LibTest/io/ProcessResult/stderr_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.

// @dart = 2.9

/// @assertion dynamic stderr
///
/// Standard error from the process. The value used for the stderrEncoding
/// argument to Process.run determines the type. If null was used this value is
/// of type List<int> otherwise it is of type String.
///
/// @description Checks that if constructor [ProcessResult] creates a new object
/// of type ProcessResult with the same parameters as ProcessResult received
/// after completion Process.run method and stdoutEncoding was not set to null
/// for completed Process.run method, the [stderr] returns String value.
/// @author ngl@unipro.ru

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

main() {
  String command = Platform.resolvedExecutable;
  List<String> args = ['--version'];
  Future<ProcessResult> fProcessResult = Process.run(command, args);
  fProcessResult.then((ProcessResult result) {
    dynamic stdErr = result.stderr;
    ProcessResult pr = new ProcessResult(
        result.pid, result.exitCode, result.stdout, result.stderr);
    Expect.isTrue(pr.stderr is String);
    Expect.isTrue(pr.stderr == stdErr);
  });
}