Re-apply change to move to plugin package

pkg/analyzer/test/plugin/plugin_impl_test.dart

-// Copyright (c) 2015, 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.
-
-library test.operation;
-
-import 'package:analyzer/plugin/plugin.dart';
-import 'package:analyzer/src/plugin/plugin_impl.dart';
-import 'package:unittest/unittest.dart';
-
-main() {
-  groupSep = ' | ';
-
-  group('ExtensionManager', () {
-    test('processPlugins', () {
-      TestPlugin plugin1 = new TestPlugin('plugin1');
-      TestPlugin plugin2 = new TestPlugin('plugin1');
-      ExtensionManager manager = new ExtensionManager();
-      manager.processPlugins([plugin1, plugin2]);
-      expect(plugin1.extensionPointsRegistered, true);
-      expect(plugin1.extensionsRegistered, true);
-      expect(plugin2.extensionPointsRegistered, true);
-      expect(plugin2.extensionsRegistered, true);
-    });
-
-    test('registerExtension - valid', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionManager manager = new ExtensionManager();
-      ExtensionPoint point =
-          manager.registerExtensionPoint(plugin, 'point', null);
-      expect(point, isNotNull);
-      Object extension = 'extension';
-      manager.registerExtension('plugin.point', extension);
-      List<Object> extensions = point.extensions;
-      expect(extensions, isNotNull);
-      expect(extensions, hasLength(1));
-      expect(extensions[0], extension);
-    });
-
-    test('registerExtension - non existent', () {
-      ExtensionManager manager = new ExtensionManager();
-      expect(() => manager.registerExtension('does not exist', 'extension'),
-          throwsA(new isInstanceOf<ExtensionError>()));
-      ;
-    });
-
-    test('registerExtensionPoint - non-conflicting', () {
-      Plugin plugin1 = new TestPlugin('plugin1');
-      Plugin plugin2 = new TestPlugin('plugin2');
-      ExtensionManager manager = new ExtensionManager();
-      expect(
-          manager.registerExtensionPoint(plugin1, 'point1', null), isNotNull);
-      expect(
-          manager.registerExtensionPoint(plugin1, 'point2', null), isNotNull);
-      expect(
-          manager.registerExtensionPoint(plugin2, 'point1', null), isNotNull);
-      expect(
-          manager.registerExtensionPoint(plugin2, 'point2', null), isNotNull);
-    });
-
-    test('registerExtensionPoint - conflicting - same plugin', () {
-      Plugin plugin1 = new TestPlugin('plugin1');
-      ExtensionManager manager = new ExtensionManager();
-      expect(
-          manager.registerExtensionPoint(plugin1, 'point1', null), isNotNull);
-      expect(() => manager.registerExtensionPoint(plugin1, 'point1', null),
-          throwsA(new isInstanceOf<ExtensionError>()));
-    });
-
-    test('registerExtensionPoint - conflicting - different plugins', () {
-      Plugin plugin1 = new TestPlugin('plugin1');
-      Plugin plugin2 = new TestPlugin('plugin1');
-      ExtensionManager manager = new ExtensionManager();
-      expect(
-          manager.registerExtensionPoint(plugin1, 'point1', null), isNotNull);
-      expect(() => manager.registerExtensionPoint(plugin2, 'point1', null),
-          throwsA(new isInstanceOf<ExtensionError>()));
-    });
-  });
-
-  group('ExtensionPointImpl', () {
-    test('extensions - empty', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point', null);
-      List<Object> extensions = point.extensions;
-      expect(extensions, isNotNull);
-      expect(extensions, isEmpty);
-    });
-
-    test('uniqueIdentifier', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point', null);
-      expect(point.uniqueIdentifier, 'plugin.point');
-    });
-
-    test('add - single', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point', null);
-      Object extension = 'extension';
-      point.add(extension);
-      List<Object> extensions = point.extensions;
-      expect(extensions, isNotNull);
-      expect(extensions, hasLength(1));
-      expect(extensions[0], extension);
-    });
-
-    test('add - multiple', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point', null);
-      point.add('extension 1');
-      point.add('extension 2');
-      point.add('extension 3');
-      List<Object> extensions = point.extensions;
-      expect(extensions, isNotNull);
-      expect(extensions, hasLength(3));
-    });
-
-    test('add - with validator - valid', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point',
-          (Object extension) {
-        if (extension is! String) {
-          throw new ExtensionError('');
-        }
-      });
-      point.add('extension');
-    });
-
-    test('add - with validator - invalid', () {
-      Plugin plugin = new TestPlugin('plugin');
-      ExtensionPointImpl point = new ExtensionPointImpl(plugin, 'point',
-          (Object extension) {
-        if (extension is! String) {
-          throw new ExtensionError('');
-        }
-      });
-      expect(() => point.add(1), throwsA(new isInstanceOf<ExtensionError>()));
-    });
-  });
-}
-
-/**
- * A simple plugin that can be used by tests.
- */
-class TestPlugin extends Plugin {
-  /**
-   * A flag indicating whether the method [registerExtensionPoints] has been
-   * invoked.
-   */
-  bool extensionPointsRegistered = false;
-
-  /**
-   * A flag indicating whether the method [registerExtensions] has been invoked.
-   */
-  bool extensionsRegistered = false;
-
-  @override
-  String uniqueIdentifier;
-
-  /**
-   * Initialize a newly created plugin to have the given identifier.
-   */
-  TestPlugin(this.uniqueIdentifier);
-
-  @override
-  void registerExtensionPoints(RegisterExtensionPoint register) {
-    extensionPointsRegistered = true;
-  }
-
-  @override
-  void registerExtensions(RegisterExtension register) {
-    extensionsRegistered = true;
-  }
-}