tests/standalone/io/process_stdout_test.dart

// Copyright (c) 2012, 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.
//
// Process test program to test process communication.
//
// VMOptions=
// VMOptions=--short_socket_read
// VMOptions=--short_socket_write
// VMOptions=--short_socket_read --short_socket_write

#import("dart:io");
#import("dart:math");

#source("process_test_util.dart");

void test(Process process, int expectedExitCode) {
  // Wait for the process to start and then interact with it.
  process.onStart = () {
    List<int> data = "ABCDEFGHI\n".charCodes();
    final int dataSize = data.length;

    InputStream input = process.stdout;
    OutputStream output = process.stdin;

    int received = 0;
    List<int> buffer = [];

    void readData() {
      buffer.addAll(input.read());
      for (int i = received;
           i < min(data.length, buffer.length) - 1;
           i++) {
        Expect.equals(data[i], buffer[i]);
      }
      received = buffer.length;
      if (received >= dataSize) {
        // We expect an extra character on windows due to carriage return.
        if (13 === buffer[dataSize - 1] && dataSize + 1 === received) {
          Expect.equals(13, buffer[dataSize - 1]);
          Expect.equals(10, buffer[dataSize]);
          buffer.removeLast();
          process.close();
        } else if (received === dataSize) {
          process.close();
        }
      }
    }

    output.write(data);
    output.close();
    input.onData = readData;
  };

  process.onExit = (exitCode) {
    Expect.equals(expectedExitCode, exitCode);
  };
}

main() {
  // Run the test using the process_test binary.
  test(Process.start(getProcessTestFileName(),
                     const ["0", "1", "99", "0"]), 99);

  // Run the test using the dart binary with an echo script.
  // The test runner can be run from either the root or from runtime.
  var scriptFile = new File("tests/standalone/io/process_std_io_script.dart");
  if (!scriptFile.existsSync()) {
    scriptFile = new File("../tests/standalone/io/process_std_io_script.dart");
  }
  Expect.isTrue(scriptFile.existsSync());
  test(Process.start(new Options().executable, [scriptFile.name, "0"]), 0);
}