Add File.renameSync() to virtual file system.

pkg/analyzer/test/file_system/physical_resource_provider_test.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.test.file_system.physical_resource_provider_test;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
@@ skipping 114 matching lines @@
       file.readAsStringSync();
     }, throwsA(_isFileSystemException));
   }
 
   void test_readAsStringSync_exists() {
     new io.File(path).writeAsStringSync('abc');
     File file = PhysicalResourceProvider.INSTANCE.getResource(path);
     expect(file.readAsStringSync(), 'abc');
   }
 
+  void test_renameSync_newDoesNotExist() {
+    String oldPath = '$tempPath/file.txt';
+    String newPath = '$tempPath/new-file.txt';
+    new io.File(oldPath).writeAsStringSync('text');
+    File file = PhysicalResourceProvider.INSTANCE.getResource(oldPath);
+    File newFile = file.renameSync(newPath);
+    expect(file.path, oldPath);
+    expect(file.exists, isFalse);
+    expect(newFile.path, newPath);
+    expect(newFile.exists, isTrue);
+    expect(newFile.readAsStringSync(), 'text');
+  }
+
+  void test_renameSync_newExists_file() {
+    String oldPath = '$tempPath/file.txt';
+    String newPath = '$tempPath/new-file.txt';
+    new io.File(oldPath).writeAsStringSync('text');
+    new io.File(newPath).writeAsStringSync('new text');
+    File file = PhysicalResourceProvider.INSTANCE.getResource(oldPath);
+    File newFile = file.renameSync(newPath);
+    expect(file.path, oldPath);
+    expect(file.exists, isFalse);
+    expect(newFile.path, newPath);
+    expect(newFile.exists, isTrue);
+    expect(newFile.readAsStringSync(), 'text');
+  }
+
+  void test_renameSync_newExists_folder() {
+    String oldPath = '$tempPath/file.txt';
+    String newPath = '$tempPath/foo';
+    new io.File(oldPath).writeAsStringSync('text');
+    new io.Directory(newPath).createSync();
+    File file = PhysicalResourceProvider.INSTANCE.getResource(oldPath);
+    expect(() {
+      file.renameSync(newPath);
+    }, throwsA(_isFileSystemException));
+    expect(file.path, oldPath);
+    expect(file.exists, isTrue);
+  }
+
   void test_shortName() {
     expect(file.shortName, 'file.txt');
   }
 
   void test_toString() {
     expect(file.toString(), path);
   }
 
   void test_writeAsBytesSync() {
     new io.File(path).writeAsBytesSync(<int>[1, 2]);
@@ skipping 321 matching lines @@
 
   setUp() {
     tempDirectory = io.Directory.systemTemp.createTempSync('test_resource');
     tempPath = tempDirectory.absolute.path;
   }
 
   tearDown() {
     tempDirectory.deleteSync(recursive: true);
   }
 }