text: const assert = require('assert')
  const fs = require('fs')
  const http = require('http')
  const path = require('path')
  const ws = require('ws')
  const url = require('url')
  const {ipcRenderer, remote, webFrame} = require('electron')
  const {closeWindow} = require('./window-helpers')
  
  const {app, BrowserWindow, ipcMain, protocol, session, webContents} = remote
  
  const isCI = remote.getGlobal('isCi')
  
  describe('chromium feature', function () {
    var fixtures = path.resolve(__dirname, 'fixtures')
    var listener = null
    let w = null
  
    afterEach(function () {
      if (listener != null) {
        window.removeEventListener('message', listener)
      }
      listener = null
    })
  
    afterEach(function () {
      return closeWindow(w).then(function () { w = null })
    })
  
    describe('heap snapshot', function () {
      it('does not crash', function () {
        if (process.env.TRAVIS === 'true') return
        process.atomBinding('v8_util').takeHeapSnapshot()
      })
    })
  
    describe('sending request of http protocol urls', function () {
      it('does not crash', function (done) {
        var server = http.createServer(function (req, res) {
          res.end()
          server.close()
          done()
        })
        server.listen(0, '127.0.0.1', function () {
          var port = server.address().port
          $.get('http://127.0.0.1:' + port)
        })
      })
    })
  
    xdescribe('navigator.webkitGetUserMedia', function () {
      it('calls its callbacks', function (done) {
        navigator.webkitGetUserMedia({
          audio: true,
          video: false
        }, function () {
          done()
        }, function () {
          done()
        })
      })
    })
  
    describe('navigator.mediaDevices', function () {
      if (isCI) {
        return
      }
  
      it('can return labels of enumerated devices', function (done) {
        navigator.mediaDevices.enumerateDevices().then((devices) => {
          const labels = devices.map((device) => device.label)
          const labelFound = labels.some((label) => !!label)
          if (labelFound) {
            done()
          } else {
            done(new Error(`No device labels found: ${JSON.stringify(labels)}`))
          }
        }).catch(done)
      })
  
      it('can return new device id when cookie storage is cleared', function (done) {
        const options = {
          origin: null,
          storages: ['cookies']
        }
        const deviceIds = []
        const ses = session.fromPartition('persist:media-device-id')
        w = new BrowserWindow({
          show: false,
          webPreferences: {
            session: ses
          }
        })
        w.webContents.on('ipc-message', function (event, args) {
          if (args[0] === 'deviceIds') {
            deviceIds.push(args[1])
          }
          if (deviceIds.length === 2) {
            assert.notDeepEqual(deviceIds[0], deviceIds[1])
            closeWindow(w).then(function () {
              w = null
              done()
            }).catch(function (error) {
              done(error)
            })
          } else {
            ses.clearStorageData(options, function () {
              w.webContents.reload()
            })
          }
        })
        w.loadURL('file://' + fixtures + '/pages/media-id-reset.html')
      })
    })
  
    describe('navigator.language', function () {
      it('should not be empty', function () {
        assert.notEqual(navigator.language, '')
      })
    })
  
    describe('navigator.serviceWorker', function () {
      it('should register for file scheme', function (done) {
        w = new BrowserWindow({
          show: false
        })
        w.webContents.on('ipc-message', function (event, args) {
          if (args[0] === 'reload') {
            w.webContents.reload()
          } else if (args[0] === 'error') {
            done('unexpected error : ' + args[1])
          } else if (args[0] === 'response') {
            assert.equal(args[1], 'Hello from serviceWorker!')
            session.defaultSession.clearStorageData({
              storages: ['serviceworkers']
            }, function () {
              done()
            })
          }
        })
        w.loadURL(`file://${fixtures}/pages/service-worker/index.html`)
      })
  
