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

pkg/analyzer/test/source/analysis_options_provider_test.dart

Index: pkg/analyzer/test/source/analysis_options_provider_test.dart
diff --git a/pkg/analyzer/test/source/analysis_options_provider_test.dart b/pkg/analyzer/test/source/analysis_options_provider_test.dart
index 6e1b339a15feadd5117db506758292585481c3b0..049feb98694e7a4252404b1855cb258acd3198dc 100644
--- a/pkg/analyzer/test/source/analysis_options_provider_test.dart
+++ b/pkg/analyzer/test/source/analysis_options_provider_test.dart
@@ -10,8 +10,8 @@ import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 import 'package:yaml/yaml.dart';
 
 import '../resource_utils.dart';
@@ -19,8 +19,10 @@ import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(AnalysisOptionsProviderOldTest);
-  defineReflectiveTests(AnalysisOptionsProviderNewTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(AnalysisOptionsProviderOldTest);
+    defineReflectiveTests(AnalysisOptionsProviderNewTest);
+  });
   group('AnalysisOptionsProvider', () {
     void expectMergesTo(String defaults, String overrides, String expected) {
       var optionsProvider = new AnalysisOptionsProvider();