dart:io | Add 'recursive' flag to File.create and Link.create.

tests/standalone/io/create_recursive_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:io';
+
+import "package:async_helper/async_helper.dart";
+import "package:expect/expect.dart";
+import "package:path/path.dart";
+
+main() {
+  testCreateDirectoryRecursiveSync();
+  testCreateLinkRecursiveSync();
+  testCreateFileRecursiveSync();
+  testCreateDirectoryRecursive();
+  testCreateLinkRecursive();
+  testCreateFileRecursive();
+}
+
+testCreateDirectoryRecursiveSync() {
+  var temp = Directory.systemTemp.createTempSync('directory_test');
+  try {
+    var dir = new Directory(join(temp.path, 'a', 'b', 'c'));
+    Expect.throws(() => dir.createSync());
+    dir.createSync(recursive: true);
+    Expect.isTrue(dir.existsSync());
+    // Test cases where the directory or parent directory already exists.
+    dir.deleteSync();
+    dir.createSync(recursive: true);
+    Expect.isTrue(dir.existsSync());
+    dir.createSync(recursive: true);
+    Expect.isTrue(dir.existsSync());
+  } finally {
+    temp.deleteSync(recursive: true);
+  }
+}
+
+testCreateFileRecursiveSync() {
+  var temp = Directory.systemTemp.createTempSync('directory_test');
+  try {
+    var file = new File(join(temp.path, 'a', 'b', 'c'));
+    Expect.throws(() => file.createSync());
+    file.createSync(recursive: true);
+    Expect.isTrue(file.existsSync());
+    // Test cases where the file or parent directory already exists.
+    file.deleteSync();
+    file.createSync(recursive: true);
+    Expect.isTrue(file.existsSync());
+    file.createSync(recursive: true);
+    Expect.isTrue(file.existsSync());
+  } finally {
+    temp.deleteSync(recursive: true);
+  }
+}
+
+testCreateLinkRecursiveSync() {
+  var temp = Directory.systemTemp.createTempSync('directory_test');
+  try {
+    var link = new Link(join(temp.path, 'a', 'b', 'c'));
+    Expect.throws(() => link.createSync(temp.path));
+    link.createSync(temp.path, recursive: true);
+    Expect.isTrue(link.existsSync());
+    Expect.isTrue(new Directory(link.targetSync()).existsSync());
+    // Test cases where the link or parent directory already exists.
+    link.deleteSync();
+    link.createSync(temp.path, recursive: true);
+    Expect.isTrue(link.existsSync());
+    Expect.throws(() => link.createSync(temp.path, recursive: true));
+    Expect.isTrue(link.existsSync());
+  } finally {
+    temp.deleteSync(recursive: true);
+  }
+}
+
+Future expectFutureIsTrue(Future future) =>
+    future.then((value) => Expect.isTrue(value));
+
+Future expectFileSystemException(Function f, String message) {
+  return f().then(
+    (_) => Expect.fail('Expected a FileSystemException: $message'),
+    onError: (e) => Expect.isTrue(e is FileSystemException));
+}
+
+testCreateDirectoryRecursive() {
+  asyncStart();
+  Directory.systemTemp.createTemp('dart_directory').then((temp) {
+    var dir = new Directory(join(temp.path, 'a', 'b', 'c'));
+    return expectFileSystemException(() => dir.create(), 'dir.create')
+      .then((_) => dir.create(recursive: true))
+      .then((_) => expectFutureIsTrue(dir.exists()))
+      // Test cases where the directory or parent directory already exists.
+      .then((_) => dir.delete())
+      .then((_) => dir.create(recursive: true))
+      .then((_) => expectFutureIsTrue(dir.exists()))
+      .then((_) => dir.create(recursive: true))
+      .then((_) => expectFutureIsTrue(dir.exists()))
+
+      .then((_) => asyncEnd())
+      .whenComplete(() => temp.delete(recursive: true));
+  });
+}
+
+testCreateFileRecursive() {
+  asyncStart();
+  Directory.systemTemp.createTemp('dart_directory').then((temp) {
+    var file = new File(join(temp.path, 'a', 'b', 'c'));
+    return expectFileSystemException(() => file.create(), 'file.create')
+      .then((_) => file.create(recursive: true))
+      .then((_) => expectFutureIsTrue(file.exists()))
+      // Test cases where the file or parent directory already exists.
+      .then((_) => file.delete())
+      .then((_) => file.create(recursive: true))
+      .then((_) => expectFutureIsTrue(file.exists()))
+      .then((_) => file.create(recursive: true))
+      .then((_) => expectFutureIsTrue(file.exists()))
+
+      .then((_) => asyncEnd())
+      .whenComplete(() => temp.delete(recursive: true));
+    });
+}
+
+testCreateLinkRecursive() {
+  asyncStart();
+  Directory.systemTemp.createTemp('dart_directory').then((temp) {
+    var link = new Link(join(temp.path, 'a', 'b', 'c'));
+    return expectFileSystemException(() => link.create(temp.path),
+                                     'link.create')
+        .then((_) => link.create(temp.path, recursive: true))

[Anders Johnsen, 2013/10/30 16:19:13]

indentation

+      .then((_) => expectFutureIsTrue(link.exists()))
+      // Test cases where the link or parent directory already exists.
+      .then((_) => link.delete())
+      .then((_) => link.create(temp.path, recursive: true))
+      .then((_) => expectFutureIsTrue(link.exists()))
+      .then((_) => expectFileSystemException(
+                       () => link.create(temp.path, recursive: true),

[Anders Johnsen, 2013/10/30 16:19:13]

indentation

[Bill Hesse, 2013/10/30 16:51:40]

This was intentional. An indentation over 4 spaces that lines things up is OK. 
And this is 4 spaces more than the expression that is the target of a =>.  But I
changed it to a more standard one.

+                       'existing link.create'))
+      .then((_) => expectFutureIsTrue(link.exists()))
+
+      .then((_) => asyncEnd())

[Anders Johnsen, 2013/10/30 16:19:13]

asyncEnd should be part of whenComplete (likewise in the other async tests).

+      .whenComplete(() => temp.delete(recursive: true));
+  });
+}