Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/snapshot/prints_errors_for_broken_snapshots_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.
-
-library pub_tests;
-
-import 'package:path/path.dart' as p;
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-  integration("prints errors for broken snapshot compilation", () {
-    servePackages((builder) {
-      builder.serve("foo", "1.2.3", contents: [
-        d.dir("bin", [
-          d.file("hello.dart", "void main() { no closing brace"),
-          d.file("goodbye.dart", "void main() { no closing brace"),
-        ])
-      ]);
-      builder.serve("bar", "1.2.3", contents: [
-        d.dir("bin", [
-          d.file("hello.dart", "void main() { no closing brace"),
-          d.file("goodbye.dart", "void main() { no closing brace"),
-        ])
-      ]);
-    });
-
-    d.appDir({"foo": "1.2.3", "bar": "1.2.3"}).create();
-
-    // This should still have a 0 exit code, since installation succeeded even
-    // if precompilation didn't.
-    pubGet(error: allOf([
-      contains("Failed to precompile foo:hello"),
-      contains("Failed to precompile foo:goodbye"),
-      contains("Failed to precompile bar:hello"),
-      contains("Failed to precompile bar:goodbye")
-    ]), exitCode: 0);
-
-    d.dir(p.join(appPath, '.pub', 'bin'), [
-      d.file('sdk-version', '0.1.2+3\n'),
-      d.dir('foo', [
-        d.nothing('hello.dart.snapshot'),
-        d.nothing('goodbye.dart.snapshot')
-      ]),
-      d.dir('bar', [
-        d.nothing('hello.dart.snapshot'),
-        d.nothing('goodbye.dart.snapshot')
-      ])
-    ]).validate();
-  });
-}