anchor.diff:    environment['_PUB_TEST_SDK_VERSION'] = "0.1.2+3";
   
     if (tokenEndpoint != null) {
  -    environment['_PUB_TEST_TOKEN_ENDPOINT'] =
  -      tokenEndpoint.toString();
  +    environment['_PUB_TEST_TOKEN_ENDPOINT'] = tokenEndpoint.toString();
     }
   
     return environment;
  
positive.code: /// interaction with that process.
  ///
  /// Any futures in [args] will be resolved before the process is started.
  ScheduledProcess startPub({List args, Future<Uri> tokenEndpoint}) {
    ensureDir(_pathInSandbox(appPath));
  
    // Find a Dart executable we can use to spawn. Use the same one that was
  
negative.code: }
  
  /// Gets the environment variables used to run pub in a test context.
  Map getPubTestEnvironment([String tokenEndpoint]) {
    var environment = {};
    environment['_PUB_TESTING'] = 'true';
    environment['PUB_CACHE'] = _pathInSandbox(cachePath);
  