Switch 'analyzer' to 'package:test' and test_reflective_loader ^0.1.0.

pkg/analyzer/test/src/task/yaml_test.dart

 // Copyright (c) 2016, 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 analyzer.test.src.task.yaml_test;
 
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/yaml.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/yaml.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 import 'package:yaml/yaml.dart';
 
 import '../../utils.dart';
 import '../context/abstract_context.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(ParseYamlTaskTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(ParseYamlTaskTest);
+  });
 }
 
 isInstanceOf isParseYamlTask = new isInstanceOf<ParseYamlTask>();
 
 @reflectiveTest
 class ParseYamlTaskTest extends AbstractContextTest {
   Source source;
 
   test_perform() {
     _performParseTask(r'''
@@ skipping 30 matching lines @@
 
   void _performParseTask(String content) {
     if (content == null) {
       source = resourceProvider.getFile('/test.yaml').createSource();
     } else {
       source = newSource('/test.yaml', content);
     }
     computeResult(source, YAML_DOCUMENT, matcher: isParseYamlTask);
   }
 }