LibTest/io/Process/start_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
 * Future<Process> start(
 *     String executable,
 *     List<String> arguments, {
 *     String workingDirectory,
 *     Map<String, String> environment,
 *     bool includeParentEnvironment: true,
 *     bool runInShell: false,
 *     ProcessStartMode mode: ProcessStartMode.normal
 * })
 *
 * Starts a process running the executable with the specified arguments.
 * Returns a Future<Process> that completes with a Process instance when the
 * process has been successfully started. That Process object can be used to
 * interact with the process. If the process cannot be started the returned
 * Future completes with an exception.
 *
 * @description Checks that static method [start] starts a process running the
 * executable with the specified arguments. Returns a Future<Process> that
 * completes with a Process instance when the process has been successfully
 * started. Check running dart test that finished successfully.
 * @author ngl@unipro.ru
 */
import "dart:convert";
import "dart:io";
import "../../../Utils/expect.dart";

runMain() {
  String executable = Platform.resolvedExecutable;
  String eScript = Platform.script.toString();

  asyncStart();
  Process.start(executable, [...Platform.executableArguments, eScript, "run"])
      .then((Process process) {
    process.stdout.transform(utf8.decoder).transform(const LineSplitter()).
          toList().then((List outList) {
      Expect.equals("Lily was here", outList[0]);
    }).then((_) {
      process.stderr.transform(utf8.decoder).transform(const LineSplitter()).
          toList().then((List errList) {
        Expect.equals(0, errList.length);
        asyncEnd();
      });
    });
  });
}

runProcess() {
  stdout.write("Lily was here");
}

main(List<String> args) {
  if (args.length > 0)
    runProcess();
  else {
    runMain();
  }
}