Get rid of RootSource.

utils/tests/pub/version_solver_test.dart

 // Copyright (c) 2012, 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_update_test;
 
 import 'dart:async';
 import 'dart:io';
 
 import '../../pub/lock_file.dart';
 import '../../pub/package.dart';
 import '../../pub/pubspec.dart';
-import '../../pub/root_source.dart';
 import '../../pub/source.dart';
 import '../../pub/source_registry.dart';
 import '../../pub/system_cache.dart';
 import '../../pub/utils.dart';
 import '../../pub/version.dart';
 import '../../pub/version_solver.dart';
 import '../../../pkg/unittest/lib/unittest.dart';
 
 Matcher noVersion(List<String> packages) {
   return predicate((x) {
@@ skipping 38 matching lines @@
     if (!x.toString().contains(package1)) return false;
     if (!x.toString().contains(package2)) return false;
 
     return true;
   }, "is a SourceMismatchException");
 }
 
 MockSource source1;
 MockSource source2;
 Source versionlessSource;
-Source rootSource;
 
 main() {
   testResolve('no dependencies', {
     'myapp 0.0.0': {}
   }, result: {
     'myapp from root': '0.0.0'
   });
 
   testResolve('simple dependency tree', {
     'myapp 0.0.0': {
@@ skipping 315 matching lines @@
       var parts = nameVersion.split(' ');
       var name = parts[0];
       var version = parts[1];
 
       var package = source1.mockPackage(name, version, dependencies);
       if (name == 'myapp') {
         // Don't add the root package to the server, so we can verify that Pub
         // doesn't try to look up information about the local package on the
         // remote server.
         root = package;
-        rootSource = new RootSource(root);
-        cache.register(rootSource);
       } else {
         source.addPackage(package);
       }
     });
 
     // Clean up the expectation.
     if (result != null) {
       var newResult = {};
       result.forEach((name, version) {
         var parsed = parseSource(name);
@@ skipping 118 matching lines @@
 
   return completer.future;
 }
 
 Pair<String, Source> parseSource(String name) {
   var match = new RegExp(r"(.*) from (.*)").firstMatch(name);
   if (match == null) return new Pair<String, Source>(name, source1);
   switch (match[2]) {
   case 'mock1': return new Pair<String, Source>(match[1], source1);
   case 'mock2': return new Pair<String, Source>(match[1], source2);
-  case 'root': return new Pair<String, Source>(match[1], rootSource);
+  case 'root': return new Pair<String, Source>(match[1], null);
   case 'versionless':
     return new Pair<String, Source>(match[1], versionlessSource);
   }
 }