Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/analysis/get_errors_test.dart

 // Copyright (c) 2014, 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 test.analysis.get_errors;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../analysis_abstract.dart';
 import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(GetErrorsTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(GetErrorsTest);
+  });
 }
 
 @reflectiveTest
 class GetErrorsTest extends AbstractAnalysisTest {
   static const String requestId = 'test-getError';
 
   @override
   void setUp() {
     super.setUp();
-    server.handlers = [new AnalysisDomainHandler(server),];
+    server.handlers = [
+      new AnalysisDomainHandler(server),
+    ];
     createProject();
   }
 
   test_afterAnalysisComplete() async {
     addTestFile('''
 main() {
   print(42)
 }
 ''');
     await waitForTasksFinished();
@@ skipping 99 matching lines @@
   Request _createGetErrorsRequest(String file) {
     return new AnalysisGetErrorsParams(file).toRequest(requestId);
   }
 
   Future<List<AnalysisError>> _getErrors(String file) async {
     Request request = _createGetErrorsRequest(file);
     Response response = await serverChannel.sendRequest(request);
     return new AnalysisGetErrorsResult.fromResponse(response).errors;
   }
 }