Files.app: Reland r261616: Add a test to rename a file.

chrome/browser/resources/file_manager/background/js/test_util.js

Index: chrome/browser/resources/file_manager/background/js/test_util.js
diff --git a/chrome/browser/resources/file_manager/background/js/test_util.js b/chrome/browser/resources/file_manager/background/js/test_util.js
index d173e3f5bb38a72aa5850c66e608576b381a2719..0b13b04d532cf0f031118164b1e5a5da4b5abed3 100644
--- a/chrome/browser/resources/file_manager/background/js/test_util.js
+++ b/chrome/browser/resources/file_manager/background/js/test_util.js
@@ -229,13 +229,13 @@ test.util.sync.inputText = function(contentWindow, query, text) {
  * @return {boolean} True if file got selected, false otherwise.
  */
 test.util.sync.selectFile = function(contentWindow, filename) {
-  var table = contentWindow.document.querySelector('#detail-table');
-  var rows = table.querySelectorAll('li');
+  var rows = contentWindow.document.querySelectorAll('#detail-table li');
+  test.util.sync.fakeKeyDown(contentWindow, '#file-list', 'Home', false);
   for (var index = 0; index < rows.length; ++index) {
-    test.util.sync.fakeKeyDown(contentWindow, '#file-list', 'Down', false);
     var selection = test.util.sync.getSelectedFiles(contentWindow);
     if (selection.length === 1 && selection[0] === filename)
       return true;
+    test.util.sync.fakeKeyDown(contentWindow, '#file-list', 'Down', false);
   }
   console.error('Failed to select file "' + filename + '"');
   return false;