      it('should register for intercepted file scheme', function (done) {
        const customSession = session.fromPartition('intercept-file')
        customSession.protocol.interceptBufferProtocol('file', function (request, callback) {
          let file = url.parse(request.url).pathname
          // Remove leading slash before drive letter on Windows
          if (file[0] === '/' && process.platform === 'win32') {
            file = file.slice(1)
          }
          const content = fs.readFileSync(path.normalize(file))
          const ext = path.extname(file)
          let type = 'text/html'
          if (ext === '.js') {
            type = 'application/javascript'
          }
          callback({data: content, mimeType: type})
        }, function (error) {
          if (error) done(error)
        })
  
        w = new BrowserWindow({
          show: false,
          webPreferences: {
            session: customSession
          }
        })
        w.webContents.on('ipc-message', function (event, args) {
          if (args[0] === 'reload') {
            w.webContents.reload()
          } else if (args[0] === 'error') {
            done('unexpected error : ' + args[1])
          } else if (args[0] === 'response') {
            assert.equal(args[1], 'Hello from serviceWorker!')
            customSession.clearStorageData({
              storages: ['serviceworkers']
            }, function () {
              customSession.protocol.uninterceptProtocol('file', (error) => done(error))
            })
          }
        })
        w.loadURL(`file://${fixtures}/pages/service-worker/index.html`)
      })
    })
  
    describe('window.open', function () {
      if (process.env.TRAVIS === 'true' && process.platform === 'darwin') {
        return
      }
  
      it('returns a BrowserWindowProxy object', function () {
        var b = window.open('about:blank', '', 'show=no')
        assert.equal(b.closed, false)
        assert.equal(b.constructor.name, 'BrowserWindowProxy')
        b.close()
      })
  
      it('accepts "nodeIntegration" as feature', function (done) {
        var b
        listener = function (event) {
          assert.equal(event.data.isProcessGlobalUndefined, true)
          b.close()
          done()
        }
        window.addEventListener('message', listener)
        b = window.open('file://' + fixtures + '/pages/window-opener-node.html', '', 'nodeIntegration=no,show=no')
      })
  
      it('inherit options of parent window', function (done) {
        var b
        listener = function (event) {
          var ref1 = remote.getCurrentWindow().getSize()
          var width = ref1[0]
          var height = ref1[1]
          assert.equal(event.data, 'size: ' + width + ' ' + height)
          b.close()
          done()
        }
        window.addEventListener('message', listener)
        b = window.open('file://' + fixtures + '/pages/window-open-size.html', '', 'show=no')
      })
  
      it('disables node integration when it is disabled on the parent window', function (done) {
        var b
        listener = function (event) {
          assert.equal(event.data.isProcessGlobalUndefined, true)
          b.close()
          done()
        }
        window.addEventListener('message', listener)
  
        var windowUrl = require('url').format({
          pathname: `${fixtures}/pages/window-opener-no-node-integration.html`,
          protocol: 'file',
          query: {
            p: `${fixtures}/pages/window-opener-node.html`
          },
          slashes: true
        })
        b = window.open(windowUrl, '', 'nodeIntegration=no,show=no')
      })
  
      it('disables node integration when it is disabled on the parent window for chrome devtools URLs', function (done) {
        var b
        app.once('web-contents-created', (event, contents) => {
          contents.once('did-finish-load', () => {
            contents.executeJavaScript('typeof process').then((typeofProcessGlobal) => {
              assert.equal(typeofProcessGlobal, 'undefined')
              b.close()
              done()
            }).catch(done)
          })
        })
        b = window.open('chrome-devtools://devtools/bundled/inspector.html', '', 'nodeIntegration=no,show=no')
      })
  
      it('disables JavaScript when it is disabled on the parent window', function (done) {
        var b
        app.once('web-contents-created', (event, contents) => {
          contents.once('did-finish-load', () => {
            app.once('browser-window-created', (event, window) => {
              const preferences = window.webContents.getWebPreferences()
              assert.equal(preferences.javascript, false)
              window.destroy()
              b.close()
              done()
            })
            // Click link on page
            contents.sendInputEvent({type: 'mouseDown', clickCount: 1, x: 1, y: 1})
            contents.sendInputEvent({type: 'mouseUp', clickCount: 1, x: 1, y: 1})
          })
        })
  
