Add location information to the JSON reporter.

lib/src/backend/invoker.dart

 // Copyright (c) 2015, 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 'dart:async';
 
 import 'package:stack_trace/stack_trace.dart';
 
 import '../backend/group.dart';
 import '../frontend/expect.dart';
 import '../runner/load_suite.dart';
 import '../utils.dart';
 import 'closed_exception.dart';
 import 'live_test.dart';
 import 'live_test_controller.dart';
 import 'metadata.dart';
 import 'operating_system.dart';
 import 'outstanding_callback_counter.dart';
 import 'state.dart';
 import 'suite.dart';
 import 'test.dart';
 import 'test_platform.dart';
 
 /// A test in this isolate.
 class LocalTest extends Test {
   final String name;
   final Metadata metadata;
+  final Trace trace;
 
   /// The test body.
   final AsyncFunction _body;
 
-  LocalTest(this.name, this.metadata, body())
+  LocalTest(this.name, this.metadata, body(), {this.trace})
       : _body = body;
 
   /// Loads a single runnable instance of this test.
   LiveTest load(Suite suite, {Iterable<Group> groups}) {
     var invoker = new Invoker._(suite, this, groups: groups);
     return invoker.liveTest;
   }
 
   Test forPlatform(TestPlatform platform, {OperatingSystem os}) {
     if (!metadata.testOn.evaluate(platform, os: os)) return null;
-    return new LocalTest(name, metadata.forPlatform(platform, os: os), _body);
+    return new LocalTest(name, metadata.forPlatform(platform, os: os), _body,
+        trace: trace);
   }
 }
 
 /// The class responsible for managing the lifecycle of a single local test.
 ///
 /// The current invoker is accessible within the zone scope of the running test
 /// using [Invoker.current]. It's used to track asynchronous callbacks and
 /// report asynchronous errors.
 class Invoker {
   /// The live test being driven by the invoker.
@@ skipping 244 matching lines @@
         // outstanding callback counters at once.
         _counterKey: outstandingCallbacksForBody,
         _closableKey: true
       },
           zoneSpecification: new ZoneSpecification(
               print: (self, parent, zone, line) => _controller.print(line)),
           onError: _handleError);
     });
   }
 }