LibTest/io/Process/start_A05_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
/// Future<Process> start(
///     String executable,
///     List<String> arguments, {
///     String workingDirectory,
///     Map<String, String> environment,
///     bool includeParentEnvironment: true,
///     bool runInShell: false,
///     ProcessStartMode mode: ProcessStartMode.normal
/// })
///
/// If mode is ProcessStartMode.DETACHED a detached process will be created. A
/// detached process has no connection to its parent, and can keep running on its
/// own when the parent dies. The only information available from a detached
/// process is its pid. There is no connection to its stdin, stdout or stderr,
/// nor will the process' exit code become available when it terminates.
///
/// @description Checks that if mode is ProcessStartMode.DETACHED a detached
/// process will be created. The only information available from a detached
/// process is its pid. There is no connection to its stdin, stdout or stderr,
/// nor will the process' exit code become available when it terminates.
/// @author ngl@unipro.ru

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

String command = "";
List<String> args = new List<String>.empty(growable: true);

void setCommand() {
  if (Platform.isWindows) {
    command = Platform.resolvedExecutable;
    args = ['--version'];
  } else {
    command = 'pwd';
    args = [];
  }
}

main() {
  setCommand();
  Process
      .start(command, args, mode: ProcessStartMode.detached)
      .then((Process process) {
    Expect.isTrue(process.pid is int);
    Expect.runtimeIsType<int>(process.pid);
    Expect.throws(() {process.stdout;}, (e) => e is StateError);
    Expect.throws(() {process.stderr;}, (e) => e is StateError);
    Expect.throws(() {process.stdin;}, (e) => e is StateError);
    Expect.throws(() {process.exitCode;}, (e) => e is StateError);
  });
}