Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/io_test.dart

 // Copyright (c) 2012, 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 io_test;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 import '../lib/src/io.dart';
 import 'test_pub.dart';
 
 main() {
   initConfig();
 
   group('listDir', () {
     test('ignores hidden files by default', () {
       expect(withTempDir((temp) {
         writeTextFile(path.join(temp, 'file1.txt'), '');
         writeTextFile(path.join(temp, 'file2.txt'), '');
         writeTextFile(path.join(temp, '.file3.txt'), '');
         createDir(path.join(temp, '.subdir'));
         writeTextFile(path.join(temp, '.subdir', 'file3.txt'), '');
 
-        expect(listDir(temp, recursive: true), unorderedEquals([
-          path.join(temp, 'file1.txt'),
-          path.join(temp, 'file2.txt')
-        ]));
+        expect(
+            listDir(temp, recursive: true),
+            unorderedEquals([path.join(temp, 'file1.txt'), path.join(temp, 'file2.txt')]));
       }), completes);
     });
 
     test('includes hidden files when told to', () {
       expect(withTempDir((temp) {
         writeTextFile(path.join(temp, 'file1.txt'), '');
         writeTextFile(path.join(temp, 'file2.txt'), '');
         writeTextFile(path.join(temp, '.file3.txt'), '');
         createDir(path.join(temp, '.subdir'));
         writeTextFile(path.join(temp, '.subdir', 'file3.txt'), '');
 
-        expect(listDir(temp, recursive: true, includeHidden: true),
-            unorderedEquals([
-          path.join(temp, 'file1.txt'),
-          path.join(temp, 'file2.txt'),
-          path.join(temp, '.file3.txt'),
-          path.join(temp, '.subdir'),
-          path.join(temp, '.subdir', 'file3.txt')
-        ]));
+        expect(
+            listDir(temp, recursive: true, includeHidden: true),
+            unorderedEquals(
+                [
+                    path.join(temp, 'file1.txt'),
+                    path.join(temp, 'file2.txt'),
+                    path.join(temp, '.file3.txt'),
+                    path.join(temp, '.subdir'),
+                    path.join(temp, '.subdir', 'file3.txt')]));
       }), completes);
     });
 
     test("doesn't ignore hidden files above the directory being listed", () {
       expect(withTempDir((temp) {
         var dir = path.join(temp, '.foo', 'bar');
         ensureDir(dir);
         writeTextFile(path.join(dir, 'file1.txt'), '');
         writeTextFile(path.join(dir, 'file2.txt'), '');
         writeTextFile(path.join(dir, 'file3.txt'), '');
 
-        expect(listDir(dir, recursive: true), unorderedEquals([
-          path.join(dir, 'file1.txt'),
-          path.join(dir, 'file2.txt'),
-          path.join(dir, 'file3.txt')
-        ]));
+        expect(
+            listDir(dir, recursive: true),
+            unorderedEquals(
+                [
+                    path.join(dir, 'file1.txt'),
+                    path.join(dir, 'file2.txt'),
+                    path.join(dir, 'file3.txt')]));
       }), completes);
     });
   });
 
   group('canonicalize', () {
     test('resolves a non-link', () {
       expect(withCanonicalTempDir((temp) {
         var filePath = path.join(temp, 'file');
         writeTextFile(filePath, '');
         expect(canonicalize(filePath), equals(filePath));
       }), completes);
     });
 
     test('resolves a non-existent file', () {
       expect(withCanonicalTempDir((temp) {
-        expect(canonicalize(path.join(temp, 'nothing')),
+        expect(
+            canonicalize(path.join(temp, 'nothing')),
             equals(path.join(temp, 'nothing')));
       }), completes);
     });
 
     test('resolves a symlink', () {
       expect(withCanonicalTempDir((temp) {
         createDir(path.join(temp, 'linked-dir'));
-        createSymlink(
-            path.join(temp, 'linked-dir'),
-            path.join(temp, 'dir'));
+        createSymlink(path.join(temp, 'linked-dir'), path.join(temp, 'dir'));
         expect(
             canonicalize(path.join(temp, 'dir')),
             equals(path.join(temp, 'linked-dir')));
       }), completes);
     });
 
     test('resolves a relative symlink', () {
       expect(withCanonicalTempDir((temp) {
         createDir(path.join(temp, 'linked-dir'));
         createSymlink(
@@ skipping 70 matching lines @@
       }), completes);
     });
 
