-security-for-testing',
-  '--enable-automation',
-  '--disable-print-preview',
-  '--disable-component-extensions-with-background-pages',
-
-  '--disable-device-discovery-notifications',
-
-  // https://github.com/cypress-io/cypress/issues/2376
-  '--autoplay-policy=no-user-gesture-required',
-
-  // http://www.chromium.org/Home/chromium-security/site-isolation
-  // https://github.com/cypress-io/cypress/issues/1951
-  '--disable-site-isolation-trials',
-
-  // the following come from chromedriver
-  // https://code.google.com/p/chromium/codesearch#chromium/src/chrome/test/chromedriver/chrome_launcher.cc&sq=package:chromium&l=70
-  '--metrics-recording-only',
-  '--disable-prompt-on-repost',
-  '--disable-hang-monitor',
-  '--disable-sync',
-  // this flag is causing throttling of XHR callbacks for
-  // as much as 30 seconds. If you VNC in and open dev tools or
-  // click on a button, it'll "instantly" work. with this
-  // option enabled, it will time out some of our tests in circle
-  // "--disable-background-networking"
-  '--disable-web-resources',
-  '--safebrowsing-disable-download-protection',
-  '--disable-client-side-phishing-detection',
-  '--disable-component-update',
-  // Simulate when chrome needs an update.
-  // This prevents an 'update' from displaying til the given date
-  `--simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT'`,
-  '--disable-default-apps',
-
-  `--disable-features=${disabledFeatures.join(',')}`,
-
-  // These flags are for webcam/WebRTC testing
-  // https://github.com/cypress-io/cypress/issues/2704
-  '--use-fake-ui-for-media-stream',
-  '--use-fake-device-for-media-stream',
-
-  // so Cypress commands don't get throttled
-  // https://github.com/cypress-io/cypress/issues/5132
-  '--disable-ipc-flooding-protection',
-
-  // misc. options puppeteer passes
-  // https://github.com/cypress-io/cypress/issues/3633
-  '--disable-backgrounding-occluded-window',
-  '--disable-breakpad',
-  '--password-store=basic',
-  '--use-mock-keychain',
-
-  // write shared memory files into '/tmp' instead of '/dev/shm'
-  // https://github.com/cypress-io/cypress/issues/5336
-  '--disable-dev-shm-usage',
-
-  // enable precise memory info so performance.memory returns more accurate values
-  '--enable-precise-memory-info',
-]
-
 let browserCriClient: BrowserCriClient | undefined
 
 /**
@@ -384,7 +293,7 @@ export = {
   },
 
   _getArgs (browser: Browser, options: BrowserLaunchOpts, port: string) {
-    const args = ([] as string[]).concat(DEFAULT_ARGS)
+    const args = ([] as string[]).concat(DEFAULT_CHROME_FLAGS)
 
     if (os.platform() === 'linux') {
       args.push('--disable-gpu')

diff --git a/packages/server/lib/environment.js b/packages/server/lib/environment.js
@@ -1,4 +1,5 @@
 require('./util/fs')
+const DEFAULT_ELECTRON_FLAGS = require('./util/chromium_flags').DEFAULT_ELECTRON_FLAGS
 
 const os = require('os')
 
@@ -43,31 +44,10 @@ try {
     app,
   } = require('electron')
 
-  app.commandLine.appendSwitch('disable-renderer-backgrounding', true)
-  app.commandLine.appendSwitch('ignore-certificate-errors', true)
-
-  // These flags are for webcam/WebRTC testing
-  // https://github.com/cypress-io/cypress/issues/2704
-  app.commandLine.appendSwitch('use-fake-ui-for-media-stream')
-  app.commandLine.appendSwitch('use-fake-device-for-media-stream')
-
-  // https://github.com/cypress-io/cypress/issues/2376
-  app.commandLine.appendSwitch('autoplay-policy', 'no-user-gesture-required')
-
-  // allows webSecurity: false to work as expected in webPreferences
-  // https://github.com/electron/electron/issues/18214
-  app.commandLine.appendSwitch('disable-site-isolation-trials')
-
-  // prevent electron from using /dev/shm, which can cause crashes in Docker
-  // https://github.com/cypress-io/cypress/issues/15814
-  app.commandLine.appendSwitch('disable-dev-shm-usage')
-
-  // prevent navigation throttling when navigating in the browser rapid fire
-  // https://github.com/cypress-io/cypress/pull/20271
-  app.commandLine.appendSwitch('disable-ipc-flooding-protection')
-
-  // ensure we get the most accurate memory usage
-  app.commandLine.appendSwitch('enable-precise-memory-info')
+  debug('appending default switches for electron: %O', DEFAULT_ELECTRON_FLAGS)
+  DEFAULT_ELECTRON_FLAGS.forEach(({ name, value }) => {
+    value ? app.commandLine.appendSwitch(name, value) : app.commandLine.appendSwitch(name)
+  })
 
   if (os.platform() === 'linux') {
     app.disableHardwareAcceleration()

