Support stacktrace and objecthistogram service commands

tests/standalone/vmservice/isolate_stacktrace_command_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 isolate_stacktrace_command_test;
+
+import 'test_helper.dart';
+import 'package:expect/expect.dart';
+
+class StacktraceTest extends VmServiceRequestHelper {
+  StacktraceTest(port, id) :
+      super('http://127.0.0.1:$port/isolates/$id/stacktrace');
+
+  onRequestCompleted(Map reply) {
+    Expect.equals('StackTrace', reply['type'], 'Not a StackTrace message.');
+    Expect.equals(4, reply['members'].length, 'Stacktrace is wrong length.');
+    Expect.equals('a', reply['members'][0]['name']);
+    Expect.equals('b', reply['members'][1]['name']);
+    Expect.equals('c', reply['members'][2]['name']);
+    Expect.equals('myIsolateName', reply['members'][3]['name']);
+  }
+}
+
+class IsolateListTest extends VmServiceRequestHelper {
+  IsolateListTest(port) : super('http://127.0.0.1:$port/isolates');
+
+  int _isolateId;
+  onRequestCompleted(Map reply) {
+    IsolateListTester tester = new IsolateListTester(reply);
+    tester.checkIsolateCount(2);
+    _isolateId = tester.checkIsolateNameContains('myIsolateName');
+  }
+}
+
+
+main() {
+  var process = new TestLauncher('isolate_stacktrace_command_script.dart');
+  process.launch().then((port) {
+    var test = new IsolateListTest(port);
+    test.makeRequest().then((_) {
+      var stacktraceTest = new StacktraceTest(port, test._isolateId);
+      stacktraceTest.makeRequest().then((_) {
+        process.requestExit();
+      });
+    });
+  });
+}