     test('resolves a vertically recursive symlink', () {
       expect(withCanonicalTempDir((temp) {
         var dir = path.join(temp, 'dir');
         var subdir = path.join(dir, 'subdir');
         createDir(dir);
         createSymlink(dir, subdir);
         expect(
-            canonicalize(path.join(temp, 'dir', 'subdir', 'subdir', 'subdir',
-                                   'subdir', 'file')),
+            canonicalize(
+                path.join(temp, 'dir', 'subdir', 'subdir', 'subdir', 'subdir', 'file')),
             equals(path.join(dir, 'file')));
       }), completes);
     });
 
-    test('resolves a symlink that links to a path that needs more resolving',
+    test(
+        'resolves a symlink that links to a path that needs more resolving',
         () {
       expect(withCanonicalTempDir((temp) {
         var dir = path.join(temp, 'dir');
         var linkdir = path.join(temp, 'linkdir');
         var linkfile = path.join(dir, 'link');
         createDir(dir);
         createSymlink(dir, linkdir);
         createSymlink(path.join(linkdir, 'file'), linkfile);
-        expect(
-            canonicalize(linkfile),
-            equals(path.join(dir, 'file')));
+        expect(canonicalize(linkfile), equals(path.join(dir, 'file')));
       }), completes);
     });
 
     test('resolves a pair of pathologically-recursive symlinks', () {
       expect(withCanonicalTempDir((temp) {
         var foo = path.join(temp, 'foo');
         var subfoo = path.join(foo, 'subfoo');
         var bar = path.join(temp, 'bar');
         var subbar = path.join(bar, 'subbar');
         createSymlink(subbar, foo);
         createSymlink(subfoo, bar);
         expect(
             canonicalize(subfoo),
             equals(path.join(subfoo, 'subbar', 'subfoo')));
       }), completes);
     });
   });
 
-  testExistencePredicate("entryExists", entryExists,
+  testExistencePredicate(
+      "entryExists",
+      entryExists,
       forFile: true,
       forFileSymlink: true,
       forMultiLevelFileSymlink: true,
       forDirectory: true,
       forDirectorySymlink: true,
       forMultiLevelDirectorySymlink: true,
       forBrokenSymlink: true,
       forMultiLevelBrokenSymlink: true);
 
-  testExistencePredicate("linkExists", linkExists,
+  testExistencePredicate(
+      "linkExists",
+      linkExists,
       forFile: false,
       forFileSymlink: true,
       forMultiLevelFileSymlink: true,
       forDirectory: false,
       forDirectorySymlink: true,
       forMultiLevelDirectorySymlink: true,
       forBrokenSymlink: true,
       forMultiLevelBrokenSymlink: true);
 
-  testExistencePredicate("fileExists", fileExists,
+  testExistencePredicate(
+      "fileExists",
+      fileExists,
       forFile: true,
       forFileSymlink: true,
       forMultiLevelFileSymlink: true,
       forDirectory: false,
       forDirectorySymlink: false,
       forMultiLevelDirectorySymlink: false,
       forBrokenSymlink: false,
       forMultiLevelBrokenSymlink: false);
 
-  testExistencePredicate("dirExists", dirExists,
+  testExistencePredicate(
+      "dirExists",
+      dirExists,
       forFile: false,
       forFileSymlink: false,
       forMultiLevelFileSymlink: false,
       forDirectory: true,
       forDirectorySymlink: true,
       forMultiLevelDirectorySymlink: true,
       forBrokenSymlink: false,
       forMultiLevelBrokenSymlink: false);
 }
 
 void testExistencePredicate(String name, bool predicate(String path),
-    {bool forFile,
-     bool forFileSymlink,
-     bool forMultiLevelFileSymlink,
-     bool forDirectory,
-     bool forDirectorySymlink,
-     bool forMultiLevelDirectorySymlink,
-     bool forBrokenSymlink,
-     bool forMultiLevelBrokenSymlink}) {
+    {bool forFile, bool forFileSymlink, bool forMultiLevelFileSymlink,
+    bool forDirectory, bool forDirectorySymlink, bool forMultiLevelDirectorySymlink,
+    bool forBrokenSymlink, bool forMultiLevelBrokenSymlink}) {
   group(name, () {
     test('returns $forFile for a file', () {
       expect(withTempDir((temp) {
         var file = path.join(temp, "test.txt");
         writeTextFile(file, "contents");
         expect(predicate(file), equals(forFile));
       }), completes);
     });
 