diff --git a/packages/server/lib/util/chromium_flags.ts b/packages/server/lib/util/chromium_flags.ts
@@ -0,0 +1,111 @@
+const disabledFeatures = [
+  // Disable manual option and popup prompt of Chrome translation
+  // https://github.com/cypress-io/cypress/issues/28225
+  'Translate',
+  // Disables "Enhanced ad privacy in Chrome" dialog
+  // https://github.com/cypress-io/cypress/issues/29199
+  'PrivacySandboxSettings4',
+]
+
+// Common Chrome Flags for Automation
+// https://github.com/GoogleChrome/chrome-launcher/blob/master/docs/chrome-flags-for-tools.md
+const DEFAULT_FLAGS = [
+  'test-type',
+  'ignore-certificate-errors',
+  'start-maximized',
+  'silent-debugger-extension-api',
+  'no-default-browser-check',
+  'no-first-run',
+  'noerrdialogs',
+  'enable-fixed-layout',
+  'disable-popup-blocking',
+  'disable-password-generation',
+  'disable-single-click-autofill',
+  'disable-prompt-on-repos',
+  'disable-background-timer-throttling',
+  'disable-renderer-backgrounding',
+  'disable-renderer-throttling',
+  'disable-backgrounding-occluded-windows',
+  'disable-restore-session-state',
+  'disable-new-profile-management',
+  'disable-new-avatar-menu',
+  'allow-insecure-localhost',
+  'reduce-security-for-testing',
+  'enable-automation',
+  'disable-print-preview',
+  'disable-component-extensions-with-background-pages',
+
+  'disable-device-discovery-notifications',
+
+  // https://github.com/cypress-io/cypress/issues/2376
+  'autoplay-policy=no-user-gesture-required',
+
+  // http://www.chromium.org/Home/chromium-security/site-isolation
+  // https://github.com/electron/electron/issues/18214
+  // https://github.com/cypress-io/cypress/issues/1951
+  'disable-site-isolation-trials',
+
+  // the following come from chromedriver
+  // https://code.google.com/p/chromium/codesearch#chromium/src/chrome/test/chromedriver/chrome_launcher.cc&sq=package:chromium&l=70
+  'metrics-recording-only',
+  'disable-prompt-on-repost',
+  'disable-hang-monitor',
+  'disable-sync',
+  // this flag is causing throttling of XHR callbacks for
+  // as much as 30 seconds. If you VNC in and open dev tools or
+  // click on a button, it'll "instantly" work. with this
+  // option enabled, it will time out some of our tests in circle
+  // "disable-background-networking"
+  'disable-web-resources',
+  'safebrowsing-disable-download-protection',
+  'disable-client-side-phishing-detection',
+  'disable-component-update',
+  // Simulate when chrome needs an update.
+  // This prevents an 'update' from displaying til the given date
+  `simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT'`,
+  'disable-default-apps',
+
+  `disable-features=${disabledFeatures.join(',')}`,
+
+  // These flags are for webcam/WebRTC testing
+  // https://github.com/cypress-io/cypress/issues/2704
+  'use-fake-ui-for-media-stream',
+  'use-fake-device-for-media-stream',
+
+  // prevent navigation throttling when navigating in the browser rapid fire
+  // https://github.com/cypress-io/cypress/issues/5132
+  // https://github.com/cypress-io/cypress/pull/20271
+  'disable-ipc-flooding-protection',
+
+  // misc. options puppeteer passes
+  // https://github.com/cypress-io/cypress/issues/3633
+  'disable-backgrounding-occluded-window',
+  'disable-breakpad',
+  'password-store=basic',
+  'use-mock-keychain',
+
+  // write shared memory files into '/tmp' instead of '/dev/shm'
+  // https://github.com/cypress-io/cypress/issues/5336
+  // https://github.com/cypress-io/cypress/issues/15814
+  'disable-dev-shm-usage',
+
+  // enable precise memory info so performance.memory returns more accurate values
+  'enable-precise-memory-info',
+]
+
+// prepend -- to each flag and concatenate them together
+export const formatChromeFlags = (flags) => flags.map((flag) => `--${flag}`)
+
+// create an array of objects with name and value properties
+// for each flag, splitting the flag on the first = character
+export const formatElectronFlags = (flags) => {
+  return flags.map((flag) => {
+    const [name, value] = flag.split('=')
+
+    return value ? { name, value } : { name }
+  })
+}
+
+export const DEFAULT_CHROME_FLAGS = formatChromeFlags(DEFAULT_FLAGS)
+
+export const DEFAULT_ELECTRON_FLAGS = formatElectronFlags(DEFAULT_CHROME_FLAGS)
diff --git a/packages/server/test/unit/util/chromium_flags_spec.js b/packages/server/test/unit/util/chromium_flags_spec.js
@@ -0,0 +1,30 @@
+require('../../spec_helper')
+
+const { formatChromeFlags, formatElectronFlags } = require(`../../../lib/util/chromium_flags`)
+
+describe('lib/util/chromium_flags', () => {
+  context('#formatChromeFlags', () => {
+    it('formats flags with --', () => {
+      const flags = ['one', 'two', 'three']
+      const chromeFlags = formatChromeFlags(flags)
+
+      expect(chromeFlags).to.deep.eq(['--one', '--two', '--three'])
+    })
+  })
+
+  context('#formatElectronFlags', () => {
+    it('formats flags as objects with name', () => {
+      const flags = ['one', 'two', 'three']
+      const electronFlags = formatElectronFlags(flags)
+
+      expect(electronFlags).to.deep.eq([{ name: 'one' }, { name: 'two' }, { name: 'three' }])
+    })
+
+    it('formats flags as objects with name/value pairs', () => {
+      const flags = ['one=1', 'two=2', 'three']
+      const electronFlags = formatElectronFlags(flags)
+
+      expect(electronFlags).to.deep.eq([{ name: 'one', value: '1' }, { name: 'two', value: '2' }, { name: 'three' }])
+    })
+  })
+})