tests/lib/async/catch_errors16_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 'dart:async';

import 'package:expect/async_helper.dart';
import 'package:expect/expect.dart';

import 'catch_errors.dart';

void main() {
  asyncStart();
  var events = [];
  StreamController controller = StreamController();
  Stream stream = controller.stream;
  // Test that the subscription of a stream is what counts. The error (2) runs
  // through the map-stream which goes through the nested `catchError` but
  // the nested `catchError` won't see the error.
  catchErrors(() {
    stream = stream.map((x) => x + 100);
  }).listen((x) {
    events.add(x);
  });
  stream
      .transform(
        StreamTransformer.fromHandlers(
          handleError: (e, st, sink) {
            sink.add("error $e");
          },
        ),
      )
      .listen(
        (x) {
          events.add("stream $x");
        },
        onDone: () {
          Expect.listEquals(["stream 101", "stream error 2"], events);
          asyncEnd();
        },
      );
  controller.add(1);
  controller.addError(2);
  controller.close();
}