add sdkPath and enable tests

pkg/analysis_server/test/domain_context_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.domain.context;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_context.dart';
 import 'package:analysis_server/src/domain_server.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:unittest/matcher.dart';
 import 'package:unittest/unittest.dart';
 
 import 'mocks.dart';
 
 main() {
-//  group('ContextDomainHandlerTest', () {
-//    test('applyChanges', ContextDomainHandlerTest.applyChanges);
-//    test('setOptions', ContextDomainHandlerTest.setOptions);
-//    test('setPrioritySources_empty', ContextDomainHandlerTest.setPrioritySources_empty);
-//    test('setPrioritySources_nonEmpty', ContextDomainHandlerTest.setPrioritySources_nonEmpty);
-//  });
+  group('ContextDomainHandlerTest', () {
+    test('applyChanges', ContextDomainHandlerTest.applyChanges);
+    test('setOptions', ContextDomainHandlerTest.setOptions);
+    test('setPrioritySources_empty', ContextDomainHandlerTest.setPrioritySources_empty);
+    test('setPrioritySources_nonEmpty', ContextDomainHandlerTest.setPrioritySources_nonEmpty);
+  });
 }
 
 class ContextDomainHandlerTest {
   static void applyChanges() {
     AnalysisServer server = new AnalysisServer(new MockServerChannel());
     String contextId = _createContext(server);
     ChangeSet changeSet = new ChangeSet();
     ContextDomainHandler handler = new ContextDomainHandler(server);
 
     Request request = new Request('0', ContextDomainHandler.APPLY_CHANGES_NAME);
     request.setParameter(ContextDomainHandler.CONTEXT_ID_PARAM, contextId);
-    request.setParameter(ContextDomainHandler.CHANGES_PARAM, changeSet);
+    // TODO (danrubel) convert ChangeSet to Map
+//    request.setParameter(ContextDomainHandler.CHANGES_PARAM, changeSet);
+    request.setParameter(ContextDomainHandler.CHANGES_PARAM, new Map());
     Response response = handler.handleRequest(request);
     expect(response.toJson(), equals({
       Response.ID: '0',
       Response.ERROR: null
     }));
   }
 
   static void setOptions() {
     AnalysisServer server = new AnalysisServer(new MockServerChannel());
     String contextId = _createContext(server);
@@ skipping 39 matching lines @@
     Response response = handler.handleRequest(request);
     expect(response.toJson(), equals({
       Response.ID: '0',
       Response.ERROR: null
     }));
   }
 
   static String _createContext(AnalysisServer server) {
     ServerDomainHandler handler = new ServerDomainHandler(server);
     Request request = new Request('0', ServerDomainHandler.CREATE_CONTEXT_METHOD);
-    request.setParameter(ServerDomainHandler.SDK_DIRECTORY_PARAM, '');
+    request.setParameter(ServerDomainHandler.SDK_DIRECTORY_PARAM, sdkPath);
     Response response = handler.handleRequest(request);
+    expect(response.error, isNull);
     return response.getResult(ServerDomainHandler.CONTEXT_ID_RESULT);
   }
 }