add spec

spec/api-browser-window-spec.js

@@ -86,6 +86,38 @@ describe('BrowserWindow module', function () {
   })
 
   describe('BrowserWindow.close()', function () {
+    let server
+
+    before(function (done) {
+      server = http.createServer((request, response) => {
+        switch (request.url) {
+          case '/404':
+            response.statusCode = '404'
+            response.end()
+            break
+          case '/301':
+            response.statusCode = '301'
+            response.setHeader('Location', '/200')
+            response.end()
+            break
+          case '/200':
+            response.statusCode = '200'
+            response.end('hello')
+            break
+          default:
+            done('unsupported endpoint')
+        }
+      }).listen(0, '127.0.0.1', () => {
+        server.url = 'http://127.0.0.1:' + server.address().port
+        done()
+      })
+    })
+
+    after(function () {
+      server.close()
+      server = null
+    })
+
     it('should emit unload handler', function (done) {
       w.webContents.on('did-finish-load', function () {
         w.close()
@@ -109,6 +141,37 @@ describe('BrowserWindow module', function () {
       })
       w.loadURL('file://' + path.join(fixtures, 'api', 'beforeunload-false.html'))
     })
+
+    it('should not crash when invoked synchronously inside navigation observer', function (done) {
+      const events = [
+        { name: 'did-start-loading', url: `${server.url}/200` },
+        { name: 'did-get-redirect-request', url: `${server.url}/301` },
+        { name: 'did-get-response-details', url: `${server.url}/200` },
+        { name: 'dom-ready', url: `${server.url}/200` },
+        { name: 'did-stop-loading', url: `${server.url}/200` },
+        { name: 'did-finish-load', url: `${server.url}/200` },
+        { name: 'did-frame-finish-load', url: `${server.url}/200` },
+        { name: 'did-fail-load', url: `${server.url}/404` }
+      ]
+      const responseEvent = 'window-webContents-destroyed'
+
+      function* genNavigationEvent () {
+        let eventOptions = null
+        while ((eventOptions = events.shift()) && events.length) {
+          let w = new BrowserWindow({show: false})
+          eventOptions.id = w.id
+          eventOptions.responseEvent = responseEvent
+          ipcRenderer.send('test-webcontents-navigation-observer', eventOptions)
+          yield 1
+        }
+      }
+
+      let gen = genNavigationEvent()
+      ipcRenderer.on(responseEvent, function () {
+        if (!gen.next().value) done()
+      })
+      gen.next()
+    })
   })
 
   describe('window.close()', function () {

spec/api-web-contents-spec.js

@@ -542,4 +542,70 @@ describe('webContents module', function () {
       })
     })
   })
+
+  describe('destroy()', () => {
+    let server
+
+    before(function (done) {
+      server = http.createServer((request, response) => {
+        switch (request.url) {
+          case '/404':
+            response.statusCode = '404'
+            response.end()
+            break
+          case '/301':
+            response.statusCode = '301'
+            response.setHeader('Location', '/200')
+            response.end()
+            break
+          case '/200':
+            response.statusCode = '200'
+            response.end('hello')
+            break
+          default:
+            done('unsupported endpoint')
+        }
+      }).listen(0, '127.0.0.1', () => {
+        server.url = 'http://127.0.0.1:' + server.address().port
+        done()
+      })
+    })
+
+    after(function () {
+      server.close()
+      server = null
+    })
+
+    it('should not crash when invoked synchronously inside navigation observer', (done) => {
+      const events = [
+        { name: 'did-start-loading', url: `${server.url}/200` },
+        { name: 'did-get-redirect-request', url: `${server.url}/301` },
+        { name: 'did-get-response-details', url: `${server.url}/200` },
+        { name: 'dom-ready', url: `${server.url}/200` },
+        { name: 'did-stop-loading', url: `${server.url}/200` },
+        { name: 'did-finish-load', url: `${server.url}/200` },
+        // FIXME: Multiple Emit calls inside an observer assume that object
+        // will be alive till end of the observer. Synchronous `destroy` api
+        // violates this contract and crashes.
+        // { name: 'did-frame-finish-load', url: `${server.url}/200` },
+        { name: 'did-fail-load', url: `${server.url}/404` }
+      ]
+      const responseEvent = 'webcontents-destroyed'
+
+      function* genNavigationEvent () {
+        let eventOptions = null
+        while ((eventOptions = events.shift()) && events.length) {
+          eventOptions.responseEvent = responseEvent
+          ipcRenderer.send('test-webcontents-navigation-observer', eventOptions)
+          yield 1
+        }
+      }
+
+      let gen = genNavigationEvent()
+      ipcRenderer.on(responseEvent, () => {
+        if (!gen.next().value) done()
+      })
+      gen.next()
+    })
+  })
 })

spec/static/main.js

@@ -338,6 +338,27 @@ ipcMain.on('crash-service-pid', (event, pid) => {
   event.returnValue = null
 })
 
+ipcMain.on('test-webcontents-navigation-observer', (event, options) => {
+  let contents = null
+  let destroy = () => {}
+  if (options.id) {
+    const w = BrowserWindow.fromId(options.id)
+    contents = w.webContents
+    destroy = () => w.close()
+  } else {
+    contents = webContents.create()
+    destroy = () => contents.destroy()
+  }
+
+  contents.once(options.name, () => destroy())
+
+  contents.once('destroyed', () => {
+    event.sender.send(options.responseEvent)
+  })
+
+  contents.loadURL(options.url)
+})
+
 // Suspend listeners until the next event and then restore them
 const suspendListeners = (emitter, eventName, callback) => {
   const listeners = emitter.listeners(eventName)