Add more tests

lib/src/packages_impl.dart

 // Copyright (c) 2015, 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 package_config.packages_impl;
 
 import "dart:collection" show UnmodifiableMapView;
 import "dart:io" show Directory;
 import "package:path/path.dart" as path;
 import "../packages.dart";
@@ skipping 52 matching lines @@
 
   Map<String, Uri> asMap() => new UnmodifiableMapView<String, Uri>(_mapping);
 }
 
 /// A [Packages] implementation based on a local directory.
 class FilePackagesDirectoryPackages extends _PackagesBase {
   final Directory _packageDir;
   FilePackagesDirectoryPackages(this._packageDir);
 
   Uri _getBase(String packageName) =>
-      new Uri.directory(path.join(packageName,''));
+      new Uri.directory(path.join(_packageDir.path, packageName, ''));

[Lasse Reichstein Nielsen, 2015/05/26 07:14:59]

Tests found bug! Yey!

 
   Iterable<String> _listPackageNames() {
     return _packageDir.listSync()
                       .where((e) => e is Directory)
                       .map((e) => path.basename(e.path));
   }
 
   Iterable<String> get packages {
     return _listPackageNames();
   }
@@ skipping 25 matching lines @@
   }
 
   Iterable<String> get packages {
     throw _failListingPackages();
   }
 
   Map<String, Uri> asMap() {
     throw _failListingPackages();
   }
 }