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

sdk/lib/_internal/pub_generated/test/descriptor.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.
-
-/// Pub-specific scheduled_test descriptors.
-library descriptor;
-
-import 'package:oauth2/oauth2.dart' as oauth2;
-import 'package:scheduled_test/scheduled_server.dart';
-import 'package:scheduled_test/descriptor.dart';
-
-import '../lib/src/io.dart';
-import '../lib/src/utils.dart';
-import 'descriptor/git.dart';
-import 'descriptor/tar.dart';
-import 'test_pub.dart';
-
-export 'package:scheduled_test/descriptor.dart';
-export 'descriptor/git.dart';
-export 'descriptor/tar.dart';
-
-/// Creates a new [GitRepoDescriptor] with [name] and [contents].
-GitRepoDescriptor git(String name, [Iterable<Descriptor> contents]) =>
-    new GitRepoDescriptor(name, contents == null ? <Descriptor>[] : contents);
-
-/// Creates a new [TarRepoDescriptor] with [name] and [contents].
-TarFileDescriptor tar(String name, [Iterable<Descriptor> contents]) =>
-    new TarFileDescriptor(name, contents == null ? <Descriptor>[] : contents);
-
-/// Describes a package that passes all validation.
-Descriptor get validPackage =>
-    dir(
-        appPath,
-        [
-            libPubspec("test_pkg", "1.0.0"),
-            file("LICENSE", "Eh, do what you want."),
-            dir("lib", [file("test_pkg.dart", "int i = 1;")])]);
-
-/// Returns a descriptor of a snapshot that can't be run by the current VM.
-///
-/// This snapshot was generated by the VM on r39611, the revision immediately
-/// before snapshot versioning was added.
-FileDescriptor outOfDateSnapshot(String name) =>
-    binaryFile(name, readBinaryFile(testAssetPath('out-of-date.snapshot')));
-
-/// Describes a file named `pubspec.yaml` with the given YAML-serialized
-/// [contents], which should be a serializable object.
-///
-/// [contents] may contain [Future]s that resolve to serializable objects,
-/// which may in turn contain [Future]s recursively.
-Descriptor pubspec(Map contents) {
-  return async(
-      awaitObject(
-          contents).then(
-              (resolvedContents) => file("pubspec.yaml", yaml(resolvedContents))));
-}
-
-/// Describes a file named `pubspec.yaml` for an application package with the
-/// given [dependencies].
-Descriptor appPubspec([Map dependencies]) {
-  var map = {
-    "name": "myapp"
-  };
-  if (dependencies != null) map["dependencies"] = dependencies;
-  return pubspec(map);
-}
-
-/// Describes a file named `pubspec.yaml` for a library package with the given
-/// [name], [version], and [deps]. If "sdk" is given, then it adds an SDK
-/// constraint on that version.
-Descriptor libPubspec(String name, String version, {Map deps, String sdk}) {
-  var map = packageMap(name, version, deps);
-  if (sdk != null) map["environment"] = {
-    "sdk": sdk
-  };
-  return pubspec(map);
-}
-
-/// Describes a directory named `lib` containing a single dart file named
-/// `<name>.dart` that contains a line of Dart code.
-Descriptor libDir(String name, [String code]) {
-  // Default to printing the name if no other code was given.
-  if (code == null) code = name;
-  return dir("lib", [file("$name.dart", 'main() => "$code";')]);
-}
-
-/// Describes a directory for a Git package. This directory is of the form
-/// found in the revision cache of the global package cache.
-Descriptor gitPackageRevisionCacheDir(String name, [int modifier]) {
-  var value = name;
-  if (modifier != null) value = "$name $modifier";
-  return pattern(
-      new RegExp("$name${r'-[a-f0-9]+'}"),
-      (dirName) => dir(dirName, [libDir(name, value)]));
-}
-
-/// Describes a directory for a Git package. This directory is of the form
-/// found in the repo cache of the global package cache.
-Descriptor gitPackageRepoCacheDir(String name) {
-  return pattern(
-      new RegExp("$name${r'-[a-f0-9]+'}"),
-      (dirName) =>
-          dir(dirName, [dir('hooks'), dir('info'), dir('objects'), dir('refs')]));
-}
-
-/// Describes the `packages/` directory containing all the given [packages],
-/// which should be name/version pairs. The packages will be validated against
-/// the format produced by the mock package server.
-///
-/// A package with a null version should not be downloaded.
-Descriptor packagesDir(Map<String, String> packages) {
-  var contents = <Descriptor>[];
-  packages.forEach((name, version) {
-    if (version == null) {
-      contents.add(nothing(name));
-    } else {
-      contents.add(
-          dir(name, [file("$name.dart", 'main() => "$name $version";')]));
-    }
-  });
-  return dir(packagesPath, contents);
-}
-
-/// Describes the global package cache directory containing all the given
-/// [packages], which should be name/version pairs. The packages will be
-/// validated against the format produced by the mock package server.
-///
-/// A package's value may also be a list of versions, in which case all
-/// versions are expected to be downloaded.
-///
-/// If [includePubspecs] is `true`, then pubspecs will be created for each
-/// package. Defaults to `false` so that the contents of pubspecs are not
-/// validated since they will often lack the dependencies section that the
-/// real pubspec being compared against has. You usually only need to pass
-/// `true` for this if you plan to call [create] on the resulting descriptor.
-Descriptor cacheDir(Map packages, {bool includePubspecs: false}) {
-  var contents = <Descriptor>[];
-  packages.forEach((name, versions) {
-    if (versions is! List) versions = [versions];
-    for (var version in versions) {
-      var packageContents = [libDir(name, '$name $version')];
-      if (includePubspecs) {
-        packageContents.add(libPubspec(name, version));
-      }
-      contents.add(dir("$name-$version", packageContents));
-    }
-  });
-
-  return hostedCache(contents);
-}
-
-/// Describes the main cache directory containing cached hosted packages
-/// downloaded from the mock package server.
-Descriptor hostedCache(Iterable<Descriptor> contents) {
-  return dir(
-      cachePath,
-      [dir('hosted', [async(port.then((p) => dir('localhost%58$p', contents)))])]);
-}
-
-/// Describes the file in the system cache that contains the client's OAuth2
-/// credentials. The URL "/token" on [server] will be used as the token
-/// endpoint for refreshing the access token.
-Descriptor credentialsFile(ScheduledServer server, String accessToken,
-    {String refreshToken, DateTime expiration}) {
-  return async(server.url.then((url) {
-    return dir(
-        cachePath,
-        [
-            file(
-                'credentials.json',
-                new oauth2.Credentials(
-                    accessToken,
-                    refreshToken,
-                    url.resolve('/token'),
-                    ['https://www.googleapis.com/auth/userinfo.email'],
-                    expiration).toJson())]);
-  }));
-}
-
-/// Describes the application directory, containing only a pubspec specifying
-/// the given [dependencies].
-DirectoryDescriptor appDir([Map dependencies]) =>
-    dir(appPath, [appPubspec(dependencies)]);