        var windowUrl = require('url').format({
          pathname: `${fixtures}/pages/window-no-javascript.html`,
          protocol: 'file',
          slashes: true
        })
        b = window.open(windowUrl, '', 'javascript=no,show=no')
      })
  
      it('disables the <webview> tag when it is disabled on the parent window', function (done) {
        let b
        listener = function (event) {
          assert.equal(event.data.isWebViewGlobalUndefined, true)
          b.close()
          done()
        }
        window.addEventListener('message', listener)
  
        var windowUrl = require('url').format({
          pathname: `${fixtures}/pages/window-opener-no-webview-tag.html`,
          protocol: 'file',
          query: {
            p: `${fixtures}/pages/window-opener-webview.html`
          },
          slashes: true
        })
        b = window.open(windowUrl, '', 'webviewTag=no,nodeIntegration=yes,show=no')
      })
  
      it('does not override child options', function (done) {
        var b, size
        size = {
          width: 350,
          height: 450
        }
        listener = function (event) {
          assert.equal(event.data, 'size: ' + size.width + ' ' + size.height)
          b.close()
          done()
        }
        window.addEventListener('message', listener)
        b = window.open('file://' + fixtures + '/pages/window-open-size.html', '', 'show=no,width=' + size.width + ',height=' + size.height)
      })
  
      it('handles cycles when merging the parent options into the child options', (done) => {
        w = BrowserWindow.fromId(ipcRenderer.sendSync('create-window-with-options-cycle'))
        w.loadURL('file://' + fixtures + '/pages/window-open.html')
        w.webContents.once('new-window', (event, url, frameName, disposition, options) => {
          assert.equal(options.show, false)
          assert.deepEqual(options.foo, {
            bar: null,
            baz: {
              hello: {
                world: true
              }
            },
            baz2: {
              hello: {
                world: true
              }
            }
          })
          done()
        })
      })
  
      it('defines a window.location getter', function (done) {
        var b, targetURL
        if (process.platform === 'win32') {
          targetURL = 'file:///' + fixtures.replace(/\\/g, '/') + '/pages/base-page.html'
        } else {
          targetURL = 'file://' + fixtures + '/pages/base-page.html'
        }
        app.once('browser-window-created', (event, window) => {
          window.webContents.once('did-finish-load', () => {
            assert.equal(b.location, targetURL)
            b.close()
            done()
          })
        })
        b = window.open(targetURL)
      })
  
      it('defines a window.location setter', function (done) {
        let b
        app.once('browser-window-created', (event, {webContents}) => {
          webContents.once('did-finish-load', function () {
            // When it loads, redirect
            b.location = 'file://' + fixtures + '/pages/base-page.html'
            webContents.once('did-finish-load', function () {
              // After our second redirect, cleanup and callback
              b.close()
              done()
            })
          })
        })
        // Load a page that definitely won't redirect
        b = window.open('about:blank')
      })
  
      it('open a blank page when no URL is specified', function (done) {
        let b
        app.once('browser-window-created', (event, {webContents}) => {
          webContents.once('did-finish-load', function () {
            const {location} = b
            b.close()
            assert.equal(location, 'about:blank')
  
            let c
            app.once('browser-window-created', (event, {webContents}) => {
              webContents.once('did-finish-load', function () {
                const {location} = c
                c.close()
                assert.equal(location, 'about:blank')
                done()
              })
            })
            c = window.open('')
          })
        })
        b = window.open()
      })
  
      it('throws an exception when the arguments cannot be converted to strings', function () {
        assert.throws(function () {
          window.open('', {toString: null})
        }, /Cannot convert object to primitive value/)
  
