Dart: Fixes enum array encoding

mojo/dart/unittests/embedder_tests/bindings_generation_test.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:isolate';
 import 'dart:typed_data';
 import 'dart:convert';
 
 import 'package:mojo/bindings.dart' as bindings;
@@ skipping 227 matching lines @@
 
   Expect.equals(32, s2.objectUnion.fPodUnion.fUint32);
 }
 
 testUnionsToString() {
   var podUnion = new unions.PodUnion();
   podUnion.fUint32 = 32;
   Expect.equals("PodUnion(fUint32: 32)", podUnion.toString());
 }
 
+testSerializeEnumArray() {
+  var s = new regression.ContainsNullableArrayOfEnum();
+  s.arrayOfEnums = [
+    regression.NormalEnum.first,
+    regression.NormalEnum.second,
+    regression.NormalEnum.second,
+    regression.NormalEnum.first,
+  ];
+
+  var message = messageOfStruct(s);
+  var s2 = regression.ContainsNullableArrayOfEnum.deserialize(message.payload);
+  for (int i = 0; i < s.arrayOfEnums.length; i++) {
+    Expect.equals(s.arrayOfEnums[i], s2.arrayOfEnums[i]);
+  }
+}
+
 testUnions() {
   testSerializePodUnions();
   testSerializeStructInUnion();
   testSerializeArrayInUnion();
   testSerializeMapInUnion();
   testSerializeUnionInArray();
   testSerializeUnionInMap();
   testSerializeUnionInUnion();
   testUnionsToString();
+  testSerializeEnumArray();
 }
 
 class CheckEnumCapsImpl implements regression.CheckEnumCaps {
   regression.CheckEnumCapsStub _stub;
 
   CheckEnumCapsImpl(core.MojoMessagePipeEndpoint endpoint) {
     _stub = new regression.CheckEnumCapsStub.fromEndpoint(endpoint, this);
   }
 
   setEnumWithInternalAllCaps(regression.EnumWithInternalAllCaps e) {}
@@ skipping 482 matching lines @@
   testUnions();
   testValidateMojomTypes();
   testCamelCase();
   testSerializeErrorMessage();
   await testEnums();
   await testAwaitCallResponse();
   await runOnClosedTest();
   await testRegression551();
   await testServiceName();
 }