Modify tests to use Directory.systemTemp

tests/standalone/io/file_system_async_links_test.dart

 // Copyright (c) 2013, 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:async";
 import "dart:io";
 
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 class FutureExpect {
   static Future isTrue(Future<bool> result) =>
       result.then((value) => Expect.isTrue(value));
   static Future isFalse(Future<bool> result) =>
       result.then((value) => Expect.isFalse(value));
   static Future equals(expected, Future result) =>
       result.then((value) => Expect.equals(expected, value));
   static Future listEquals(expected, Future result) =>
       result.then((value) => Expect.listEquals(expected, value));
   static Future throws(Future result) =>
       result.then((value) {
         throw new ExpectException(
             "FutureExpect.throws received $value instead of an exception");
         }, onError: (_) => null);
 }
 
 
 Future testFileExistsCreate() {
-  return new Directory('').createTemp().then((temp) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) {
     var x = '${temp.path}${Platform.pathSeparator}x';
     var y = '${temp.path}${Platform.pathSeparator}y';
     return new Link(y).create(x)
     .then((link) => Expect.equals(y, link.path))
     .then((_) => FutureExpect.isFalse(new File(y).exists()))
     .then((_) => FutureExpect.isFalse(new File(x).exists()))
     .then((_) => FutureExpect.isTrue(FileSystemEntity.isLink(y)))
     .then((_) => FutureExpect.isFalse(FileSystemEntity.isLink(x)))
     .then((_) => FutureExpect.equals(FileSystemEntityType.NOT_FOUND,
                                      FileSystemEntity.type(y)))
@@ skipping 51 matching lines @@
                                      FileSystemEntity.type(y)))
     .then((_) => FutureExpect.equals(FileSystemEntityType.DIRECTORY,
                                      FileSystemEntity.type(x)))
     .then((_) => FutureExpect.throws(new Link(y).target()))
     .then((_) => temp.delete(recursive: true));
   });
 }
 
 
 Future testFileDelete() {
-  return new Directory('').createTemp().then((temp) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) {
     var x = '${temp.path}${Platform.pathSeparator}x';
     var y = '${temp.path}${Platform.pathSeparator}y';
     return new File(x).create()
     .then((_) => new Link(y).create(x))
     .then((_) => FutureExpect.isTrue(new File(x).exists()))
     .then((_) => FutureExpect.isTrue(new File(y).exists()))
     .then((_) => new File(y).delete())
     .then((_) => FutureExpect.isTrue(new File(x).exists()))
     .then((_) => FutureExpect.isFalse(new File(y).exists()))
     .then((_) => new Link(y).create(x))
     .then((_) => FutureExpect.isTrue(new File(x).exists()))
     .then((_) => FutureExpect.isTrue(new File(y).exists()))
     .then((_) => new File(y).delete())
     .then((_) => FutureExpect.isTrue(new File(x).exists()))
     .then((_) => FutureExpect.isFalse(new File(y).exists()))
     .then((_) => temp.delete(recursive: true));
   });
 }
 
 
 Future testFileWriteRead() {
-  return new Directory('').createTemp().then((temp) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) {
     var x = '${temp.path}${Platform.pathSeparator}x';
     var y = '${temp.path}${Platform.pathSeparator}y';
     var data = "asdf".codeUnits;
     return new File(x).create()
     .then((_) => new Link(y).create(x))
     .then((_) =>
           (new File(y).openWrite(mode: FileMode.WRITE)..add(data)).close())
     .then((_) => FutureExpect.listEquals(data, new File(y).readAsBytes()))
     .then((_) => FutureExpect.listEquals(data, new File(x).readAsBytes()))
     .then((_) => temp.delete(recursive: true));
   });
 }
 
 
 Future testDirectoryExistsCreate() {
-  return new Directory('').createTemp().then((temp) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) {
     var x = '${temp.path}${Platform.pathSeparator}x';
     var y = '${temp.path}${Platform.pathSeparator}y';
     return new Link(y).create(x)
     .then((_) => FutureExpect.isFalse(new Directory(x).exists()))
     .then((_) => FutureExpect.isFalse(new Directory(y).exists()))
     .then((_) => FutureExpect.throws(new Directory(y).create()))
     .then((_) => temp.delete(recursive: true));
   });
 }
 
 
 Future testDirectoryDelete() {
-  return new Directory('').createTemp().then((temp) =>
-  new Directory('').createTemp().then((temp2) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) =>
+  Directory.createSystemTemp('dart_file_system_async').then((temp2) {
     var y = '${temp.path}${Platform.pathSeparator}y';
     var x = '${temp2.path}${Platform.pathSeparator}x';
     var link = new Directory(y);
     return new File(x).create()
     .then((_) => new Link(y).create(temp2.path))
     .then((_) => FutureExpect.isTrue(link.exists()))
     .then((_) => FutureExpect.isTrue(temp2.exists()))
     .then((_) => link.delete())
     .then((_) => FutureExpect.isFalse(link.exists()))
     .then((_) => FutureExpect.isTrue(temp2.exists()))
     .then((_) => new Link(y).create(temp2.path))
     .then((_) => FutureExpect.isTrue(link.exists()))
     .then((_) => temp.delete(recursive: true))
     .then((_) => FutureExpect.isFalse(link.exists()))
     .then((_) => FutureExpect.isFalse(temp.exists()))
     .then((_) => FutureExpect.isTrue(temp2.exists()))
     .then((_) => FutureExpect.isTrue(new File(x).exists()))
     .then((_) => temp2.delete(recursive: true));
   }));
 }
 
 
 Future testDirectoryListing() {
-  return new Directory('').createTemp().then((temp) =>
-  new Directory('').createTemp().then((temp2) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) =>
+  Directory.createSystemTemp('dart_file_system_async_links').then((temp2) {
     var sep = Platform.pathSeparator;
     var y = '${temp.path}${sep}y';
     var x = '${temp2.path}${sep}x';
     return new File(x).create()
     .then((_) => new Link(y).create(temp2.path))
     .then((_) => temp.list(recursive: true).singleWhere(
         (entry) => entry is File))
     .then((file) => Expect.isTrue(file.path.endsWith('$y${sep}x')))
     .then((_) => temp.list(recursive: true).singleWhere(
         (entry) => entry is Directory))
     .then((dir) => Expect.isTrue(dir.path.endsWith('y')))
     .then((_) => temp.delete(recursive: true))
     .then((_) => temp2.delete(recursive: true));
   }));
 }
 
 
 Future testDirectoryListingBrokenLink() {
-  return new Directory('').createTemp().then((temp) {
+  return Directory.createSystemTemp('dart_file_system_async').then((temp) {
     var x = '${temp.path}${Platform.pathSeparator}x';
     var link = '${temp.path}${Platform.pathSeparator}link';
     var doesNotExist = 'this_thing_does_not_exist';
     bool sawFile = false;
     bool sawLink = false;
     return new File(x).create()
     .then((_) => new Link(link).create(doesNotExist))
     .then((_) => temp.list(recursive: true).forEach(
       (entity) {
         if (entity is File) {
@@ skipping 20 matching lines @@
     testFileExistsCreate()
     .then((_) => testFileDelete())
     .then((_) => testFileWriteRead())
     .then((_) => testDirectoryExistsCreate())
     .then((_) => testDirectoryDelete())
     .then((_) => testDirectoryListing())
     .then((_) => testDirectoryListingBrokenLink())
     .then((_) => asyncEnd());
   }
 }