Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/search/search_result_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.search.search_result;
 
 import 'package:analysis_server/src/protocol_server.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(SearchResultKindTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(SearchResultKindTest);
+  });
 }
 
 @reflectiveTest
 class SearchResultKindTest {
   void test_fromEngine() {
     expect(newSearchResultKind_fromEngine(MatchKind.DECLARATION),
         SearchResultKind.DECLARATION);
     expect(
         newSearchResultKind_fromEngine(MatchKind.READ), SearchResultKind.READ);
     expect(newSearchResultKind_fromEngine(MatchKind.READ_WRITE),
@@ skipping 22 matching lines @@
         SearchResultKind.INVOCATION);
     expect(new SearchResultKind(SearchResultKind.UNKNOWN.name),
         SearchResultKind.UNKNOWN);
   }
 
   void test_toString() {
     expect(SearchResultKind.DECLARATION.toString(),
         'SearchResultKind.DECLARATION');
   }
 }