// 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 int readByteSync()
/// This call will block until a byte is available.
/// @description Checks that call is blocked until a byte is available.
/// @author iarkh@unipro.ru
/// @issue https://github.com/dart-lang/co19/issues/970

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

run_process() async {
  // Read and print the first byte ([5])
  stdout.write(stdin.readByteSync());
  // Try to read and print the second byte (no input here, [-1] passes when
  // process finishes) - all is blocked before
  stdout.write(stdin.readByteSync());
  // print [OK] finally
  print("OK");
}

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.add([5]);
    await new Future.delayed(new Duration(seconds: 2)).then((_) async {
      await process.stdin.close();
      await process.exitCode.then((_) async {
        process.stderr.toList().then((errors) {
          Expect.isTrue(errors.isEmpty);
        });
        await process.stdout.toList().then((out) {
          // Expected result is: [5-1OK] string
          Expect.listEquals([53, 45, 49, 79, 75, 10], flattenList<int>(out));
          called++;
        });
      });
    });
  });
  Expect.equals(1, called);
}

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