Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/unittest/vm_config.dart

Index: observatory_pub_packages/unittest/vm_config.dart
===================================================================
--- observatory_pub_packages/unittest/vm_config.dart	(revision 0)
+++ observatory_pub_packages/unittest/vm_config.dart	(working copy)
@@ -0,0 +1,65 @@
+// 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.
+
+/// A simple unit test library for running tests on the VM.
+library unittest.vm_config;
+
+import 'dart:async';
+import 'dart:io';
+import 'unittest.dart';
+
+class VMConfiguration extends SimpleConfiguration {
+  // Color constants used for generating messages.
+  final String GREEN_COLOR = '\u001b[32m';
+  final String RED_COLOR = '\u001b[31m';
+  final String MAGENTA_COLOR = '\u001b[35m';
+  final String NO_COLOR = '\u001b[0m';
+
+  // We make this public so the user can turn it off if they want.
+  bool useColor;
+
+  VMConfiguration()
+      : super(),
+        useColor = stdioType(stdout) == StdioType.TERMINAL;
+
+  String formatResult(TestCase testCase) {
+    String result = super.formatResult(testCase);
+    if (useColor) {
+      if (testCase.result == PASS) {
+        return "${GREEN_COLOR}${result}${NO_COLOR}";
+      } else if (testCase.result == FAIL) {
+        return "${RED_COLOR}${result}${NO_COLOR}";
+      } else if (testCase.result == ERROR) {
+        return "${MAGENTA_COLOR}${result}${NO_COLOR}";
+      }
+    }
+    return result;
+  }
+
+  void onInit() {
+    super.onInit();
+    filterStacks = formatStacks = true;
+  }
+
+  void onDone(bool success) {
+    int status;
+    try {
+      super.onDone(success);
+      status = 0;
+    } catch (ex) {
+      // A non-zero exit code is used by the test infrastructure to detect
+      // failure.
+      status = 1;
+    }
+    Future.wait([stdout.close(), stderr.close()]).then((_) {
+      exit(status);
+    });
+  }
+}
+
+void useVMConfiguration() {
+  unittestConfiguration = _singleton;
+}
+
+final _singleton = new VMConfiguration();