LibTest/io/ProcessSignal/watch_A01_t01.dart

/*
 * Copyright (c) 2017, 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.
 */
/**
 * @assertion Stream<ProcessSignal> watch()
 * Watch for process signals.
 * The following ProcessSignals can be listened to:
 * - ProcessSignal.sighup.
 * - ProcessSignal.sigint. Signal sent by e.g. CTRL-C.
 * - ProcessSignal.sigterm. Not available on Windows.
 * - ProcessSignal.sigusr1. Not available on Windows.
 * - ProcessSignal.sigusr2. Not available on Windows.
 * - ProcessSignal.sigwinch. Not available on Windows.
 *
 * Other signals are disallowed, as they may be used by the VM.
 *
 * A signal can be watched multiple times, from multiple isolates, where all
 * callbacks are invoked when signaled, in no specific order.
 *
 * @description Checks that mention ProcessSignals can be watched.
 * @author ngl@unipro.ru
 */
import 'dart:convert';
import "dart:io";
import "../../../Utils/expect.dart";

check(ProcessSignal signal) {
  asyncStart();
  Process.start(Platform.executable, [
    Platform.script.resolve('watch_A01_t01_lib.dart').toFilePath(),
    signal.toString()
  ]).then((process) {
    process.stdin.close();
    process.stderr.drain();
    var output = "";
    process.stdout.transform(utf8.decoder).listen((str) {
      output += str;
      if (output == 'done\n') {
        process.kill(signal);
      }
    }, onDone: () {
      Expect.equals('done\n$signal\n', output);
    });
    process.exitCode.then((exitCode) {
      Expect.equals(0, exitCode);
      asyncEnd();
    });
  });
}

main() {
  if (!Platform.isWindows) {
    check(ProcessSignal.sighup);
    check(ProcessSignal.sigint);
    check(ProcessSignal.sigterm);
    check(ProcessSignal.sigusr1);
    check(ProcessSignal.sigusr2);
    check(ProcessSignal.sigwinch);
  }
}