Begins preview generation as soon as initial state is loaded. Doesn't wait for print destination to…

chrome/test/data/webui/print_preview.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Test fixture for print preview WebUI testing.
  * @constructor
  * @extends {testing.Test}
  */
 function PrintPreviewWebUITest() {
@@ skipping 206 matching lines @@
       visible, section.classList.contains('visible'), 'section=' + section.id);
 }
 
 function checkElementDisplayed(el, isDisplayed) {
   assertNotEquals(null, el);
   expectEquals(isDisplayed, !el.hidden);
 }
 
 // Test that disabled settings hide the disabled sections.
 TEST_F('PrintPreviewWebUITest', 'TestSectionsDisabled', function() {
+  checkSectionVisible($('layout-settings'), true);
+  checkSectionVisible($('color-settings'), true);
+  checkSectionVisible($('copies-settings'), true);
+
   var initialSettingsSetEvent =
       new cr.Event(print_preview.NativeLayer.EventType.INITIAL_SETTINGS_SET);
   initialSettingsSetEvent.initialSettings = this.initialSettings_;
   this.nativeLayer_.dispatchEvent(initialSettingsSetEvent);
 
   var localDestsSetEvent =
       new cr.Event(print_preview.NativeLayer.EventType.LOCAL_DESTINATIONS_SET);
   localDestsSetEvent.destinationInfos = this.localDestinationInfos_;
   this.nativeLayer_.dispatchEvent(localDestsSetEvent);
 
-  checkSectionVisible($('layout-settings'), true);
-  checkSectionVisible($('color-settings'), true);
-  checkSectionVisible($('copies-settings'), true);
-
   var capsSetEvent =
       new cr.Event(print_preview.NativeLayer.EventType.CAPABILITIES_SET);
   capsSetEvent.settingsInfo = {
     'printerId': 'FooDevice',
     'disableColorOption': true,
     'setColorAsDefault': true,
     'disableCopiesOption': true,
     'disableLandscapeOption': true,
     'printerDefaultDuplexValue': 0
   };
@@ skipping 508 matching lines @@
   expectEquals(true, previewFailedMessageEl.hidden);
 
   var printFailedMessageEl =
       previewAreaEl.getElementsByClassName('preview-area-print-failed')[0];
   expectEquals(true, printFailedMessageEl.hidden);
 
   var customMessageEl =
       previewAreaEl.getElementsByClassName('preview-area-custom-message')[0];
   expectEquals(false, customMessageEl.hidden);
 });