Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/barback/directory_args_test.dart

-// Copyright (c) 2014, 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 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-import '../serve/utils.dart';
-
-main() {
-  initConfig();
-
-  setUp(() {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('bar', [d.file('file.txt', 'bar')]),
-      d.dir('foo', [d.file('file.txt', 'foo')]),
-      d.dir('test', [d.file('file.txt', 'test')]),
-      d.dir('web', [d.file('file.txt', 'web')])
-    ]).create();
-  });
-
-  integration("builds only the given directories", () {
-    schedulePub(args: ["build", "foo", "bar"],
-        output: new RegExp(r'Built 2 files to "build".'));
-
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('bar', [
-          d.file('file.txt', 'bar')
-        ]),
-        d.dir('foo', [
-          d.file('file.txt', 'foo')
-        ]),
-        d.nothing('test'),
-        d.nothing('web')
-      ])
-    ]).validate();
-  });
-
-  integration("serves only the given directories", () {
-    pubServe(args: ["foo", "bar"]);
-
-    requestShouldSucceed("file.txt", "bar", root: "bar");
-    requestShouldSucceed("file.txt", "foo", root: "foo");
-    expectNotServed("test");
-    expectNotServed("web");
-
-    endPubServe();
-  });
-}