LibTest/io/Stdout/addError_A01_t01.dart

// Copyright (c) 2018, 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 void add(List<int> data)
/// void addError(error, [StackTrace stackTrace])
/// Passes the [error] to the target consumer as an error event.
/// @description Checks that [error] appears in [stderr] as a result of the
/// [addError] method call.
/// @author iarkh@unipro.ru

import "../../../Utils/expect.dart";
import "dart:io";

run_process(IOSink sink) {
  sink.addError("my test error");
}

run_main(String mode) async {
  String executable = Platform.resolvedExecutable;
  String eScript = Platform.script.toString();
  int called = 0;
  await Process.run(
          executable, [...Platform.executableArguments, eScript, mode])
      .then((ProcessResult results) {
    Expect.isTrue(results.stderr.contains("my test error"));
    Expect.equals(0, results.stdout.length);
    called++;
  });
  Expect.equals(1, called);
}

main(List<String> args) {
  if (args.length > 0)
    run_process(args[0] == "err" ? stderr : stdout);
  else {
    run_main("out");
    run_main("err");
  }
}