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// Copyright (c) 2020, 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.
//
// This test is Windows-only.
// @dart = 2.9
import 'dart:io';
import "package:expect/expect.dart";
const maxPath = 260;
const maxDirectoryPath = maxPath - 12;
String longName = '${'x' * 248}';
Directory createLongPathDir(Directory tmp) {
if (tmp.path.length <= maxDirectoryPath) {
var path = tmp.path;
path += '\\${'t' * 248}';
var dir = Directory(path);
dir.createSync(recursive: true);
// Test the rename() of directory
dir = dir.renameSync(tmp.path + '\\$longName');
Expect.isTrue(dir.existsSync());
Expect.isFalse(Directory(path).existsSync());
return dir;
} else {
return tmp;
}
}
void testCreate(String dir) {
final path = '${dir}\\a_long_path_filename';
Expect.isTrue(path.length > maxPath);
final file = File(path);
file.createSync();
Expect.isTrue(file.existsSync());
file.deleteSync();
}
void testCopy(String dir) {
final src = '${dir}\\a_long_path_filename_1';
final dest = '${dir}\\a_long_path_filename_2';
Expect.isTrue(src.length > maxPath);
final file1 = File(src);
file1.createSync();
final file2 = file1.copySync(dest);
Expect.isTrue(file2.existsSync());
file1.deleteSync();
file2.deleteSync();
}
void testRename(String dir) {
final path = '${dir}\\a_long_path_filename';
Expect.isTrue(path.length > maxPath);
final file = File(path);
file.createSync();
Expect.isTrue(file.existsSync());
final renamedFile = file.renameSync('${path}_copy');
Expect.isFalse(file.existsSync());
Expect.isTrue(renamedFile.existsSync());
renamedFile.deleteSync();
}
void testReadWrite(String dir) {
final path = '${dir}\\a_long_path_filename';
Expect.isTrue(path.length > maxPath);
final file = File(path);
final content = "testReadWrite";
file.writeAsStringSync(content);
Expect.isTrue(file.existsSync());
int length = file.lengthSync();
Expect.equals(content.length, length);
final string = file.readAsStringSync();
Expect.equals(content, string);
file.deleteSync();
}
void testOpen(String dir) {
final path = '${dir}\\a_long_path_filename';
Expect.isTrue(path.length > maxPath);
final file = File(path);
file.createSync();
final access = file.openSync();
access.closeSync();
}
void testFileStat(String dir) {
final path = '${dir}\\a_long_path_filename';
Expect.isTrue(path.length > maxPath);
final file = File(path);
file.createSync();
final stat = FileStat.statSync(file.path);
final dateTime = DateTime.utc(2020);
file.setLastModifiedSync(dateTime);
Expect.notEquals(
stat.modified.toString(), file.lastModifiedSync().toString());
file.setLastAccessedSync(dateTime);
Expect.notEquals(
stat.accessed.toString(), file.lastAccessedSync().toString());
}
void testCreateLinkToDir(String dir) {
final path = '${dir}\\a_long_path_linkname';
Expect.isTrue(path.length > maxPath);
var target = '$dir\\a_long_path_target';
final link = Link(path)..createSync(target);
final dest = Directory(target)..createSync();
Expect.isTrue(dest.existsSync());
Expect.isTrue(link.existsSync());
Expect.isTrue(link.targetSync().contains('a_long_path_target'));
// Rename link
var renamedLink = link.renameSync('${dir}\\a_renamed_long_path_link');
Expect.isTrue(renamedLink.existsSync());
Expect.isFalse(link.existsSync());
Expect.isTrue(renamedLink.targetSync().contains('a_long_path_target'));
// Update link target
target = '$dir\\an_updated_target';
final renamedDest = Directory(target)..createSync();
renamedLink.updateSync(target);
Expect.isTrue(renamedLink.targetSync().contains('an_updated_target'));
dest.deleteSync();
renamedDest.deleteSync();
renamedLink.deleteSync();
}
void testCreateLinkToFile(String dir) {
final path = '${dir}\\a_long_path_linkname';
Expect.isTrue(path.length > maxPath);
var target = '$dir\\a_long_path_target';
final link = Link(path)..createSync(target);
final dest = File(target)..createSync();
Expect.isTrue(dest.existsSync());
Expect.isTrue(link.existsSync());
Expect.isTrue(link.targetSync().contains('a_long_path_target'));
Expect.isTrue(link.resolveSymbolicLinksSync().contains('a_long_path_target'));
// Rename link
var renamedLink = link.renameSync('${dir}\\a_renamed_long_path_link');
Expect.isTrue(renamedLink.existsSync());
Expect.isFalse(link.existsSync());
Expect.isTrue(renamedLink.targetSync().contains('a_long_path_target'));
// Update link target
target = '$dir\\an_updated_target';
final renamedDest = File(target)..createSync();
renamedLink.updateSync(target);
Expect.isTrue(renamedLink.targetSync().contains('an_updated_target'));
dest.deleteSync();
renamedDest.deleteSync();
renamedLink.deleteSync();
}
testNormalLinkToLongPath(String short, String long) {
var target = File('$long\\file_target')..createSync();
final link = Link('$short\\link')..createSync(target.path);
Expect.isTrue(target.path.length > maxPath);
Expect.isTrue(link.resolveSymbolicLinksSync().length > maxPath);
Expect.isTrue(link.path.length < maxPath);
Expect.isTrue(link.resolveSymbolicLinksSync().contains('file_target'));
Expect.isTrue(link.existsSync());
Expect.equals(target.path, link.targetSync());
var targetDir = Directory('$long\\dir_target')..createSync();
link.updateSync(targetDir.path);
Expect.equals(targetDir.path, link.targetSync());
link.deleteSync();
target.deleteSync();
targetDir.deleteSync();
}
testLongPathLinkToNormal(String short, String long) {
var target = File('$short\\file_target')..createSync();
final link = Link('$long\\link')..createSync(target.path);
Expect.isTrue(target.path.length < maxPath);
Expect.isTrue(link.path.length > maxPath);
Expect.isTrue(link.resolveSymbolicLinksSync().contains('file_target'));
Expect.isTrue(link.existsSync());
Expect.equals(target.path, link.targetSync());
var targetDir = Directory('$short\\dir_target')..createSync();
link.updateSync(targetDir.path);
Expect.equals(targetDir.path, link.targetSync());
link.deleteSync();
target.deleteSync();
targetDir.deleteSync();
}
testDirectorySetCurrent(String dir) {
// This tests setting a long path directory to current directory.
// This will fail.
Expect.isTrue(dir.length > maxPath);
Expect.throws<FileSystemException>(() {
Directory.current = dir;
}, (e) => e.toString().contains('extension is too long'));
}
void main() {
if (!Platform.isWindows) {
return;
}
final tmp = Directory.systemTemp.createTempSync('dart-file-long-path');
final oldCurrent = Directory.current;
Directory.current = tmp;
try {
String dir = createLongPathDir(tmp).path;
testDirectorySetCurrent(dir);
for (final path in [dir, ".\\$longName", ".\\$longName\\..\\$longName"]) {
testCreate(path);
testCopy(path);
testRename(path);
testReadWrite(path);
testOpen(path);
testFileStat(path);
testCreateLinkToDir(path);
testCreateLinkToFile(path);
}
testNormalLinkToLongPath(tmp.path, dir);
testLongPathLinkToNormal(tmp.path, dir);
} finally {
// Reset the current Directory.
Directory.current = oldCurrent;
tmp.deleteSync(recursive: true);
}
}