Add karma-runner and convert some tests to run with karma The following changes are included in this change: * karma-runner is added to the polygerrit-ui/package.json file * bazel rule for karma tests is added to the polygerrit-ui/BUILD file * The run_test.sh script is updated - it runs both deprecated web-component-tester(WCT) tests and karma tests * Commands to run separately karma and wct tests are added to the top level package.json file * The common-test-setup-karma.js file adds global functions to replace functionality provided by the WCT * The postinstall step is added to the polygerrit-ui/package.json file to run 'selenium-standalone install' command. Note, that this is not a new command - it runs during the WCT install (see wct-local/scripts/postinstall.js), but sometimes it fails after switching between different branches. Calling it in the postinstall step of polygerrit-ui/package.json improves the situation. Change-Id: Iaf480d22c5553d98eb7607a0e83a86b66f733caa

diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.js
similarity index 97%
rename from polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
rename to polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.js
index 9dab7af..9e6b53a 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.js

@@ -1,45 +1,21 @@
-<!DOCTYPE html>
-<!--
-@license
-Copyright (C) 2015 The Android Open Source Project
+/**
+ * @license
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
--->
-
-<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
-<meta charset="utf-8">
-<title>gr-change-view</title>
-
-<script src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>
-
-<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-lite.js"></script>
-<script src="/components/wct-browser-legacy/browser.js"></script>
-<script src="/node_modules/page/page.js"></script>
-
-<test-fixture id="basic">
-  <template>
-    <gr-change-view></gr-change-view>
-  </template>
-</test-fixture>
-
-<test-fixture id="blank">
-  <template>
-    <div></div>
-  </template>
-</test-fixture>
-
-<script type="module">
-import '../../../test/common-test-setup.js';
+import '../../../test/common-test-setup-karma.js';
 import '../../edit/gr-edit-constants.js';
 import './gr-change-view.js';
 import {PrimaryTab, SecondaryTab, ChangeStatus} from '../../../constants/constants.js';
@@ -53,7 +29,10 @@
 import {pluginLoader} from '../../shared/gr-js-api-interface/gr-plugin-loader.js';
 import {_testOnly_initGerritPluginApi} from '../../shared/gr-js-api-interface/gr-gerrit.js';
 
+import 'lodash/lodash.js';
+
 const pluginApi = _testOnly_initGerritPluginApi();
+const fixture = fixtureFromElement('gr-change-view');
 
 suite('gr-change-view tests', () => {
   const kb = KeyboardShortcutBinder;
@@ -314,7 +293,7 @@
       getDiffDrafts() { return Promise.resolve({}); },
       _fetchSharedCacheURL() { return Promise.resolve({}); },
     });
-    element = fixture('basic');
+    element = fixture.instantiate();
     sandbox.stub(element.$.actions, 'reload').returns(Promise.resolve());
     pluginLoader.loadPlugins([]);
     pluginApi.install(
@@ -2401,4 +2380,3 @@
     });
   });
 });
-</script>