Adding Angular and dependent packages for testing

third_party/pkg/js/lib/src/wrapping/js/date_to_datetime_adapter.dart

Index: third_party/pkg/js/lib/src/wrapping/js/date_to_datetime_adapter.dart
diff --git a/third_party/pkg/js/lib/src/wrapping/js/date_to_datetime_adapter.dart b/third_party/pkg/js/lib/src/wrapping/js/date_to_datetime_adapter.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2211c45a2c7d81c59a7070b646ab5f6160b48ab1
--- /dev/null
+++ b/third_party/pkg/js/lib/src/wrapping/js/date_to_datetime_adapter.dart
@@ -0,0 +1,58 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of js.wrapping;
+
+/// Adapter to handle a js date as a dart [DateTime].
+class JsDateToDateTimeAdapter extends TypedProxy implements DateTime {
+
+  /// Like [JsDateToDateTimeAdapter.fromProxy] but with `null` handling for
+  /// [proxy].
+  static JsDateToDateTimeAdapter cast(Proxy proxy) =>
+      mapNotNull(proxy, (proxy) =>
+          new JsDateToDateTimeAdapter.fromProxy(proxy));
+
+  /// Create a new adapter from a dart [dateTime].
+  JsDateToDateTimeAdapter(DateTime dateTime) :
+      super(context.Date, [dateTime.millisecondsSinceEpoch]);
+
+  /// Create a new adapter from a [proxy] of a Js Date object.
+  JsDateToDateTimeAdapter.fromProxy(Proxy proxy) : super.fromProxy(proxy);
+
+  // from Comparable
+  @override int compareTo(DateTime other) => _asDateTime().compareTo(other);
+
+  // from Date
+  @override bool operator ==(DateTime other) => _asDateTime() == other;
+  @override bool isBefore(DateTime other) => _asDateTime().isBefore(other);
+  @override bool isAfter(DateTime other) => _asDateTime().isAfter(other);
+  @override bool isAtSameMomentAs(DateTime other) =>
+      _asDateTime().isAtSameMomentAs(other);
+  @override DateTime toLocal() => _asDateTime().toLocal();
+  @override DateTime toUtc() => _asDateTime().toUtc();
+  @override String get timeZoneName => _asDateTime().timeZoneName;
+  @override Duration get timeZoneOffset => _asDateTime().timeZoneOffset;
+  @override int get year => _asDateTime().year;
+  @override int get month => _asDateTime().month;
+  @override int get day => _asDateTime().day;
+  @override int get hour => _asDateTime().hour;
+  @override int get minute => _asDateTime().minute;
+  @override int get second => _asDateTime().second;
+  @override int get millisecond => _asDateTime().millisecond;
+  @override int get weekday => _asDateTime().weekday;
+  @override int get millisecondsSinceEpoch =>
+      _asDateTime().millisecondsSinceEpoch;
+  @override void set millisecondsSinceEpoch(v) => throw "final";
+  @override bool get isUtc => _asDateTime().isUtc;
+  @override void set isUtc(v) => throw "final";
+  @override String toString() => _asDateTime().toString();
+  @override DateTime add(Duration duration) => _asDateTime().add(duration);
+  @override DateTime subtract(Duration duration) =>
+      _asDateTime().subtract(duration);
+  @override Duration difference(DateTime other) =>
+      _asDateTime().difference(other);
+
+  DateTime _asDateTime() =>
+      new DateTime.fromMillisecondsSinceEpoch($unsafe.getTime());
+}