locating runtime files automatically (fixes #96)

test/dependency_graph_test.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 dev_compiler.test.dependency_graph_test;
 
 import 'package:unittest/unittest.dart';
 
 import 'package:dev_compiler/src/checker/dart_sdk.dart'
     show mockSdkSources, dartSdkDirectory;
 import 'package:dev_compiler/src/testing.dart';
 import 'package:dev_compiler/src/options.dart';
 import 'package:dev_compiler/src/checker/resolver.dart';
 import 'package:dev_compiler/src/dependency_graph.dart';
 import 'package:dev_compiler/src/report.dart';
 import 'package:path/path.dart' as path;
 
 import 'test_util.dart';
 
 void main() {
   configureTest();
 
-  var options = new CompilerOptions();
+  var options = new CompilerOptions(runtimeDir: '/dev_compiler_runtime/');
   var testUriResolver;
   var context;
   var graph;
 
   /// Initial values for test files
   var testFiles = {
     '/index1.html': '''
         <script src="foo.js"></script>
         ''',
     '/index2.html': '''
@@ skipping 625 matching lines @@
           |    |-- a6.dart (part)
           |-- harmony_feature_check.js
           |-- dart_runtime.js
           |-- dart_core.js
           ''');
     });
   });
 
   group('server-mode', () {
     setUp(() {
-      var options2 = new CompilerOptions(serverMode: true);
+      var options2 = new CompilerOptions(
+          runtimeDir: '/dev_compiler_runtime/', serverMode: true);
       context = new TypeResolver.fromMock(mockSdkSources, options2,
           otherResolvers: [testUriResolver]).context;
       graph = new SourceGraph(context, new LogReporter(), options2);
     });
 
     test('messages widget is automatically included', () {
       var node = nodeOf('/index3.html');
       expectGraph(node, '''
           index3.html
           |-- harmony_feature_check.js
@@ skipping 554 matching lines @@
           ..write(e.structureChanged ? '[structure-changed] ' : ' ')
           ..write('\n');
       });
     }
   }
   helper(node);
   return sb.toString();
 }
 
 bool _same(Set a, Set b) => a.length == b.length && a.containsAll(b);