Separate the API's used by ContextManager.

pkg/analysis_server/test/operation/operation_queue_test.dart

 // Copyright (c) 2014, 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.queue;
 
 import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/context_manager.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analysis_server/src/operation/operation_queue.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 14 matching lines @@
   return operation;
 }
 
 class AnalysisContextMock extends TypedMock implements InternalAnalysisContext {
   List<Source> prioritySources = <Source>[];
 
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 class AnalysisServerMock extends TypedMock implements AnalysisServer {
-
   @override
   final ResourceProvider resourceProvider;
 
   @override
   final SearchEngine searchEngine;
 
   AnalysisServerMock({this.resourceProvider, this.searchEngine});
 
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
-class ServerContextManagerMock extends TypedMock
-    implements ServerContextManager {
+class ServerContextManagerMock extends TypedMock implements ContextManager {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 @reflectiveTest
 class ServerOperationQueueTest {
   ServerOperationQueue queue = new ServerOperationQueue();
 
   void test_clear() {
     var operationA = mockOperation(ServerOperationPriority.ANALYSIS);
     var operationB = mockOperation(ServerOperationPriority.ANALYSIS_CONTINUE);
@@ skipping 139 matching lines @@
     return ServerOperationPriority.ANALYSIS_NOTIFICATION;
   }
 
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 
   @override
   bool shouldBeDiscardedOnSourceChange(Source source) {
     return source == this.source;
   }
 }