MD Downloads: add a JS unit test for search term splitting

chrome/browser/resources/md_downloads/action_service_unittest.gtestjs

Index: chrome/browser/resources/md_downloads/action_service_unittest.gtestjs
diff --git a/chrome/browser/resources/md_downloads/action_service_unittest.gtestjs b/chrome/browser/resources/md_downloads/action_service_unittest.gtestjs
new file mode 100644
index 0000000000000000000000000000000000000000..9f850352f75ac9b204fad8f69be043897aefc448
--- /dev/null
+++ b/chrome/browser/resources/md_downloads/action_service_unittest.gtestjs
@@ -0,0 +1,39 @@
+// Copyright 2015 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.
+
+/**
+ * @param {!Array<string>} list
+ * @return {string}
+ */
+function str(list) {
+  return JSON.stringify(list);
+}
+
+/**
+ * @extends {testing.Test}
+ * @constructor
+ */
+function ActionServiceUnitTest() {}
+
+ActionServiceUnitTest.prototype = {
+  __proto__: testing.Test.prototype,
+
+  /** @override */
+  extraLibraries: [
+    '../../../../ui/webui/resources/js/cr.js',
+    'action_service.js',
+  ],
+};
+
+TEST_F('ActionServiceUnitTest', 'splitTerms', function() {
+  var ActionService = downloads.ActionService;
+  assertEquals(str([]), str(ActionService.splitTerms('')));
+  assertEquals(str([]), str(ActionService.splitTerms('  ')));
+  assertEquals(str(['a']), str(ActionService.splitTerms('a')));
+  assertEquals(str(['a b']), str(ActionService.splitTerms('a b')));
+  assertEquals(str(['a', 'b']), str(ActionService.splitTerms('a "b"')));
+  assertEquals(str(['a', 'b', 'c']), str(ActionService.splitTerms('a "b" c')));
+  assertEquals(str(['a', 'b b', 'c']),
+               str(ActionService.splitTerms('a "b b" c')));
+});