Add top-level driver and abstract plugin superclass

pkg/analyzer_plugin/test/utilities/subscription_manager_test.dart

+// Copyright (c) 2017, 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.
+
+import 'package:analyzer_plugin/protocol/generated_protocol.dart';
+import 'package:analyzer_plugin/utilities/subscription_manager.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+void main() {
+  defineReflectiveTests(SubscriptionManagerTest);
+}
+
+@reflectiveTest
+class SubscriptionManagerTest {
+  SubscriptionManager manager = new SubscriptionManager();
+
+  test_servicesForFile() {
+    expect(manager.servicesForFile('/project/lib/test.dart'), hasLength(0));
+  }
+
+  test_setSubscriptions() {
+    manager.setSubscriptions({
+      AnalysisService.HIGHLIGHTS: [
+        '/project/lib/foo.dart',
+        '/project/lib/bar.dart'
+      ],
+      AnalysisService.NAVIGATION: ['/project/lib/foo.dart']
+    });
+    expect(manager.servicesForFile('/project/lib/test.dart'), hasLength(0));
+    expect(manager.servicesForFile('/project/lib/bar.dart'),
+        unorderedEquals([AnalysisService.HIGHLIGHTS]));
+    expect(
+        manager.servicesForFile('/project/lib/foo.dart'),
+        unorderedEquals(
+            [AnalysisService.HIGHLIGHTS, AnalysisService.NAVIGATION]));
+  }
+}