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

pkg/analyzer/test/dart/ast/visitor_test.dart

Index: pkg/analyzer/test/dart/ast/visitor_test.dart
diff --git a/pkg/analyzer/test/dart/ast/visitor_test.dart b/pkg/analyzer/test/dart/ast/visitor_test.dart
index 45ba1962ea642f121fec5985fc430d32cbd71dc9..5fe5219576ead62f160ae233014833bebf1df03e 100644
--- a/pkg/analyzer/test/dart/ast/visitor_test.dart
+++ b/pkg/analyzer/test/dart/ast/visitor_test.dart
@@ -6,8 +6,8 @@ library analyzer.test.dart.ast.visitor_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../generated/parser_test.dart' show ParserTestCase;
 import '../../generated/test_support.dart';
@@ -15,7 +15,9 @@ import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(BreadthFirstVisitorTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(BreadthFirstVisitorTest);
+  });
 }
 
 @reflectiveTest