Adding Angular and dependent packages for testing

third_party/pkg/route_hierarchical/test/pattern_test.dart

+// 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.
+
+import 'package:unittest/unittest.dart';
+import 'package:route_hierarchical/pattern.dart';
+
+main() {
+  test('matchAny', () {
+    var p = matchAny(['a', 'b'], exclude: ['ac', 'aa']);
+    expect(p.allMatches('a').map(matchValue), ['a']);
+    expect(p.allMatches('ab').map(matchValue), ['a', 'b']);
+    expect(p.allMatches('aa').map(matchValue), []);
+    expect(p.allMatches('bb').map(matchValue), ['b', 'b']);
+    expect(p.allMatches('aca').map(matchValue), []);
+  });
+
+  test('matchesFull', () {
+    expect(matchesFull('a', 'aa'), false);
+    expect(matchesFull('aa', 'aa'), true);
+  });
+}
+
+String matchValue(Match m) => m.input.substring(m.start, m.end);