Modify tests to use Directory.systemTemp

tests/standalone/io/file_system_watcher_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";
 
 
 void testWatchCreateFile() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
 
   var watcher = dir.watch();
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event is FileSystemCreateEvent &&
         event.path.endsWith('file')) {
       asyncEnd();
       sub.cancel();
       dir.deleteSync(recursive: true);
     }
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.createSync();
 }
 
 
 void testWatchModifyFile() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
   file.createSync();
 
   var watcher = dir.watch();
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event is FileSystemModifyEvent) {
       Expect.isTrue(event.path.endsWith('file'));
       sub.cancel();
       asyncEnd();
       dir.deleteSync(recursive: true);
     }
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.writeAsStringSync('a');
 }
 
 
 void testWatchMoveFile() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
   file.createSync();
 
   var watcher = dir.watch();
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event is FileSystemMoveEvent) {
       Expect.isTrue(event.path.endsWith('file'));
       if (event.destination != null) {
         Expect.isTrue(event.destination.endsWith('file2'));
       }
       sub.cancel();
       asyncEnd();
       dir.deleteSync(recursive: true);
     }
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.renameSync(dir.path + '/file2');
 }
 
 
 void testWatchDeleteFile() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
   file.createSync();
 
   var watcher = dir.watch();
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event is FileSystemDeleteEvent) {
       Expect.isTrue(event.path.endsWith('file'));
       sub.cancel();
       asyncEnd();
       dir.deleteSync(recursive: true);
     }
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.deleteSync();
 }
 
 
 void testWatchOnlyModifyFile() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
 
   var watcher = dir.watch(events: FileSystemEvent.MODIFY);
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     Expect.isTrue(event is FileSystemModifyEvent);
     Expect.isTrue(event.path.endsWith('file'));
     sub.cancel();
     asyncEnd();
     dir.deleteSync(recursive: true);
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.createSync();
   file.writeAsStringSync('a');
 }
 
 
 void testMultipleEvents() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var file = new File(dir.path + '/file');
   var file2 = new File(dir.path + '/file2');
 
   var watcher = dir.watch();
 
   asyncStart();
   int state = 0;
   var sub;
   sub = watcher.listen((event) {
     int newState = 0;
@@ skipping 24 matching lines @@
   });
 
   file.createSync();
   file.writeAsStringSync('a');
   file.renameSync(file2.path);
   file2.deleteSync();
 }
 
 
 void testWatchRecursive() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   if (Platform.isLinux) {
     Expect.throws(() => dir.watch(recursive: true));
     return;
   }
   var dir2 = new Directory(dir.path + '/dir');
   dir2.createSync();
   var file = new File(dir.path + '/dir/file');
 
   var watcher = dir.watch(recursive: true);
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event.path.endsWith('file')) {
       sub.cancel();
       asyncEnd();
       dir.deleteSync(recursive: true);
     }
   }, onError: (e) {
     dir.deleteSync(recursive: true);
     throw e;
   });
 
   file.createSync();
 }
 
 
 void testWatchNonRecursive() {
-  var dir = new Directory('').createTempSync();
+  var dir = Directory.systemTemp.createTempSync('dart_file_system_watcher');
   var dir2 = new Directory(dir.path + '/dir');
   dir2.createSync();
   var file = new File(dir.path + '/dir/file');
 
   var watcher = dir.watch(recursive: false);
 
   asyncStart();
   var sub;
   sub = watcher.listen((event) {
     if (event.path.endsWith('file')) {
@@ skipping 17 matching lines @@
 void main() {
   if (!FileSystemEntity.isWatchSupported) return;
   testWatchCreateFile();
   testWatchModifyFile();
   testWatchMoveFile();
   testWatchDeleteFile();
   testWatchOnlyModifyFile();
   testMultipleEvents();
   testWatchNonRecursive();
 }