dart:io | Add FileSystemEntity.parent, make File.directory call it.

tests/standalone/io/parent_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.
+//
+// Dart test program for testing file I/O.
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:collection';
+import 'dart:io';
+
+import "package:async_helper/async_helper.dart";
+import "package:expect/expect.dart";
+import "package:path/path.dart";
+
+String tempDirectory;
+
+void main() {
+  if (Platform.isWindows) {
+    testWindowsCases();
+  } else {
+    testPosixCases();
+  }
+  asyncStart();
+  createTempDirectories()
+    .then(testObjects)
+    .whenComplete(() {
+      asyncEnd();
+      new Directory(tempDirectory).delete(recursive: true);
+    });
+}
+
+testPosixCases() {
+  Expect.equals('/dir', FileSystemEntity.parentOf('/dir/file'));
+  Expect.equals('/dir', FileSystemEntity.parentOf('/dir/file/'));
+  Expect.equals('/dir', FileSystemEntity.parentOf('/dir//file//'));
+  Expect.equals('/', FileSystemEntity.parentOf('/dir'));
+  Expect.equals('/', FileSystemEntity.parentOf('/dir///'));
+  Expect.equals('/', FileSystemEntity.parentOf('/'));
+
+  Expect.equals('.', FileSystemEntity.parentOf('file'));
+  Expect.equals('.', FileSystemEntity.parentOf('file//'));
+  Expect.equals('.', FileSystemEntity.parentOf(''));
+  Expect.equals('.', FileSystemEntity.parentOf('..'));
+  Expect.equals('.', FileSystemEntity.parentOf('.'));
+  Expect.equals('.', FileSystemEntity.parentOf(''));
+  Expect.equals('/', FileSystemEntity.parentOf('/'));
+  Expect.equals('/', FileSystemEntity.parentOf('//'));
+  Expect.equals('/', FileSystemEntity.parentOf('//file///'));
+  Expect.equals('dir', FileSystemEntity.parentOf('dir/file'));
+  Expect.equals('dir', FileSystemEntity.parentOf('dir/file/'));
+  Expect.equals('dir', FileSystemEntity.parentOf('dir/file//'));
+  Expect.equals('dir/subdir', FileSystemEntity.parentOf('dir/subdir/file'));
+  Expect.equals('dir//subdir', FileSystemEntity.parentOf('dir//subdir//file/'));
+  Expect.equals('dir/sub.dir',
+                FileSystemEntity.parentOf('dir/sub.dir/fi le///'));
+  Expect.equals('dir/..', FileSystemEntity.parentOf('dir/../file/'));
+  Expect.equals('dir/..', FileSystemEntity.parentOf('dir/../..'));
+  Expect.equals('.', FileSystemEntity.parentOf('./..'));
+  Expect.equals('..', FileSystemEntity.parentOf('../.'));
+}
+
+testWindowsCases() {
+  Expect.equals(r'C:/dir', FileSystemEntity.parentOf(r'C:/dir/file'));
+  Expect.equals(r'C:/dir', FileSystemEntity.parentOf(r'C:/dir/file/'));
+  Expect.equals(r'C:\dir', FileSystemEntity.parentOf(r'C:\dir\file'));
+  Expect.equals(r'C:\dir', FileSystemEntity.parentOf(r'C:\dir\file\'));
+  Expect.equals(r'C:\dir', FileSystemEntity.parentOf(r'C:\dir\\file\\'));
+  Expect.equals(r'C:\', FileSystemEntity.parentOf(r'C:\dir'));
+  Expect.equals(r'C:\', FileSystemEntity.parentOf(r'C:\dir\/\'));
+  Expect.equals(r'C:\', FileSystemEntity.parentOf(r'C:\'));
+  // FileSystemEntity.isAbsolute returns false for 'C:'.
+  Expect.equals(r'.', FileSystemEntity.parentOf(r'C:'));
+
+  Expect.equals(r'\\server\share\dir',
+                FileSystemEntity.parentOf(r'\\server\share\dir\file'));
+  Expect.equals(r'\\server\share\dir',
+                FileSystemEntity.parentOf(r'\\server\share\dir\file\'));
+  Expect.equals(r'\\server\share',
+                FileSystemEntity.parentOf(r'\\server\share\file'));
+  Expect.equals(r'\\server\',
+                FileSystemEntity.parentOf(r'\\server\share'));
+  Expect.equals(r'\\server\',
+                FileSystemEntity.parentOf(r'\\server\share\'));
+  Expect.equals(r'\\server\',
+                FileSystemEntity.parentOf(r'\\server\'));
+  Expect.equals(r'\\server/',
+                FileSystemEntity.parentOf(r'\\server/'));
+  Expect.equals(r'\\serve',
+                FileSystemEntity.parentOf(r'\\serve'));
+
+  Expect.equals(r'.', FileSystemEntity.parentOf(r'file'));
+  Expect.equals(r'.', FileSystemEntity.parentOf(r''));
+  Expect.equals(r'.', FileSystemEntity.parentOf(r'..'));
+  Expect.equals(r'.', FileSystemEntity.parentOf(r'.'));
+  Expect.equals(r'.', FileSystemEntity.parentOf(r''));
+  Expect.equals(r'/', FileSystemEntity.parentOf(r'/'));
+  Expect.equals(r'\', FileSystemEntity.parentOf(r'\'));
+  Expect.equals(r'\', FileSystemEntity.parentOf(r'\file\\/'));
+  Expect.equals(r'dir', FileSystemEntity.parentOf(r'dir\file'));
+  Expect.equals(r'dir', FileSystemEntity.parentOf(r'dir\file\'));
+  Expect.equals(r'dir', FileSystemEntity.parentOf(r'dir/file/'));
+  Expect.equals(r'dir\subdir', FileSystemEntity.parentOf(r'dir\subdir\file'));
+  Expect.equals(r'dir\sub.dir',
+                FileSystemEntity.parentOf(r'dir\sub.dir\fi le'));
+}
+
+Future createTempDirectories() {
+  return Directory.systemTemp.createTemp('dart_parent_').then((dir) {
+    tempDirectory = dir.path;
+  }).then((_) => new File(join(tempDirectory, 'file1')).create())
+  .then((_) => new Link(join(tempDirectory, 'link1')).create('.'))
+  .then((_) => new Directory(join(tempDirectory, 'dir1')).create());
+}
+
+testObjects(var ignored) {
+  ['file1', 'link1', 'dir1', 'file2', 'link2', 'dir2'].map(testPath);
+}
+
+testPath(String path) {
+  Expect.equals(tempDirectory,
+                new File(join(tempDirectory, path)).parent.path);
+  Expect.equals(tempDirectory,
+                new Link(join(tempDirectory, path)).parent.path);
+  Expect.equals(tempDirectory,
+                new Directory(join(tempDirectory, path)).parent.path);
+}