LibTest/io/Stdin/first_A02_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 Future<T> first
 * Stops listening to the stream after the first element has been received.
 * Internally the method cancels its subscription after the first element. This
 * means that single-subscription (non-broadcast) streams are closed and cannot
 * be reused after a call to this getter.
 * @description Checks that listening to [stdin] is stopped after the [first]
 * method call.
 * @author iarkh@unipro.ru
 */
import "../../../Utils/expect.dart";
import "dart:io";

run_process() async {
  await stdin.first.then((_) async {
    try {
      stdin.listen((_) {
        exit(99);
      });
    } catch (e) {
      exit(0);
    }
  });
}

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

  await Process.start(
          executable, [...Platform.executableArguments, eScript, "test"],
          runInShell: true)
      .then((Process process) async {
    process.stdin.writeln("Testme");
    await process.exitCode.then((int code) async {
      Expect.equals(0, code);
      called++;
    });
  });
  Expect.equals(1, called);
}

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