     test('returns $forDirectory for a directory', () {
       expect(withTempDir((temp) {
         var file = path.join(temp, "dir");
         createDir(file);
         expect(predicate(file), equals(forDirectory));
       }), completes);
     });
 
     test('returns $forDirectorySymlink for a symlink to a directory', () {
       expect(withTempDir((temp) {
         var targetPath = path.join(temp, "dir");
         var symlinkPath = path.join(temp, "linkdir");
         createDir(targetPath);
         createSymlink(targetPath, symlinkPath);
         expect(predicate(symlinkPath), equals(forDirectorySymlink));
       }), completes);
     });
 
-    test('returns $forMultiLevelDirectorySymlink for a multi-level symlink to '
-        'a directory', () {
+    test(
+        'returns $forMultiLevelDirectorySymlink for a multi-level symlink to '
+            'a directory',
+        () {
       expect(withTempDir((temp) {
         var targetPath = path.join(temp, "dir");
         var symlink1Path = path.join(temp, "link1dir");
         var symlink2Path = path.join(temp, "link2dir");
         createDir(targetPath);
         createSymlink(targetPath, symlink1Path);
         createSymlink(symlink1Path, symlink2Path);
-        expect(predicate(symlink2Path),
-              equals(forMultiLevelDirectorySymlink));
+        expect(predicate(symlink2Path), equals(forMultiLevelDirectorySymlink));
       }), completes);
     });
 
     test('returns $forBrokenSymlink for a broken symlink', () {
       expect(withTempDir((temp) {
         var targetPath = path.join(temp, "dir");
         var symlinkPath = path.join(temp, "linkdir");
         createDir(targetPath);
         createSymlink(targetPath, symlinkPath);
         deleteEntry(targetPath);
         expect(predicate(symlinkPath), equals(forBrokenSymlink));
       }), completes);
     });
 
-    test('returns $forMultiLevelBrokenSymlink for a multi-level broken symlink',
+    test(
+        'returns $forMultiLevelBrokenSymlink for a multi-level broken symlink',
         () {
       expect(withTempDir((temp) {
         var targetPath = path.join(temp, "dir");
         var symlink1Path = path.join(temp, "link1dir");
         var symlink2Path = path.join(temp, "link2dir");
         createDir(targetPath);
         createSymlink(targetPath, symlink1Path);
         createSymlink(symlink1Path, symlink2Path);
         deleteEntry(targetPath);
         expect(predicate(symlink2Path), equals(forMultiLevelBrokenSymlink));
       }), completes);
     });
 
     // Windows doesn't support symlinking to files.
     if (Platform.operatingSystem != 'windows') {
       test('returns $forFileSymlink for a symlink to a file', () {
         expect(withTempDir((temp) {
           var targetPath = path.join(temp, "test.txt");
           var symlinkPath = path.join(temp, "link.txt");
           writeTextFile(targetPath, "contents");
           createSymlink(targetPath, symlinkPath);
           expect(predicate(symlinkPath), equals(forFileSymlink));
         }), completes);
       });
 
-      test('returns $forMultiLevelFileSymlink for a multi-level symlink to a '
-          'file', () {
+      test(
+          'returns $forMultiLevelFileSymlink for a multi-level symlink to a ' 'file',
+          () {
         expect(withTempDir((temp) {
           var targetPath = path.join(temp, "test.txt");
           var symlink1Path = path.join(temp, "link1.txt");
           var symlink2Path = path.join(temp, "link2.txt");
           writeTextFile(targetPath, "contents");
           createSymlink(targetPath, symlink1Path);
           createSymlink(symlink1Path, symlink2Path);
           expect(predicate(symlink2Path), equals(forMultiLevelFileSymlink));
         }), completes);
       });
     }
   });
 }
 
 /// Like [withTempDir], but canonicalizes the path before passing it to [fn].
 Future withCanonicalTempDir(Future fn(String path)) =>
-  withTempDir((temp) => fn(canonicalize(temp)));
+    withTempDir((temp) => fn(canonicalize(temp)));