Roll Observatory packages and add a roll script

packages/unittest/test/skipped_soloed_nested_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.
+
+library unittest.skipped_soloed_nested_test;
+
+import 'package:unittest/unittest.dart';
+
+import 'package:metatest/metatest.dart';
+
+void main() => initTests(_test);
+
+void _test(message) {
+  initMetatest(message);
+
+  expectTestResults('skipped/soloed nested groups with setup/teardown', () {
+    StringBuffer s = null;
+    setUp(() {
+      if (s == null) s = new StringBuffer();
+    });
+    test('top level', () {
+      s.write('A');
+    });
+    skip_test('skipped top level', () {
+      s.write('B');
+    });
+    skip_group('skipped top level group', () {
+      setUp(() {
+        s.write('C');
+      });
+      solo_test('skipped solo nested test', () {
+        s.write('D');
+      });
+    });
+    group('non-solo group', () {
+      setUp(() {
+        s.write('E');
+      });
+      test('in non-solo group', () {
+        s.write('F');
+      });
+      solo_test('solo_test in non-solo group', () {
+        s.write('G');
+      });
+    });
+    solo_group('solo group', () {
+      setUp(() {
+        s.write('H');
+      });
+      test('solo group non-solo test', () {
+        s.write('I');
+      });
+      solo_test('solo group solo test', () {
+        s.write('J');
+      });
+      group('nested non-solo group in solo group', () {
+        test('nested non-solo group non-solo test', () {
+          s.write('K');
+        });
+        solo_test('nested non-solo group solo test', () {
+          s.write('L');
+        });
+      });
+    });
+    solo_test('final', () {
+      expect(s.toString(), "EGHIHJHKHL");
+    });
+  }, [
+    {
+      'description': 'non-solo group solo_test in non-solo group',
+      'result': 'pass',
+    },
+    {'description': 'solo group solo group non-solo test', 'result': 'pass',},
+    {'description': 'solo group solo group solo test', 'result': 'pass',},
+    {
+      'description': 'solo group nested non-solo group in solo group '
+          'nested non-solo group non-solo test',
+      'result': 'pass',
+    },
+    {
+      'description': 'solo group nested non-solo group in solo group '
+          'nested non-solo group solo test',
+      'result': 'pass',
+    },
+    {'description': 'final', 'result': 'pass',}
+  ]);
+}