        assert.throws(function () {
          window.open('', '', {toString: 3})
        }, /Cannot convert object to primitive value/)
      })
  
      it('sets the window title to the specified frameName', function (done) {
        let b
        app.once('browser-window-created', (event, createdWindow) => {
          assert.equal(createdWindow.getTitle(), 'hello')
          b.close()
          done()
        })
        b = window.open('', 'hello')
      })
  
      it('does not throw an exception when the frameName is a built-in object property', function (done) {
        let b
        app.once('browser-window-created', (event, createdWindow) => {
          assert.equal(createdWindow.getTitle(), '__proto__')
          b.close()
          done()
        })
        b = window.open('', '__proto__')
      })
  
      it('does not throw an exception when the features include webPreferences', function () {
        let b
        assert.doesNotThrow(function () {
          b = window.open('', '', 'webPreferences=')
        })
        b.close()
      })
    })
  
    describe('window.opener', function () {
      let url = 'file://' + fixtures + '/pages/window-opener.html'
  
      it('is null for main window', function (done) {
        w = new BrowserWindow({
          show: false
        })
        w.webContents.once('ipc-message', function (event, args) {
          assert.deepEqual(args, ['opener', null])
          done()
        })
        w.loadURL(url)
      })
  
      it('is not null for window opened by window.open', function (done) {
        let b
        listener = function (event) {
          assert.equal(event.data, 'object')
          b.close()
          done()
        }
        window.addEventListener('message', listener)
        b = window.open(url, '', 'show=no')
      })
    })
  
    describe('window.opener access from BrowserWindow', function () {
      const scheme = 'other'
      let url = `${scheme}://${fixtures}/pages/window-opener-location.html`
      let w = null
  
      before(function (done) {
        protocol.registerFileProtocol(scheme, function (request, callback) {
          callback(`${fixtures}/pages/window-opener-location.html`)
        }, function (error) {
          done(error)
        })
      })
  
      after(function () {
        protocol.unregisterProtocol(scheme)
      })
  
      afterEach(function () {
        w.close()
      })
  
      it('does nothing when origin of current window does not match opener', function (done) {
        listener = function (event) {
          assert.equal(event.data, undefined)
          done()
        }
        window.addEventListener('message', listener)
        w = window.open(url, '', 'show=no')
      })
  
      it('works when origin matches', function (done) {
        listener = function (event) {
          assert.equal(event.data, location.href)
          done()
        }
        window.addEventListener('message', listener)
        w = window.open(`file://${fixtures}/pages/window-opener-location.html`, '', 'show=no')
      })
  
      it('works when origin does not match opener but has node integration', function (done) {
        listener = function (event) {
          assert.equal(event.data, location.href)
          done()
        }
        window.addEventListener('message', listener)
        w = window.open(url, '', 'show=no,nodeIntegration=yes')
      })
    })
  
    describe('window.opener access from <webview>', function () {
      const scheme = 'other'
      const srcPath = `${fixtures}/pages/webview-opener-postMessage.html`
      const pageURL = `file://${fixtures}/pages/window-opener-location.html`
      let webview = null
  
      before(function (done) {
        protocol.registerFileProtocol(scheme, function (request, callback) {
          callback(srcPath)
        }, function (error) {
          done(error)
        })
      })
  
      after(function () {
        protocol.unregisterProtocol(scheme)
      })
  
      afterEach(function () {
        if (webview != null) webview.remove()
      })
  
      it('does nothing when origin of webview src URL does not match opener', function (done) {
        webview = new WebView()
        webview.addEventListener('console-message', function (e) {
          assert.equal(e.message, 'null')
          done()
        })
        webview.setAttribute('allowpopups', 'on')
        webview.src = url.format({
          pathname: srcPath,
          protocol: scheme,
          query: {
            p: pageURL
          },
          slashes: true
        })
        document.body.appendChild(webview)
      })
  
