Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/unittest/src/configuration.dart

Index: observatory_pub_packages/unittest/src/configuration.dart
===================================================================
--- observatory_pub_packages/unittest/src/configuration.dart	(revision 0)
+++ observatory_pub_packages/unittest/src/configuration.dart	(working copy)
@@ -0,0 +1,69 @@
+// 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.configuration;
+
+import 'package:unittest/unittest.dart' show TestCase, SimpleConfiguration;
+
+/// Describes the interface used by the unit test system for communicating the
+/// results of a test run.
+abstract class Configuration {
+
+  /// Creates an instance of [SimpleConfiguration].
+  factory Configuration() => new SimpleConfiguration();
+
+  /// Creates an [Configuration] instances that does nothing.
+  ///
+  /// For use by subclasses which wish to implement only a subset of features.
+  Configuration.blank();
+
+  /// If [:true:], tests are started automatically. Otherwise [runTests]
+  /// must be called explicitly after tests are set up.
+  bool get autoStart => true;
+
+  /// How long a [TestCase] can run before it is considered an error.
+  /// A [timeout] value of [:null:] means that the limit is infinite.
+  Duration timeout = const Duration(minutes: 2);
+
+  /// Called as soon as the unittest framework becomes initialized.
+  ///
+  /// This is done even before tests are added to the test framework. It might
+  /// be used to determine/debug errors that occur before the test harness
+  /// starts executing. It is also used to tell the vm or browser that tests are
+  /// going to be run asynchronously and that the process should wait until they
+  /// are done.
+  void onInit() {}
+
+  /// Called as soon as the unittest framework starts running.
+  void onStart() {}
+
+  /// Called when each test starts. Useful to show intermediate progress on
+  /// a test suite.
+  void onTestStart(TestCase testCase) {}
+
+  /// Called when each test is first completed. Useful to show intermediate
+  /// progress on a test suite.
+  void onTestResult(TestCase testCase) {}
+
+  /// Called when an already completed test changes state. For example: a test
+  /// that was marked as passing may later be marked as being in error because
+  /// it still had callbacks being invoked.
+  void onTestResultChanged(TestCase testCase) {}
+
+  /// Handles the logging of messages by a test case.
+  void onLogMessage(TestCase testCase, String message) {}
+
+  /// Called when the unittest framework is done running. [success] indicates
+  /// whether all tests passed successfully.
+  void onDone(bool success) {}
+
+  /// Called with the result of all test cases. Browser tests commonly override
+  /// this to reformat the output.
+  ///
+  /// When [uncaughtError] is not null, it contains an error that occured outside
+  /// of tests (e.g. setting up the test).
+  void onSummary(int passed, int failed, int errors, List<TestCase> results,
+      String uncaughtError) {}
+}
+