Fix ALL the pub tests.

utils/tests/pub/pub_uploader_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_uploader_test;
 
 import 'dart:io';
 import 'dart:json' as json;
 
 import 'test_pub.dart';
@@ skipping 56 matching lines @@
   });
 
   test('removes an uploader', () {
     var server = new ScheduledServer();
     credentialsFile(server, 'access token').scheduleCreate();
     var pub = startPubUploader(server, ['--package', 'pkg', 'remove', 'email']);
 
     server.handle('DELETE', '/packages/pkg/uploaders/email.json',
         (request, response) {
       response.headers.contentType = new ContentType("application", "json");
-      response.outputStream.writeString(JSON.stringify({
+      response.outputStream.writeString(json.stringify({
         'success': {'message': 'Good job!'}
       }));
       response.outputStream.close();
     });
 
     expectLater(pub.nextLine(), equals('Good job!'));
     pub.shouldExit(0);
 
     run();
   });
 
   test('defaults to the current package', () {
     normalPackage.scheduleCreate();
 
     var server = new ScheduledServer();
     credentialsFile(server, 'access token').scheduleCreate();
     var pub = startPubUploader(server, ['add', 'email']);
 
     server.handle('POST', '/packages/test_pkg/uploaders.json',
         (request, response) {
       response.headers.contentType = new ContentType("application", "json");
-      response.outputStream.writeString(JSON.stringify({
+      response.outputStream.writeString(json.stringify({
         'success': {'message': 'Good job!'}
       }));
       response.outputStream.close();
     });
 
     expectLater(pub.nextLine(), equals('Good job!'));
     pub.shouldExit(0);
 
     run();
   });
 
   test('add provides an error', () {
     var server = new ScheduledServer();
     credentialsFile(server, 'access token').scheduleCreate();
     var pub = startPubUploader(server, ['--package', 'pkg', 'add', 'email']);
 
     server.handle('POST', '/packages/pkg/uploaders.json', (request, response) {
       response.statusCode = 400;
       response.headers.contentType = new ContentType("application", "json");
-      response.outputStream.writeString(JSON.stringify({
+      response.outputStream.writeString(json.stringify({
         'error': {'message': 'Bad job!'}
       }));
       response.outputStream.close();
     });
 
     expectLater(pub.nextErrLine(), equals('Bad job!'));
     pub.shouldExit(1);
 
     run();
   });
 
   test('remove provides an error', () {
     var server = new ScheduledServer();
     credentialsFile(server, 'access token').scheduleCreate();
     var pub = startPubUploader(server,
         ['--package', 'pkg', 'remove', 'e/mail']);
 
     server.handle('DELETE', '/packages/pkg/uploaders/e%2Fmail.json',
         (request, response) {
       response.statusCode = 400;
       response.headers.contentType = new ContentType("application", "json");
-      response.outputStream.writeString(JSON.stringify({
+      response.outputStream.writeString(json.stringify({
         'error': {'message': 'Bad job!'}
       }));
       response.outputStream.close();
     });
 
     expectLater(pub.nextErrLine(), equals('Bad job!'));
     pub.shouldExit(1);
 
     run();
   });
@@ skipping 26 matching lines @@
       response.outputStream.close();
     });
 
     expectLater(pub.nextErrLine(), equals('Invalid server response:'));
     expectLater(pub.nextErrLine(), equals('{not json'));
     pub.shouldExit(1);
 
     run();
   });
 }