      it('works when origin matches', function (done) {
        webview = new WebView()
        webview.addEventListener('console-message', function (e) {
          assert.equal(e.message, webview.src)
          done()
        })
        webview.setAttribute('allowpopups', 'on')
        webview.src = url.format({
          pathname: srcPath,
          protocol: 'file',
          query: {
            p: pageURL
          },
          slashes: true
        })
        document.body.appendChild(webview)
      })
  
      it('works when origin does not match opener but has node integration', function (done) {
        webview = new WebView()
        webview.addEventListener('console-message', function (e) {
          webview.remove()
          assert.equal(e.message, webview.src)
          done()
        })
        webview.setAttribute('allowpopups', 'on')
        webview.setAttribute('nodeintegration', 'on')
        webview.src = url.format({
          pathname: srcPath,
          protocol: scheme,
          query: {
            p: pageURL
          },
          slashes: true
        })
        document.body.appendChild(webview)
      })
    })
  
    describe('window.postMessage', function () {
      it('sets the source and origin correctly', function (done) {
        var b
        listener = function (event) {
          window.removeEventListener('message', listener)
          b.close()
          var message = JSON.parse(event.data)
          assert.equal(message.data, 'testing')
          assert.equal(message.origin, 'file://')
          assert.equal(message.sourceEqualsOpener, true)
          assert.equal(event.origin, 'file://')
          done()
        }
        window.addEventListener('message', listener)
        app.once('browser-window-created', (event, {webContents}) => {
          webContents.once('did-finish-load', function () {
            b.postMessage('testing', '*')
          })
        })
        b = window.open('file://' + fixtures + '/pages/window-open-postMessage.html', '', 'show=no')
      })
  
      it('throws an exception when the targetOrigin cannot be converted to a string', function () {
        var b = window.open('')
        assert.throws(function () {
          b.postMessage('test', {toString: null})
        }, /Cannot convert object to primitive value/)
        b.close()
      })
    })
  
    describe('window.opener.postMessage', function () {
      it('sets source and origin correctly', function (done) {
        var b
        listener = function (event) {
          window.removeEventListener('message', listener)
          b.close()
          assert.equal(event.source, b)
          assert.equal(event.origin, 'file://')
          done()
        }
        window.addEventListener('message', listener)
        b = window.open('file://' + fixtures + '/pages/window-opener-postMessage.html', '', 'show=no')
      })
  
      it('supports windows opened from a <webview>', function (done) {
        const webview = new WebView()
        webview.addEventListener('console-message', function (e) {
          webview.remove()
          assert.equal(e.message, 'message')
          done()
        })
        webview.allowpopups = true
        webview.src = url.format({
          pathname: `${fixtures}/pages/webview-opener-postMessage.html`,
          protocol: 'file',
          query: {
            p: `${fixtures}/pages/window-opener-postMessage.html`
          },
          slashes: true
        })
        document.body.appendChild(webview)
      })
  
      describe('targetOrigin argument', function () {
        let serverURL
        let server
  
        beforeEach(function (done) {
          server = http.createServer(function (req, res) {
            res.writeHead(200)
            const filePath = path.join(fixtures, 'pages', 'window-opener-targetOrigin.html')
            res.end(fs.readFileSync(filePath, 'utf8'))
          })
          server.listen(0, '127.0.0.1', function () {
            serverURL = `http://127.0.0.1:${server.address().port}`
            done()
          })
        })
  
        afterEach(function () {
          server.close()
        })
  
        it('delivers messages that match the origin', function (done) {
          let b
          listener = function (event) {
            window.removeEventListener('message', listener)
            b.close()
            assert.equal(event.data, 'deliver')
            done()
          }
          window.addEventListener('message', listener)
          b = window.open(serverURL, '', 'show=no')
        })
      })
    })
  
    describe('creating a Uint8Array under browser side', function () {
      it('does not crash', function () {
        var RUint8Array = remote.getGlobal('Uint8Array')
        var arr = new RUint8Array()
        assert(arr)
      })
    })
  
