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

pkg/analyzer/test/file_system/resource_uri_resolver_test.dart

Index: pkg/analyzer/test/file_system/resource_uri_resolver_test.dart
diff --git a/pkg/analyzer/test/file_system/resource_uri_resolver_test.dart b/pkg/analyzer/test/file_system/resource_uri_resolver_test.dart
index 482149b84ff0a3f10dc757728d6973e452832a99..610048d282f25c2073ca46e6a6a4877eafe29389 100644
--- a/pkg/analyzer/test/file_system/resource_uri_resolver_test.dart
+++ b/pkg/analyzer/test/file_system/resource_uri_resolver_test.dart
@@ -7,14 +7,13 @@ library analyzer.test.file_system.resource_uri_resolver_test;
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/source.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(ResourceUriResolverTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(ResourceUriResolverTest);
+  });
 }
 
 @reflectiveTest