Support directories other than "web" in pub build.

sdk/lib/_internal/pub/test/test_pub.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.
 
 /// Test infrastructure for testing pub. Unlike typical unit tests, most pub
 /// tests are integration tests that stage some stuff on the file system, run
 /// pub, and then validate the results. This library provides an API to build
 /// tests like that.
 library test_pub;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
 
 import 'package:http/testing.dart';
 import 'package:path/path.dart' as path;
 import 'package:scheduled_test/scheduled_process.dart';
 import 'package:scheduled_test/scheduled_server.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:unittest/compact_vm_config.dart';
 import 'package:yaml/yaml.dart';
 
 import '../lib/src/entrypoint.dart';
+import '../lib/src/exit_codes.dart' as exit_codes;
 // TODO(rnystrom): Using "gitlib" as the prefix here is ugly, but "git" collides
 // with the git descriptor method. Maybe we should try to clean up the top level
 // scope a bit?
 import '../lib/src/git.dart' as gitlib;
 import '../lib/src/http.dart';
 import '../lib/src/io.dart';
 import '../lib/src/lock_file.dart';
 import '../lib/src/log.dart' as log;
 import '../lib/src/package.dart';
 import '../lib/src/source/hosted.dart';
@@ skipping 340 matching lines @@
           path.join(sandboxDir, symlink)),
       'symlinking $target to $symlink');
 }
 
 /// Schedules a call to the Pub command-line utility.
 ///
 /// Runs Pub with [args] and validates that its results match [output] (or
 /// [outputJson]), [error], and [exitCode]. If [outputJson] is given, validates
 /// that pub outputs stringified JSON matching that object.
 void schedulePub({List args, Pattern output, Pattern error, outputJson,
-    Future<Uri> tokenEndpoint, int exitCode: 0}) {
+    Future<Uri> tokenEndpoint, int exitCode: exit_codes.SUCCESS}) {
   // Cannot pass both output and outputJson.
   assert(output == null || outputJson == null);
 
   var pub = startPub(args: args, tokenEndpoint: tokenEndpoint);
   pub.shouldExit(exitCode);
 
   var failures = [];
   var stderr;
 
   expect(Future.wait([
@@ skipping 462 matching lines @@
   bool matches(item, Map matchState) {
     if (item is! Pair) return false;
     return _firstMatcher.matches(item.first, matchState) &&
         _lastMatcher.matches(item.last, matchState);
   }
 
   Description describe(Description description) {
     description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
   }
 }