adds file path source to pub

utils/tests/pub/test_pub.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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:io';
 import 'dart:json' as json;
 import 'dart:math';
 import 'dart:uri';
 
 import '../../../pkg/oauth2/lib/oauth2.dart' as oauth2;
 import '../../../pkg/path/lib/path.dart' as path;
 import '../../../pkg/unittest/lib/unittest.dart';
 import '../../../pkg/http/lib/testing.dart';
 import '../../lib/file_system.dart' as fs;
 import '../../pub/entrypoint.dart';
 import '../../pub/git_source.dart';
 import '../../pub/hosted_source.dart';
+import '../../pub/path_source.dart';
 import '../../pub/http.dart';
 import '../../pub/io.dart';
 import '../../pub/sdk_source.dart';
 import '../../pub/system_cache.dart';
 import '../../pub/utils.dart';
 import '../../pub/validator.dart';
 import '../../pub/yaml/yaml.dart';
 
 /// Creates a new [FileDescriptor] with [name] and [contents].
 FileDescriptor file(Pattern name, String contents) =>
@@ skipping 336 matching lines @@
       switch (sourceName) {
       case "git":
         source = new GitSource();
         break;
       case "hosted":
         source = new HostedSource();
         break;
       case "sdk":
         source = new SdkSource('');
         break;
+      case "path":
+        source = new PathSource();
+        break;
       default:
         throw 'Unknown source "$sourceName"';
       }
 
       result[_packageName(sourceName, dependency[sourceName])] = dependency;
     }
     return result;
   });
 }
 
@@ skipping 1148 matching lines @@
 /// calling [completion] is unnecessary.
 void expectLater(Future actual, matcher, {String reason,
     FailureHandler failureHandler, bool verbose: false}) {
   _schedule((_) {
     return actual.then((value) {
       expect(value, matcher, reason: reason, failureHandler: failureHandler,
           verbose: false);
     });
   });
 }