    describe('webgl', function () {
      if (isCI && process.platform === 'win32') {
        return
      }
  
      it('can be get as context in canvas', function () {
        if (process.platform === 'linux') return
  
        var webgl = document.createElement('canvas').getContext('webgl')
        assert.notEqual(webgl, null)
      })
    })
  
    describe('web workers', function () {
      it('Worker can work', function (done) {
        var worker = new Worker('../fixtures/workers/worker.js')
        var message = 'ping'
        worker.onmessage = function (event) {
          assert.equal(event.data, message)
          worker.terminate()
          done()
        }
        worker.postMessage(message)
      })
  
      it('Worker has no node integration by default', function (done) {
        let worker = new Worker('../fixtures/workers/worker_node.js')
        worker.onmessage = function (event) {
          assert.equal(event.data, 'undefined undefined undefined undefined')
          worker.terminate()
          done()
        }
      })
  
      it('Worker has node integration with nodeIntegrationInWorker', function (done) {
        let webview = new WebView()
        webview.addEventListener('ipc-message', function (e) {
          assert.equal(e.channel, 'object function object function')
          webview.remove()
          done()
        })
        webview.src = 'file://' + fixtures + '/pages/worker.html'
        webview.setAttribute('webpreferences', 'nodeIntegration, nodeIntegrationInWorker')
        document.body.appendChild(webview)
      })
  
      it('SharedWorker can work', function (done) {
        var worker = new SharedWorker('../fixtures/workers/shared_worker.js')
        var message = 'ping'
        worker.port.onmessage = function (event) {
          assert.equal(event.data, message)
          done()
        }
        worker.port.postMessage(message)
      })
  
      it('SharedWorker has no node integration by default', function (done) {
        let worker = new SharedWorker('../fixtures/workers/shared_worker_node.js')
        worker.port.onmessage = function (event) {
          assert.equal(event.data, 'undefined undefined undefined undefined')
          done()
        }
      })
  
      it('SharedWorker has node integration with nodeIntegrationInWorker', function (done) {
        let webview = new WebView()
        webview.addEventListener('console-message', function (e) {
          console.log(e)
        })
        webview.addEventListener('ipc-message', function (e) {
          assert.equal(e.channel, 'object function object function')
          webview.remove()
          done()
        })
        webview.src = 'file://' + fixtures + '/pages/shared_worker.html'
        webview.setAttribute('webpreferences', 'nodeIntegration, nodeIntegrationInWorker')
        document.body.appendChild(webview)
      })
    })
  
    describe('iframe', function () {
      var iframe = null
  
      beforeEach(function () {
        iframe = document.createElement('iframe')
      })
  
      afterEach(function () {
        document.body.removeChild(iframe)
      })
  
      it('does not have node integration', function (done) {
        iframe.src = 'file://' + fixtures + '/pages/set-global.html'
        document.body.appendChild(iframe)
        iframe.onload = function () {
          assert.equal(iframe.contentWindow.test, 'undefined undefined undefined')
          done()
        }
      })
    })
  
    describe('storage', function () {
      it('requesting persitent quota works', function (done) {
        navigator.webkitPersistentStorage.requestQuota(1024 * 1024, function (grantedBytes) {
          assert.equal(grantedBytes, 1048576)
          done()
        })
      })
  
      describe('custom non standard schemes', function () {
        const protocolName = 'storage'
        let contents = null
        before(function (done) {
          const handler = function (request, callback) {
            let parsedUrl = url.parse(request.url)
            let filename
            switch (parsedUrl.pathname) {
              case '/localStorage' : filename = 'local_storage.html'; break
              case '/sessionStorage' : filename = 'session_storage.html'; break
              case '/WebSQL' : filename = 'web_sql.html'; break
              case '/indexedDB' : filename = 'indexed_db.html'; break
              case '/cookie' : filename = 'cookie.html'; break
              default : filename = ''
            }
            callback({path: fixtures + '/pages/storage/' + filename})
          }
          protocol.registerFileProtocol(protocolName, handler, function (error) {
            done(error)
          })
        })
  
