MD History: Implement search functionality.

chrome/test/data/webui/md_history/history_toolbar_test.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('md_history.history_toolbar_test', function() {
   // Array of test history data.
   var TEST_HISTORY_RESULTS = [
     {
       "dateRelativeDay": "Today - Wednesday, December 9, 2015",
+      "title": "Google",
       "url": "https://www.google.com"
     }
   ];
 
   function registerTests() {
     suite('history-toolbar', function() {
       var element;
       var toolbar;
 
       suiteSetup(function() {
         element = $('history-card-manager');
         toolbar = $('toolbar');
       });
 
       test('selecting checkbox causes toolbar to change', function(done) {
-        element.addNewResults(TEST_HISTORY_RESULTS);
+        element.addNewResults(TEST_HISTORY_RESULTS, '');
 
         flush(function() {
           var item = element.$$('history-card').$$('history-item');
           MockInteractions.tap(item.$.checkbox);
 
           // Ensure that when an item is selected that the count held by the
           // toolbar increases.
           assertEquals(1, toolbar.count);
           // Ensure that the toolbar boolean states that at least one item is
           // selected.
           assertTrue(toolbar.itemsSelected_);
 
           MockInteractions.tap(item.$.checkbox);
 
           // Ensure that when an item is deselected the count held by the
           // toolbar decreases.
           assertEquals(0, toolbar.count);
           // Ensure that the toolbar boolean states that no items are selected.
           assertFalse(toolbar.itemsSelected_);
 
           done();
         });
       });
 
+      test('search term gathered correctly from toolbar', function(done) {
+        registerMessageCallback('queryHistory', this, function (info) {
+          assertEquals(info[0], 'Test');
+          done();
+        });
+
+        toolbar.onSearchTermSearch('Test');
+      });
+
+      test('search results display with correct title', function(done) {

[tsergeant, 2016/02/08 22:59:01]

Chris and I had a chat about these tests the other day, and agree that
unfortunately they probably can't stay. The tests are entirely
language-dependent, and annoyingly brittle if we ever change the strings.

Ultimately, the tests are mostly checking that databinding has been done
correctly in the .html files, which means they're not extremely critical tests,
but they are nice to have. 

So, try and think of something to replace them which has more or less the same
effect without being entirely dependent on a loadTimeData string.

For example, you can test that "<b>Google</b>" is the result item, since it
doesn't depend on an external string.

You can also check that #no-results is visible (probably), but can't actually
check the contents.

[hsampson, 2016/02/09 02:17:51]

Done.

+        element.addNewResults(TEST_HISTORY_RESULTS, 'Google');
+
+        flush(function() {
+          var heading =
+              element.$$('history-card').$$('#date-accessed').textContent;
+          var title = element.$$('history-card').$$('history-item').$.title;
+
+          var index = heading.indexOf('Found 1 search result for \'Google\'.');
+
+          assertTrue(index != -1);
+          assertEquals(title.innerHTML, '<b>Google</b>');
+          done();
+        });
+      });
+
+      test('correct display message when no history available', function(done) {
+        element.addNewResults([], '');
+
+        flush(function() {
+          var message = element.$$('#no-results').textContent;
+          var index = message.indexOf('No history entries found.');
+
+          assertTrue(index != -1);
+          done();
+        })
+      });
+
+      test('correct display message when no search results returned',
+          function(done) {
+        element.addNewResults([], 'Test');
+
+        flush(function() {
+          var message = element.$$('#no-results').textContent;
+          var index = message.indexOf('No search results found.');
+
+          assertTrue(index != -1);
+          done();
+        })
+      });
+
       teardown(function() {
+        element.historyDataByDay_ = [];
         toolbar.count = 0;
       });
     });
   }
   return {
     registerTests: registerTests
   };
 });