MD Settings: make <paper-drawer-panel> flip in RTL

chrome/test/data/webui/settings/rtl_tests.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('settings_rtl_tests', function() {
+  /** @implements {settings.DirectionDelegate} */
+  function TestDirectionDelegate(isRtl) {
+    /** @override */
+    this.isRtl = function() { return isRtl; };
+  }
+
+  function registerDrawerPanelTests() {
+    suite('settings drawer panel RTL tests', function() {
+      test('test i18n processing flips drawer panel', function() {
+        var ui = document.createElement('settings-ui');
+        document.body.appendChild(ui);
+        Polymer.dom.flush();

[michaelpg, 2016/02/17 21:14:04]

not sure why the flush is necessary, does the panel do something asynchronously?

[Dan Beam, 2016/02/18 00:16:15]

it readies ui's local DOM

[Dan Beam, 2016/02/18 00:16:45]

er, it theory it did: actually isn't necessary (and removed)

[michaelpg, 2016/02/18 00:23:18]

just to be pedantic, in theory it doesn't, either: ready() is called
synchronously as part of document.createElement, after the element's local DOM
is recursively ready, and the element's $ is initilaized by then.

+
+        assertFalse(ui.$.panel.rightDrawer);
+
+        ui.directionDelegate = new TestDirectionDelegate(true /* isRtl */);
+        assertTrue(ui.$.panel.rightDrawer);
+
+        ui.directionDelegate = new TestDirectionDelegate(false /* isRtl */);
+        assertFalse(ui.$.panel.rightDrawer);
+      });
+    });
+  }
+
+  return {
+    registerDrawerPanelTests: registerDrawerPanelTests,
+  };
+});