LibTest/io/Stdin/first_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.

// @dart = 2.9

/// @assertion Future<T> first
/// Returns the first element of the stream.
/// @description Checks that just entered line is returned
/// @author iarkh@unipro.ru

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

run_process() {
  stdin.first.then((List<int> l) { print(new String.fromCharCodes(l)); });
}

run_main() async {
  String executable = Platform.resolvedExecutable;
  String eScript = Platform.script.toString();
  int called = 0;

  await Process.start(executable, [eScript, "test"], runInShell: true).then(
      (Process process) async {
    process.stdin.writeln("Testme");
    await process.stderr.toList().then((errors){
      Expect.isTrue(errors.isEmpty);
    });

    final String stdout = await process.stdout.transform(systemEncoding.decoder).join();
    Expect.isTrue("Testme\n\n".startsWith(stdout.replaceAll("\r\n", "\n")));
    called++;
  });
  Expect.equals(1, called);
}

main(List<String> args) { args.length > 0 ? run_process() : run_main(); }