MD History: Implement search functionality.

chrome/test/data/webui/md_history/history_toolbar_test.js

Index: chrome/test/data/webui/md_history/history_toolbar_test.js
diff --git a/chrome/test/data/webui/md_history/history_toolbar_test.js b/chrome/test/data/webui/md_history/history_toolbar_test.js
index 44c1b53a8a430fefbf42c7a5c532997cac15558e..4600fa29686dbbfe51051d2150f9cf95680beea5 100644
--- a/chrome/test/data/webui/md_history/history_toolbar_test.js
+++ b/chrome/test/data/webui/md_history/history_toolbar_test.js
@@ -7,6 +7,7 @@ cr.define('md_history.history_toolbar_test', function() {
   var TEST_HISTORY_RESULTS = [
     {
       "dateRelativeDay": "Today - Wednesday, December 9, 2015",
+      "title": "Google",
       "url": "https://www.google.com"
     }
   ];
@@ -22,7 +23,7 @@ cr.define('md_history.history_toolbar_test', function() {
       });
 
       test('selecting checkbox causes toolbar to change', function() {
-        element.addNewResults(TEST_HISTORY_RESULTS);
+        element.addNewResults(TEST_HISTORY_RESULTS, '');
 
         flush(function() {
           var item = element.$$('history-card').$$('history-item');
@@ -45,7 +46,52 @@ cr.define('md_history.history_toolbar_test', function() {
         });
       });
 
+      test('search term gathered correctly from toolbar', function(done) {

[tsergeant, 2016/02/02 02:57:36]

So many tests \o/

+        registerMessageCallback('queryHistory', this, function (info) {
+          assertEquals(info[0], 'Test');
+          done();
+        });
+
+        toolbar.onSearchTermSearch('Test');
+      });
+
+      test('search results display with correct title', function(done) {
+        element.addNewResults(TEST_HISTORY_RESULTS, 'Google');
+
+        flush(function() {
+          var heading = element.$$('history-card').$$('#date-accessed');
+          var title = element.$$('history-card').$$('history-item').$['title'];
+
+          assertEquals(heading.textContent,

[tsergeant, 2016/02/02 02:57:36]

This feels kinda brittle -- you're testing the precise location of newline
characters. As a simple fix, can you use substr instead to check if the string
is in there?

[hsampson, 2016/02/03 02:37:59]

Done. Yup that's way better.

+              '\n          Found 1 search result for \'Google\'.\n        ');
+          assertEquals(title.innerHTML, '<b>Google</b>');
+          done();
+        });
+      });
+
+      test('correct display message when no history available', function(done) {
+        element.addNewResults([], '');
+
+        flush(function() {
+          assertEquals(element.$$('#no-results').textContent,
+                       'No history entries found.');
+          done();
+        })
+      });
+
+      test('correct display message when no search results returned',
+          function(done) {
+        element.addNewResults([], 'Test');
+
+        flush(function() {
+          assertEquals(element.$$('#no-results').textContent,
+                       'No search results found.');
+          done();
+        })
+      });
+
       teardown(function() {
+        element.historyDataByDay_ = [];
         toolbar.count = 0;
       });
     });