tests/isolate/message_stream2_test.dart

// Copyright (c) 2012, 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.

// Dart test program for testing serialization of messages.
// VMOptions=--enable_type_checks --enable_asserts

library Message2Test;
import 'dart:isolate';
import '../../pkg/unittest/lib/unittest.dart';

// ---------------------------------------------------------------------------
// Message passing test 2.
// ---------------------------------------------------------------------------

class MessageTest {
  static void mapEqualsDeep(Map expected, Map actual) {
    expect(expected, isMap);
    expect(actual, isMap);
    expect(actual.length, expected.length);
    testForEachMap(key, value) {
      if (value is List) {
        listEqualsDeep(value, actual[key]);
      } else {
        expect(actual[key], value);
      }
    }
    expected.forEach(testForEachMap);
  }

  static void listEqualsDeep(List expected, List actual) {
    for (int i = 0; i < expected.length; i++) {
      if (expected[i] is List) {
        listEqualsDeep(expected[i], actual[i]);
      } else if (expected[i] is Map) {
        mapEqualsDeep(expected[i], actual[i]);
      } else {
        expect(actual[i], expected[i]);
      }
    }
  }
}

void pingPong() {
  bool isFirst = true;
  IsolateSink replyTo;
  stream.listen((var message) {
    if (isFirst) {
      isFirst = false;
      replyTo = message;
      return;
    }
    // Bounce the received object back so that the sender
    // can make sure that the object matches.
    replyTo.add(message);
  });
}

main() {
  test("map is equal after it is sent back and forth", () {
    IsolateSink remote = streamSpawnFunction(pingPong);
    Map m = new Map();
    m[1] = "eins";
    m[2] = "deux";
    m[3] = "tre";
    m[4] = "four";
    MessageBox box = new MessageBox();
    remote.add(box.sink);
    remote.add(m);
    box.stream.listen(expectAsync1((var received) {
      MessageTest.mapEqualsDeep(m, received);
      remote.close();
      box.stream.close();
    }));
  });
}