Reapply "Zone support for Futures, Timer, Streams."

tests/lib/async/catch_errors13_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.
+
+import "package:expect/expect.dart";
+import 'dart:async';
+import 'dart:isolate';
+import 'catch_errors.dart';
+
+main() {
+  // We keep a ReceivePort open until all tests are done. This way the VM will
+  // hang if the callbacks are not invoked and the test will time out.
+  var port = new ReceivePort();
+  var events = [];
+  // Work around bug that makes runAsync use Timers. By invoking `runAsync` here
+  // we make sure that asynchronous non-timer events are executed before any
+  // Timer events.
+  runAsync(() { });
+
+  // Test that errors are caught by nested `catchErrors`. Also uses `runAsync`
+  // in the body of a Timer.
+  catchErrors(() {
+    events.add("catch error entry");
+    catchErrors(() {
+      events.add("catch error entry2");
+      Timer.run(() { throw "timer error"; });
+      new Timer(const Duration(milliseconds: 50),
+                () {
+                     runAsync(() { throw "runAsync"; });
+                     throw "delayed error";
+                   });
+    }).listen((x) { events.add(x); })
+      .asFuture()
+      .then((_) => events.add("inner done"))
+      .then((_) { throw "inner done throw"; });
+    events.add("after inner");
+    Timer.run(() { throw "timer outer"; });
+    throw "inner throw";
+  }).listen((x) {
+      events.add(x);
+    },
+    onDone: () {
+      Expect.listEquals([
+                         "catch error entry",
+                         "catch error entry2",
+                         "after inner",
+                         "main exit",
+                         "inner throw",
+                         "timer error",
+                         "timer outer",
+                         "delayed error",
+                         "runAsync",
+                         "inner done",
+                         "inner done throw"
+                         ],
+                         events);
+      port.close();
+    });
+  events.add("main exit");
+}