Modify tests to use Directory.systemTemp

tests/standalone/io/file_system_exists_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 "package:expect/expect.dart";
 import "dart:io";
 
 void testFileExistsSync() {
-  var tmp = new Directory("").createTempSync();
+  var tmp = Directory.systemTemp.createTempSync('dart_file_system_exists');
   var path = "${tmp.path}${Platform.pathSeparator}";
 
   var file = new File("${path}myFile");
   file.createSync();
 
   Expect.isTrue(new File(file.path).existsSync());
   Expect.isFalse(new Directory(file.path).existsSync());
   Expect.isFalse(new Link(file.path).existsSync());
 
   file.deleteSync();
   Expect.isFalse(file.existsSync());
 
   tmp.deleteSync();
 }
 
 void testFileExists() {
-  new Directory("").createTemp().then((tmp) {
+  Directory.systemTemp.createTemp('dart_file_system_exists').then((tmp) {
     var path = "${tmp.path}${Platform.pathSeparator}";
     var file = new File("${path}myFile");
     return file.create()
       .then((_) => new File(file.path).exists().then(Expect.isTrue))
       .then((_) => new Directory(file.path).exists().then(Expect.isFalse))
       .then((_) => new Link(file.path).exists().then(Expect.isFalse))
 
       .then((_) => file.delete())
       .then((_) => tmp.delete());
   });
 }
 
 void testDirectoryExistsSync() {
-  var tmp = new Directory("").createTempSync();
+  var tmp = Directory.systemTemp.createTempSync('dart_file_system_exists');
   var path = "${tmp.path}${Platform.pathSeparator}";
 
   var dir = new Directory("${path}myDirectory");
   dir.createSync();
 
   Expect.isFalse(new File(dir.path).existsSync());
   Expect.isTrue(new Directory(dir.path).existsSync());
   Expect.isFalse(new Link(dir.path).existsSync());
 
   dir.deleteSync();
   Expect.isFalse(dir.existsSync());
 
   tmp.deleteSync();
 }
 
 void testDirectoryExists() {
-  new Directory("").createTemp().then((tmp) {
+  Directory.systemTemp.createTemp('dart_file_system_exists').then((tmp) {
     var path = "${tmp.path}${Platform.pathSeparator}";
     var dir = new Directory("${path}myDirectory");
     return dir.create()
       .then((_) => new File(dir.path).exists().then(Expect.isFalse))
       .then((_) => new Directory(dir.path).exists().then(Expect.isTrue))
       .then((_) => new Link(dir.path).exists().then(Expect.isFalse))
 
       .then((_) => dir.delete())
       .then((_) => tmp.delete());
   });
 }
 
 void testFileLinkExistsSync() {
-  var tmp = new Directory("").createTempSync();
+  var tmp = Directory.systemTemp.createTempSync('dart_file_system_exists');
   var path = "${tmp.path}${Platform.pathSeparator}";
 
   var file = new File("${path}myFile");
   file.createSync();
 
   var link = new Link("${path}myLink");
   link.createSync(file.path);
 
   Expect.isTrue(new File(link.path).existsSync());
   Expect.isFalse(new Directory(link.path).existsSync());
   Expect.isTrue(new Link(link.path).existsSync());
 
   link.deleteSync();
   Expect.isFalse(link.existsSync());
 
   file.deleteSync();
   Expect.isFalse(file.existsSync());
 
   tmp.deleteSync();
 }
 
 void testFileLinkExists() {
-  new Directory("").createTemp().then((tmp) {
+  Directory.systemTemp.createTemp('dart_file_system_exists').then((tmp) {
     var path = "${tmp.path}${Platform.pathSeparator}";
     var file = new File("${path}myFile");
     var link = new Link("${path}myLink");
     return file.create()
       .then((_) => link.create(file.path))
 
       .then((_) => new File(link.path).exists().then(Expect.isTrue))
       .then((_) => new Directory(link.path).exists().then(Expect.isFalse))
       .then((_) => new Link(link.path).exists().then(Expect.isTrue))
 
       .then((_) => link.delete())
       .then((_) => file.delete())
       .then((_) => tmp.delete());
   });
 }
 
 void testDirectoryLinkExistsSync() {
-  var tmp = new Directory("").createTempSync();
+  var tmp = Directory.systemTemp.createTempSync('dart_file_system_exists');
   var path = "${tmp.path}${Platform.pathSeparator}";
 
   var directory = new Directory("${path}myDirectory");
   directory.createSync();
 
   var link = new Link("${path}myLink");
   link.createSync(directory.path);
 
   Expect.isFalse(new File(link.path).existsSync());
   Expect.isTrue(new Directory(link.path).existsSync());
   Expect.isTrue(new Link(link.path).existsSync());
 
   link.deleteSync();
   Expect.isFalse(link.existsSync());
 
   directory.deleteSync();
   Expect.isFalse(directory.existsSync());
 
   tmp.deleteSync();
 }
 
 void testDirectoryLinkExists() {
-  new Directory("").createTemp().then((tmp) {
+  Directory.systemTemp.createTemp('dart_file_system_exists').then((tmp) {
     var path = "${tmp.path}${Platform.pathSeparator}";
     var dir = new Directory("${path}myDir");
     var link = new Link("${path}myLink");
     return dir.create()
       .then((_) => link.create(dir.path))
 
       .then((_) => new File(link.path).exists().then(Expect.isFalse))
       .then((_) => new Directory(link.path).exists().then(Expect.isTrue))
       .then((_) => new Link(link.path).exists().then(Expect.isTrue))
 
       .then((_) => link.delete())
       .then((_) => dir.delete())
       .then((_) => tmp.delete());
   });
 }
 
 void testBrokenLinkExistsSync() {
-  var tmp = new Directory("").createTempSync();
+  var tmp = Directory.systemTemp.createTempSync('dart_file_system_exists');
   var path = "${tmp.path}${Platform.pathSeparator}";
 
   var directory = new Directory("${path}myDirectory");
   directory.createSync();
 
   var link = new Link("${path}myLink");
   link.createSync(directory.path);
   directory.deleteSync();
 
   Expect.isFalse(new File(link.path).existsSync());
   Expect.isFalse(new Directory(link.path).existsSync());
   Expect.isTrue(new Link(link.path).existsSync());
 
   link.deleteSync();
   Expect.isFalse(link.existsSync());
 
   tmp.deleteSync();
 }
 
 void testBrokenLinkExists() {
-  new Directory("").createTemp().then((tmp) {
+  Directory.systemTemp.createTemp('dart_file_system_exists').then((tmp) {
     var path = "${tmp.path}${Platform.pathSeparator}";
     var dir = new Directory("${path}myDir");
     var link = new Link("${path}myLink");
     return dir.create()
       .then((_) => link.create(dir.path))
       .then((_) => dir.delete())
 
       .then((_) => new File(link.path).exists().then(Expect.isFalse))
       .then((_) => new Directory(link.path).exists().then(Expect.isFalse))
       .then((_) => new Link(link.path).exists().then(Expect.isTrue))
@@ skipping 11 matching lines @@
   if (Platform.operatingSystem != 'windows') {
     testFileLinkExistsSync();
     testFileLinkExists();
   }
   testDirectoryLinkExistsSync();
   testDirectoryLinkExists();
   testBrokenLinkExistsSync();
   testBrokenLinkExists();
 }