        after(function (done) {
          protocol.unregisterProtocol(protocolName, () => done())
        })
  
        beforeEach(function () {
          contents = webContents.create({})
        })
  
        afterEach(function () {
          contents.destroy()
          contents = null
        })
  
        it('cannot access localStorage', function (done) {
          ipcMain.once('local-storage-response', function (event, error) {
            assert.equal(
              error,
              'Failed to read the \'localStorage\' property from \'Window\': Access is denied for this document.')
            done()
          })
          contents.loadURL(protocolName + '://host/localStorage')
        })
  
        it('cannot access sessionStorage', function (done) {
          ipcMain.once('session-storage-response', function (event, error) {
            assert.equal(
              error,
              'Failed to read the \'sessionStorage\' property from \'Window\': Access is denied for this document.')
            done()
          })
          contents.loadURL(protocolName + '://host/sessionStorage')
        })
  
        it('cannot access WebSQL database', function (done) {
          ipcMain.once('web-sql-response', function (event, error) {
            assert.equal(
              error,
              'An attempt was made to break through the security policy of the user agent.')
            done()
          })
          contents.loadURL(protocolName + '://host/WebSQL')
        })
  
        it('cannot access indexedDB', function (done) {
          ipcMain.once('indexed-db-response', function (event, error) {
            assert.equal(error, 'The user denied permission to access the database.')
            done()
          })
          contents.loadURL(protocolName + '://host/indexedDB')
        })
  
        it('cannot access cookie', function (done) {
          ipcMain.once('cookie-response', function (event, cookie) {
            assert(!cookie)
            done()
          })
          contents.loadURL(protocolName + '://host/cookie')
        })
      })
    })
  
    describe('websockets', function () {
      var wss = null
      var server = null
      var WebSocketServer = ws.Server
  
      afterEach(function () {
        wss.close()
        server.close()
      })
  
      it('has user agent', function (done) {
        server = http.createServer()
        server.listen(0, '127.0.0.1', function () {
          var port = server.address().port
          wss = new WebSocketServer({
            server: server
          })
          wss.on('error', done)
          wss.on('connection', function (ws) {
            if (ws.upgradeReq.headers['user-agent']) {
              done()
            } else {
              done('user agent is empty')
            }
          })
          var socket = new WebSocket(`ws://127.0.0.1:${port}`)
          assert(socket)
        })
      })
    })
  
    describe('Promise', function () {
      it('resolves correctly in Node.js calls', function (done) {
        document.registerElement('x-element', {
          prototype: Object.create(HTMLElement.prototype, {
            createdCallback: {
              value: function () {}
            }
          })
        })
        setImmediate(function () {
          var called = false
          Promise.resolve().then(function () {
            done(called ? void 0 : new Error('wrong sequence'))
          })
          document.createElement('x-element')
          called = true
        })
      })
  
      it('resolves correctly in Electron calls', function (done) {
        document.registerElement('y-element', {
          prototype: Object.create(HTMLElement.prototype, {
            createdCallback: {
              value: function () {}
            }
          })
        })
        remote.getGlobal('setImmediate')(function () {
          var called = false
          Promise.resolve().then(function () {
            done(called ? void 0 : new Error('wrong sequence'))
          })
          document.createElement('y-element')
          called = true
        })
      })
    })
  
    describe('fetch', function () {
      it('does not crash', function (done) {
        const server = http.createServer(function (req, res) {
          res.end('test')
          server.close()
        })
        server.listen(0, '127.0.0.1', function () {
          const port = server.address().port
          fetch(`http://127.0.0.1:${port}`).then((res) => {
            return res.body.getReader()
          }).then((reader) => {
            reader.read().then((r) => {
              reader.cancel()
              done()
            })
          }).catch(function (e) {
            done(e)
          })
        })
      })
    })
  
