Add test that passes invalid arguments to socket methods and fix

tests/standalone/io/socket_invalid_arguments_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.
+
+#import("dart:io");
+
+class NotAnInteger {
+  operator==(other) => other == 1;
+  operator<(other) => other > 1;
+  operator+(other) => 1;
+}
+
+class NotAList {
+  get length() => 10;
+  operator[](index) => 1;
+}
+
+testSocketCreation(host, port) {
+  var s = new Socket(host, port);
+  s.onError = (e) => null;
+  s.onConnect = () => Expect.fail("Shouldn't get connected");
+}
+
+testReadList(buffer, offset, length) {
+  var server = new ServerSocket("127.0.0.1", 0, 5);
+  var s = new Socket("127.0.0.1", server.port);
+  s.onConnect = () {
+    try { s.readList(buffer, offset, length); } catch (var e) {}
+    s.close();
+  };
+  s.onError = (e) => null;
+}
+
+testWriteList(buffer, offset, length) {
+  var server = new ServerSocket("127.0.0.1", 0, 5);
+  var s = new Socket("127.0.0.1", server.port);
+  s.onConnect = () {
+    try { s.writeList(buffer, offset, length); } catch (var e) {}
+    s.close();
+  };
+  s.onError = (e) => null;
+}
+
+testServerSocketCreation(address, port, backlog) {
+  var server;
+  try {
+    server = new ServerSocket(address, port, backlog);
+    server.onError = (e) => null;
+    server.onConnection = (c) => Expect.fail("Shouldn't get connection");
+  } catch (var e) {
+    // ignore
+  }
+}
+
+main() {
+  testSocketCreation(123, 123);
+  testSocketCreation("string", null);
+  testSocketCreation(null, null);
+  testReadList(null, 123, 123);
+  testReadList(new NotAList(), 1, 1);
+  testReadList([1, 2, 3], new NotAnInteger(), new NotAnInteger());
+  testReadList([1, 2, 3], 1, new NotAnInteger());
+  testWriteList(null, 123, 123);
+  testWriteList(new NotAList(), 1, 1);
+  testWriteList([1, 2, 3], new NotAnInteger(), new NotAnInteger());
+  testWriteList([1, 2, 3], 1, new NotAnInteger());
+  testWriteList([1, 2, 3], new NotAnInteger(), 1);
+  testServerSocketCreation(123, 123, 123);
+  testServerSocketCreation("string", null, null);
+  testServerSocketCreation("string", 123, null);
+}