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

pkg/analyzer/test/file_system/physical_resource_provider_test.dart

Index: pkg/analyzer/test/file_system/physical_resource_provider_test.dart
diff --git a/pkg/analyzer/test/file_system/physical_resource_provider_test.dart b/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
index 6be1f2b77ecd380cbcc8d2c9dddbd736b07cf28d..07b62e21622e5961858f702a4d7c44281c64dc43 100644
--- a/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
+++ b/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
@@ -12,18 +12,17 @@ import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:path/path.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 import 'package:watcher/watcher.dart';
 
-import '../utils.dart';
-
 main() {
-  initializeTestEnvironment();
   if (!new bool.fromEnvironment('skipPhysicalResourceProviderTests')) {
-    defineReflectiveTests(PhysicalResourceProviderTest);
-    defineReflectiveTests(FileTest);
-    defineReflectiveTests(FolderTest);
+    defineReflectiveSuite(() {
+      defineReflectiveTests(PhysicalResourceProviderTest);
+      defineReflectiveTests(FileTest);
+      defineReflectiveTests(FolderTest);
+    });
   }
 }