Added a test that currently is able to print to pdf.

chrome/browser/resources/print_preview/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.
 
 // TODO(rltoscano): Move data/* into print_preview.data namespace
 
 var localStrings = new LocalStrings(templateData);
 
 <include src="component.js"/>
 
@@ skipping 267 matching lines @@
           print_preview.NativeLayer.EventType.SETTINGS_INVALID,
           this.onSettingsInvalid_.bind(this));
       this.tracker.add(
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.DISABLE_SCALING,
           this.onDisableScaling_.bind(this));
       this.tracker.add(
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.PRIVET_PRINT_FAILED,
           this.onPrivetPrintFailed_.bind(this));
-
+      this.tracker.add(
+          this.nativeLayer_,
+          print_preview.NativeLayer.EventType.MANIPULATE_SETTINGS_FOR_TEST,
+          this.onManipulateSettingsForTest_.bind(this));
 
       this.tracker.add(
           $('system-dialog-link'),
           'click',
           this.openSystemPrintDialog_.bind(this));
       this.tracker.add(
           $('cloud-print-dialog-link'),
           'click',
           this.onCloudPrintDialogLinkClick_.bind(this));
       this.tracker.add(
@@ skipping 385 matching lines @@
       this.isPreviewGenerationInProgress_ = true;
     },
 
     /**
      * Called when the preview area's preview generation is complete.
      * @private
      */
     onPreviewGenerationDone_: function() {
       this.isPreviewGenerationInProgress_ = false;
       this.printHeader_.isPrintButtonEnabled = true;
+      this.nativeLayer_.previewReadyForTest();
       this.printIfReady_();
     },
 
     /**
      * Called when the preview area's preview failed to load.
      * @private
      */
     onPreviewGenerationFail_: function() {
       this.isPreviewGenerationInProgress_ = false;
       this.printHeader_.isPrintButtonEnabled = false;
@@ skipping 179 matching lines @@
      * @private
      */
     onPrivetPrintFailed_: function(event) {
       console.error('Privet printing failed with error code ' +
                     event.httpError);
       this.printHeader_.setErrorMessage(
         localStrings.getString('couldNotPrint'));
     },
 
     /**
+     * Called when the print preview settings need to be changed for testing.
+     * @param {Event} event Event object that contains the option that is to
+     *     be changed and what to set that option.
+     * @private
+     */
+    onManipulateSettingsForTest_: function(event) {
+      if ('selectSaveAsPdfDestination' in event.settings) {
+        var destinations = this.destinationStore_.destinations();
+        var pdfDestination = null;
+        for (var i = 0; i < destinations.length; i++) {
+          if (destinations[i].id ==
+              print_preview.Destination.GooglePromotedId.SAVE_AS_PDF) {
+            pdfDestination = destinations[i];
+            break;
+          }
+        }
+        if (pdfDestination)
+          this.destinationStore_.selectDestination(pdfDestination);
+        else
+          this.nativeLayer_.previewFailedForTest();
+      } else if ('layoutSettings' in event.settings) {
+        var element = document.querySelector(
+            event.settings.layoutSettings.portrait ?
+                '.layout-settings-portrait-radio' :
+                '.layout-settings-landscape-radio');
+        if (element.clicked)
+          this.nativeLayer_.previewReadyForTest();
+        else
+          element.click();
+      } else if ('pageRange' in event.settings) {
+        var textbox = document.querySelector('.page-settings-custom-input');
+        if (textbox.value == event.settings.pageRange) {
+          this.nativeLayer_.previewReadyForTest();
+        } else {
+          textbox.value = event.settings.pageRange;
+          document.querySelector('.page-settings-custom-radio').click();
+        }
+      } else if ('headersAndFooters' in event.settings) {
+        var checkbox = document.querySelector('.header-footer-checkbox');
+        if (event.settings.headersAndFooters == checkbox.checked)
+          this.nativeLayer_.previewReadyForTest();
+        else
+          checkbox.click();
+      } else if ('backgroundColorsAndImages' in event.settings) {
+        var checkbox = document.querySelector('.css-background-checkbox');
+        if (event.settings.backgroundColorsAndImages == checkbox.checked)
+          this.nativeLayer_.previewReadyForTest();
+        else
+          checkbox.click();
+      } else if ('margins' in event.settings) {
+        var combobox = document.querySelector('.margin-settings-select');
+        if (event.settings.margins == combobox.selectedIndex) {
+          this.nativeLayer_.previewReadyForTest();
+        } else if (event.settings.margins >= 0 &&
+                   event.settings.margins < combobox.length) {
+          combobox.selectedIndex = event.settings.margins;
+          this.marginSettings_.onSelectChange_();
+        } else {
+          this.nativeLayer_.previewFailedForTest();
+        }
+      }
+    },

[Dan Beam, 2014/06/24 23:13:01]

"much code, no newlines, ow" - my eyes

[ivandavid, 2014/06/25 00:02:22]

Ha. I am not sure where to put new lines though. I tried putting them in, but it
made the code look awkward. This whole file looks like this and Aleksey said the
one nice place where some newlines would be good are before the 'else if'
statements. Any suggestions for where I should put some newlines?

[ivandavid, 2014/06/25 00:04:08]

And those new lines don't conform to the style guide.

+
+    /**
      * Called when the open-cloud-print-dialog link is clicked. Opens the Google
      * Cloud Print web dialog.
      * @private
      */
     onCloudPrintDialogLinkClick_: function() {
       assert(this.uiState_ == PrintPreview.UiState_.READY,
              'Opening Google Cloud Print dialog when not in ready state: ' +
                  this.uiState_);
       setIsVisible($('cloud-print-dialog-throbber'), true);
       this.setIsEnabled_(false);
@@ skipping 131 matching lines @@
 <include src="search/recent_destination_list.js"/>
 <include src="search/destination_list_item.js"/>
 <include src="search/destination_search.js"/>
 <include src="search/search_box.js"/>
 <include src="search/fedex_tos.js"/>
 
 window.addEventListener('DOMContentLoaded', function() {
   printPreview = new print_preview.PrintPreview();
   printPreview.initialize();
 });