Add plugin support for getAssists

pkg/analysis_server/test/edit/fixes_test.dart

Index: pkg/analysis_server/test/edit/fixes_test.dart
diff --git a/pkg/analysis_server/test/edit/fixes_test.dart b/pkg/analysis_server/test/edit/fixes_test.dart
index 3cd22c04b56a24a76a2f94b94fcff2ff11d8c1da..ff8d246f9acfa5cadbeece2397731678fc6789fe 100644
--- a/pkg/analysis_server/test/edit/fixes_test.dart
+++ b/pkg/analysis_server/test/edit/fixes_test.dart
@@ -2,12 +2,14 @@
 // 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.edit.fixes;
-
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/edit/edit_domain.dart';
+import 'package:analysis_server/src/plugin/plugin_manager.dart';
+import 'package:analyzer_plugin/protocol/protocol.dart' as plugin;
+import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
+import 'package:analyzer_plugin/src/protocol/protocol_internal.dart' as plugin;
 import 'package:plugin/manager.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ -24,6 +26,7 @@ main() {
 class FixesTest extends AbstractAnalysisTest {
   @override
   void setUp() {
+    enableNewAnalysisDriver = true;
     super.setUp();
     ExtensionManager manager = new ExtensionManager();
     manager.processPlugins([server.serverPlugin]);
@@ -49,6 +52,28 @@ main() {
     expect(fixes[1].message, matches('Create class'));
   }
 
+  test_fromPlugins() async {
+    PluginInfo info = new PluginInfo('a', 'b', 'c', null, null);
+    plugin.AnalysisErrorFixes fixes = new plugin.AnalysisErrorFixes(
+        new plugin.AnalysisError(
+            plugin.AnalysisErrorSeverity.ERROR,
+            plugin.AnalysisErrorType.HINT,
+            new plugin.Location('', 0, 0, 0, 0),
+            'message',
+            'code'));
+    plugin.EditGetFixesResult result =
+        new plugin.EditGetFixesResult(<plugin.AnalysisErrorFixes>[fixes]);
+    pluginManager.broadcastResults = <PluginInfo, Future<plugin.Response>>{
+      info: new Future.value(result.toResponse('-'))
+    };
+
+    createProject();
+    addTestFile('main() {}');
+    await waitForTasksFinished();
+    List<AnalysisErrorFixes> errorFixes = await _getFixesAt('in(');
+    expect(errorFixes, hasLength(1));
+  }
+
   test_hasFixes() async {
     createProject();
     addTestFile('''