Migrated test block 167 to Dart 2.0.

tests/lib/async/catch_errors23_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:async_helper/async_helper.dart';
-import "package:expect/expect.dart";
-import 'dart:async';
-import 'catch_errors.dart';
-
-main() {
-  asyncStart();
-  Completer done = new Completer();
-
-  var events = [];
-  StreamController controller;
-  Stream stream;
-  // Test that errors are not traversing zone boundaries.
-  // Note that the first listener of `asBroadcastStream` determines in which
-  // zone the subscription lives.
-  catchErrors(() {
-    catchErrors(() {
-      controller = new StreamController();
-
-      // Assign to "global" `stream`.
-      stream = controller.stream.map((x) {
-        events.add("map $x");
-        return x + 100;
-      }).transform(
-          new StreamTransformer.fromHandlers(handleError: (e, st, sink) {
-        sink.add("error $e");
-      })).asBroadcastStream();
-
-      // Listen to `stream` in the inner zone.
-      stream.listen((x) {
-        events.add("stream $x");
-      });
-    })
-        .listen((x) {
-          events.add(x);
-        })
-        .asFuture()
-        .then((_) {
-          Expect.fail("Unexpected callback");
-        });
-
-    // Listen to `stream` in the outer zone.
-    stream.listen((x) {
-      events.add("stream2 $x");
-    });
-
-    // Feed the controller from the outer zone.
-    controller.add(1);
-    // `addError` does not count as zone-traversal. It should be caught by
-    // the inner error handler.
-    controller.addError("inner error");
-    new Future.error("caught by outer");
-    controller.close();
-  }).listen((x) {
-    events.add("outer: $x");
-    if (x == "caught by outer") done.complete(true);
-  }, onDone: () {
-    Expect.fail("Unexpected callback");
-  });
-
-  done.future.whenComplete(() {
-    // Give handlers time to run.
-    Timer.run(() {
-      Expect.listEquals([
-        "map 1",
-        "stream 101",
-        "stream2 101",
-        "stream error inner error",
-        "stream2 error inner error",
-        "outer: caught by outer",
-      ], events);
-      asyncEnd();
-    });
-  });
-}