Move all tests using dart:io to a separate directory

tests/standalone/src/ProcessStderrTest.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
-
-#library("ProcessStderrTest");
-#import("dart:io");
-#source("ProcessTestUtil.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.stderr;
-    OutputStream output = process.stdin;
-
-    int received = 0;
-    List<int> buffer = [];
-
-    void readData() {
-      buffer.addAll(input.read());
-      for (int i = received;
-           i < Math.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(new Process.start(getProcessTestFileName(),
-                         const ["1", "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/src/ProcessStdIOScript.dart");
-  if (!scriptFile.existsSync()) {
-    scriptFile = new File("../tests/standalone/src/ProcessStdIOScript.dart");
-  }
-  Expect.isTrue(scriptFile.existsSync());
-  test(new Process.start(getDartFileName(), [scriptFile.name, "1"]), 0);
-}