Add support for three more plugin requests

pkg/analysis_server/test/analysis/update_content_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.analysis.updateContent;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.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:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 
 import '../analysis_abstract.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(UpdateContentTest);
   });
@@ skipping 236 matching lines @@
     filesErrors.clear();
     server.test_flushAstStructures(testFile);
     server.updateContent('2', {
       testFile: new ChangeContentOverlay([new SourceEdit(0, 4, 'main')])
     });
     await server.onAnalysisComplete;
     // errors should have been resent
     expect(filesErrors, isNotEmpty);
   }
 
+  test_sentToPlugins() {
+    String filePath = '/project/target.dart';
+    String fileContent = 'import "none.dart";';
+    //
+    // Add
+    //
+    handleSuccessfulRequest(new AnalysisUpdateContentParams(
+            <String, dynamic>{filePath: new AddContentOverlay(fileContent)})
+        .toRequest('0'));
+    plugin.AnalysisUpdateContentParams params =
+        pluginManager.analysisUpdateContentParams;
+    expect(params, isNotNull);
+    Map<String, dynamic> files = params.files;
+    expect(files, hasLength(1));
+    Object overlay = files[filePath];
+    expect(overlay, new isInstanceOf<plugin.AddContentOverlay>());
+    plugin.AddContentOverlay addOverlay = overlay;
+    expect(addOverlay.content, fileContent);
+    //
+    // Change
+    //
+    pluginManager.analysisUpdateContentParams = null;
+    handleSuccessfulRequest(new AnalysisUpdateContentParams(<String, dynamic>{
+      filePath: new ChangeContentOverlay(
+          <SourceEdit>[new SourceEdit(8, 1, "'"), new SourceEdit(18, 1, "'")])
+    }).toRequest('1'));
+    params = pluginManager.analysisUpdateContentParams;
+    expect(params, isNotNull);
+    files = params.files;
+    expect(files, hasLength(1));
+    overlay = files[filePath];
+    expect(overlay, new isInstanceOf<plugin.ChangeContentOverlay>());
+    plugin.ChangeContentOverlay changeOverlay = overlay;
+    expect(changeOverlay.edits, hasLength(2));
+    //
+    // Remove
+    //
+    pluginManager.analysisUpdateContentParams = null;
+    handleSuccessfulRequest(new AnalysisUpdateContentParams(
+            <String, dynamic>{filePath: new RemoveContentOverlay()})
+        .toRequest('2'));
+    params = pluginManager.analysisUpdateContentParams;
+    expect(params, isNotNull);
+    files = params.files;
+    expect(files, hasLength(1));
+    overlay = files[filePath];
+    expect(overlay, new isInstanceOf<plugin.RemoveContentOverlay>());
+  }
+
   CompilationUnit _getTestUnit() {
     ContextSourcePair pair = server.getContextSourcePair(testFile);
     AnalysisContext context = pair.context;
     Source source = pair.source;
     return context.getResolvedCompilationUnit2(source, source);
   }
 
   List<Source> _getUserSources(AnalysisContext context) {
     List<Source> sources = <Source>[];
     context.sources.forEach((source) {
@@ skipping 12 matching lines @@
 
   @override
   bool matches(arg) {
     return arg is CompilationUnit &&
         resolutionMap.elementDeclaredByCompilationUnit(arg).source.fullName ==
             file;
   }
 }
 
 class _MockIndex extends TypedMock implements Index {}