    describe('PDF Viewer', function () {
      const pdfSource = url.format({
        pathname: path.join(fixtures, 'assets', 'cat.pdf').replace(/\\/g, '/'),
        protocol: 'file',
        slashes: true
      })
  
      function createBrowserWindow ({plugins}) {
        w = new BrowserWindow({
          show: false,
          webPreferences: {
            preload: path.join(fixtures, 'module', 'preload-pdf-loaded.js'),
            plugins: plugins
          }
        })
      }
  
      it('opens when loading a pdf resource as top level navigation', function (done) {
        createBrowserWindow({plugins: true})
        ipcMain.once('pdf-loaded', function (event, state) {
          assert.equal(state, 'success')
          done()
        })
        w.webContents.on('page-title-updated', function () {
          const parsedURL = url.parse(w.webContents.getURL(), true)
          assert.equal(parsedURL.protocol, 'chrome:')
          assert.equal(parsedURL.hostname, 'pdf-viewer')
          assert.equal(parsedURL.query.src, pdfSource)
          assert.equal(w.webContents.getTitle(), 'cat.pdf')
        })
        w.webContents.loadURL(pdfSource)
      })
  
      it('should download a pdf when plugins are disabled', function (done) {
        createBrowserWindow({plugins: false})
        ipcRenderer.sendSync('set-download-option', false, false)
        ipcRenderer.once('download-done', function (event, state, url, mimeType, receivedBytes, totalBytes, disposition, filename) {
          assert.equal(state, 'completed')
          assert.equal(filename, 'cat.pdf')
          assert.equal(mimeType, 'application/pdf')
          fs.unlinkSync(path.join(fixtures, 'mock.pdf'))
          done()
        })
        w.webContents.loadURL(pdfSource)
      })
  
      it('should not open when pdf is requested as sub resource', function (done) {
        createBrowserWindow({plugins: true})
        webFrame.registerURLSchemeAsPrivileged('file', {
          secure: false,
          bypassCSP: false,
          allowServiceWorkers: false,
          corsEnabled: false
        })
        fetch(pdfSource).then(function (res) {
          assert.equal(res.status, 200)
          assert.notEqual(document.title, 'cat.pdf')
          done()
        }).catch(function (e) {
          done(e)
        })
      })
    })
  
    describe('window.alert(message, title)', function () {
      it('throws an exception when the arguments cannot be converted to strings', function () {
        assert.throws(function () {
          window.alert({toString: null})
        }, /Cannot convert object to primitive value/)
  
        assert.throws(function () {
          window.alert('message', {toString: 3})
        }, /Cannot convert object to primitive value/)
      })
    })
  
    describe('window.confirm(message, title)', function () {
      it('throws an exception when the arguments cannot be converted to strings', function () {
        assert.throws(function () {
          window.confirm({toString: null}, 'title')
        }, /Cannot convert object to primitive value/)
  
        assert.throws(function () {
          window.confirm('message', {toString: 3})
        }, /Cannot convert object to primitive value/)
      })
    })
  
    describe('window.history', function () {
      describe('window.history.go(offset)', function () {
        it('throws an exception when the argumnet cannot be converted to a string', function () {
          assert.throws(function () {
            window.history.go({toString: null})
          }, /Cannot convert object to primitive value/)
        })
      })
  
      describe('window.history.pushState', function () {
        it('should push state after calling history.pushState() from the same url', (done) => {
          w = new BrowserWindow({
            show: false
          })
          w.webContents.once('did-finish-load', () => {
            // History should have current page by now.
            assert.equal(w.webContents.length(), 1)
  
            w.webContents.executeJavaScript('window.history.pushState({}, "")', () => {
              // Initial page + pushed state
              assert.equal(w.webContents.length(), 2)
              done()
            })
          })
          w.loadURL('about:blank')
        })
      })
    })
  })
  