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// 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.
// Example of spawning an isolate from a function.
library spawn_tests;
import 'dart:isolate';
import 'package:async_helper/async_helper.dart';
import 'package:expect/expect.dart';
isolateEntryPoint(args) {
var msg = args[0];
var sendPort = args[1];
sendPort.send('re: $msg');
}
Future<void> main([args, port]) async {
// message - reply chain
const String debugName = 'spawnedIsolate';
ReceivePort port = new ReceivePort();
asyncStart();
port.listen((msg) {
port.close();
Expect.equals(msg, 're: hi');
asyncEnd();
});
// Start new isolate; paused so it's alive till we read the debugName.
// If the isolate runs to completion, the isolate might get cleaned up
// and debugName might be null.
final isolate = await Isolate.spawn(isolateEntryPoint, ['hi', port.sendPort],
paused: true, debugName: debugName);
Expect.equals(isolate.debugName, debugName);
isolate.resume(isolate.pauseCapability!);
}