Assert on tab id as well

spec/api-browser-window-spec.js

@@ -864,6 +864,7 @@ describe('browser-window module', function () {
 
           ipcMain.once('answer', function (event, message) {
             assert.equal(message.runtimeId, 'foo')
+            assert.equal(message.tabId, w.webContents.id)
             done()
           })
         })
@@ -875,6 +876,7 @@ describe('browser-window module', function () {
 
           ipcMain.once('answer', function (event, message, extensionId) {
             assert.equal(message.runtimeId, 'foo')
+            assert.equal(message.tabId, w.webContents.id)
             done()
           })
         })

spec/fixtures/devtools-extensions/foo/index.html

@@ -5,7 +5,8 @@
     <title></title>
     <script>
       var message = JSON.stringify({
-        runtimeId: chrome.runtime.id
+        runtimeId: chrome.runtime.id,
+        tabId: chrome.devtools.inspectedWindow.tabId
       })
       var sendMessage = `require('electron').ipcRenderer.send('answer', ${message})`
       window.chrome.devtools.inspectedWindow.eval(sendMessage, function () {})

spec/webview-spec.js

@@ -929,6 +929,7 @@ describe('<webview> tag', function () {
 
     ipcMain.once('answer', function (event, message) {
       assert.equal(message.runtimeId, 'foo')
+      assert.notEqual(message.tabId, w.webContents.id)
       done()
     })
   })