Print Preview: Update test to check parameters sent to print()

chrome/test/data/webui/print_preview/print_preview_tests.js

 // Copyright 2016 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.
 
 cr.define('print_preview_test', function() {
   /**
    * Index of the "Save as PDF" printer.
    * @type {number}
    * @const
    */
@@ skipping 1291 matching lines @@
               // Dispatch event indicating new preview has loaded.
               var previewDoneEvent = new Event(
                   print_preview.PreviewArea.EventType.PREVIEW_GENERATION_DONE);
               previewArea.dispatchEvent(previewDoneEvent);
 
               // Has active print button and successfully 'prints', indicating
               // recovery from error state.
               expectFalse(printButton.disabled);
               printButton.click();
               // This should result in a call to print.
-              return nativeLayer.whenCalled('print');
+              return nativeLayer.whenCalled('print').then(
+                  /**
+                   * @param {destination: !print_preview.Destination,
+                   *         printTicketStore: !print_preview.PrintTicketStore,
+                   *         cloudPrintInterface: print_preview
+                   *                                  .CloudPrintInterface,
+                   *         documentInfo: print_preview.DocumentInfo} args
+                   *      The arguments that print() was called with.
+                   */
+                  function(args) {
+                    // Sanity check some printing argument values.
+                    var printTicketStore = args.printTicketStore;
+                    expectEquals(args.destination.id, 'BarDevice');
+                    expectEquals(printTicketStore.landscape.getValue(), false);
+                    expectEquals(printTicketStore.copies.getValueAsNumber(), 1);
+                    expectEquals(
+                        printTicketStore.mediaSize.getValue().width_microns,
+                        215900);

[dpapad, 2017/06/27 18:49:00]

Can we store the result of getCddTemplate() at line 1297 and refer to it here,
instead of repeating number literal values?

[rbpotter, 2017/06/28 01:14:57]

Done.

+                    expectEquals(
+                        printTicketStore.mediaSize.getValue().height_microns,
+                        279400);
+                  });
             });
       });
     });
 
     // Test the preview generator to make sure the generate draft parameter is
     // set correctly. It should be false if the only change is the page range.
     test('GenerateDraft', function() {
       // Use a real preview generator.
       previewArea.previewGenerator_ =
           new print_preview.PreviewGenerator(printPreview.destinationStore_,
@@ skipping 45 matching lines @@
       return setupSettingsAndDestinationsWithCapabilities().then(function() {
         // The system default destination should be used instead of the
         // most recent destination.
         assertEquals(
             'FooDevice',
             printPreview.destinationStore_.selectedDestination.id);
       });
     });
   });
 });