Mojo C++ bindings: support enum validation.

mojo/public/cpp/bindings/tests/union_unittest.cc

 // 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.
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 246 matching lines @@
   internal::PodUnion_Data* data = internal::PodUnion_Data::New(&buf);
   data->tag = static_cast<internal::PodUnion_Data::PodUnion_Tag>(0xFFFFFF);
   mojo::internal::BoundsChecker bounds_checker(data,
                                                static_cast<uint32_t>(size), 0);
   void* raw_buf = buf.Leak();
   EXPECT_FALSE(
       internal::PodUnion_Data::Validate(raw_buf, &bounds_checker, false));
   free(raw_buf);
 }
 
+TEST(UnionTest, UnknownEnumValueValidation) {
+  PodUnionPtr pod(PodUnion::New());
+  pod->set_f_enum(static_cast<AnEnum>(0xFFFF));
+
+  size_t size = GetSerializedSize_(pod, false);
+  EXPECT_EQ(16U, size);
+
+  mojo::internal::FixedBufferForTesting buf(size);
+  internal::PodUnion_Data* data = nullptr;
+  SerializeUnion_(std::move(pod), &buf, &data, false);
+
+  void* raw_buf = buf.Leak();
+  mojo::internal::BoundsChecker bounds_checker(data,
+                                               static_cast<uint32_t>(size), 0);
+  EXPECT_FALSE(
+      internal::PodUnion_Data::Validate(raw_buf, &bounds_checker, false));
+  free(raw_buf);
+}
+
+TEST(UnionTest, UnknownExtensibleEnumValueValidation) {
+  PodUnionPtr pod(PodUnion::New());
+  pod->set_f_extensible_enum(static_cast<AnExtensibleEnum>(0xFFFF));
+
+  size_t size = GetSerializedSize_(pod, false);
+  EXPECT_EQ(16U, size);
+
+  mojo::internal::FixedBufferForTesting buf(size);
+  internal::PodUnion_Data* data = nullptr;
+  SerializeUnion_(std::move(pod), &buf, &data, false);
+
+  void* raw_buf = buf.Leak();
+  mojo::internal::BoundsChecker bounds_checker(data,
+                                               static_cast<uint32_t>(size), 0);
+  EXPECT_TRUE(
+      internal::PodUnion_Data::Validate(raw_buf, &bounds_checker, false));
+  free(raw_buf);
+}
+
 TEST(UnionTest, StringGetterSetter) {
   ObjectUnionPtr pod(ObjectUnion::New());
 
   String hello("hello world");
   pod->set_f_string(hello);
   EXPECT_EQ(hello, pod->get_f_string());
   EXPECT_TRUE(pod->is_f_string());
   EXPECT_EQ(pod->which(), ObjectUnion::Tag::F_STRING);
 }
 
@@ skipping 856 matching lines @@
   PodUnionPtr pod(PodUnion::New());
   pod->set_f_int16(16);
 
   ptr->Echo(std::move(pod),
             [](PodUnionPtr out) { EXPECT_EQ(16, out->get_f_int16()); });
   run_loop.RunUntilIdle();
 }
 
 }  // namespace test
 }  // namespace mojo