grpc/tests/message_builder_test.cpp - RealtimeRoboticsGroup/test - Gitiles

 #include "flatbuffers/grpc.h"
 #include "monster_test_generated.h"
 #include "test_assert.h"
 #include "test_builder.h"

 using MyGame::Example::Any_NONE;
 using MyGame::Example::CreateStat;
 using MyGame::Example::Vec3;

 bool verify(flatbuffers::grpc::Message<Monster> &msg,
             const std::string &expected_name, Color expected_color) {
   const Monster *monster = msg.GetRoot();
   const auto name = monster->name()->str();
   const auto color = monster->color();
   TEST_EQ(name, expected_name);
   TEST_EQ(color, expected_color);
   return (name == expected_name) && (color == expected_color);
 }

 bool release_n_verify(flatbuffers::grpc::MessageBuilder &mbb,
                       const std::string &expected_name, Color expected_color) {
   flatbuffers::grpc::Message<Monster> msg = mbb.ReleaseMessage<Monster>();
   return verify(msg, expected_name, expected_color);
 }

 void builder_move_assign_after_releaseraw_test(
     flatbuffers::grpc::MessageBuilder dst) {
   auto root_offset1 = populate1(dst);
   dst.Finish(root_offset1);
   size_t size, offset;
   grpc_slice slice;
   dst.ReleaseRaw(size, offset, slice);
   flatbuffers::FlatBufferBuilder src;
   auto root_offset2 = populate2(src);
   src.Finish(root_offset2);
   auto src_size = src.GetSize();
   // Move into a released builder.
   dst = std::move(src);
   TEST_EQ(dst.GetSize(), src_size);
   TEST_ASSERT(release_n_verify(dst, m2_name(), m2_color()));
   TEST_EQ(src.GetSize(), 0);
   grpc_slice_unref(slice);
 }

 template<class SrcBuilder>
 struct BuilderReuseTests<flatbuffers::grpc::MessageBuilder, SrcBuilder> {
   static void builder_reusable_after_release_message_test(
       TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE_MESSAGE)) { return; }

     flatbuffers::grpc::MessageBuilder mb;
     std::vector<flatbuffers::grpc::Message<Monster>> buffers;
     for (int i = 0; i < 5; ++i) {
       auto root_offset1 = populate1(mb);
       mb.Finish(root_offset1);
       buffers.push_back(mb.ReleaseMessage<Monster>());
       TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));
     }
   }

   static void builder_reusable_after_release_test(TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE)) { return; }

     // FIXME: Populate-Release loop fails assert(GRPC_SLICE_IS_EMPTY(slice_)) in
     // SliceAllocator::allocate in the second iteration.

     flatbuffers::grpc::MessageBuilder mb;
     std::vector<flatbuffers::DetachedBuffer> buffers;
     for (int i = 0; i < 2; ++i) {
       auto root_offset1 = populate1(mb);
       mb.Finish(root_offset1);
       buffers.push_back(mb.Release());
       TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));
     }
   }

   static void builder_reusable_after_releaseraw_test(TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE_RAW)) { return; }

     flatbuffers::grpc::MessageBuilder mb;
     for (int i = 0; i < 5; ++i) {
       auto root_offset1 = populate1(mb);
       mb.Finish(root_offset1);
       size_t size, offset;
       grpc_slice slice;
       const uint8_t *buf = mb.ReleaseRaw(size, offset, slice);
       TEST_ASSERT_FUNC(verify(buf, offset, m1_name(), m1_color()));
       grpc_slice_unref(slice);
     }
   }

   static void builder_reusable_after_release_and_move_assign_test(
       TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE_AND_MOVE_ASSIGN)) { return; }

     // FIXME: Release-move_assign loop fails assert(p ==
     // GRPC_SLICE_START_PTR(slice_)) in DetachedBuffer destructor after all the
     // iterations

     flatbuffers::grpc::MessageBuilder dst;
     std::vector<flatbuffers::DetachedBuffer> buffers;

     for (int i = 0; i < 2; ++i) {
       auto root_offset1 = populate1(dst);
       dst.Finish(root_offset1);
       buffers.push_back(dst.Release());
       TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));

       // bring dst back to life.
       SrcBuilder src;
       dst = std::move(src);
       TEST_EQ_FUNC(dst.GetSize(), 0);
       TEST_EQ_FUNC(src.GetSize(), 0);
     }
   }

   static void builder_reusable_after_release_message_and_move_assign_test(
       TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE_MESSAGE_AND_MOVE_ASSIGN)) {
       return;
     }

     flatbuffers::grpc::MessageBuilder dst;
     std::vector<flatbuffers::grpc::Message<Monster>> buffers;

     for (int i = 0; i < 5; ++i) {
       auto root_offset1 = populate1(dst);
       dst.Finish(root_offset1);
       buffers.push_back(dst.ReleaseMessage<Monster>());
       TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));

       // bring dst back to life.
       SrcBuilder src;
       dst = std::move(src);
       TEST_EQ_FUNC(dst.GetSize(), 0);
       TEST_EQ_FUNC(src.GetSize(), 0);
     }
   }

   static void builder_reusable_after_releaseraw_and_move_assign_test(
       TestSelector selector) {
     if (!selector.count(REUSABLE_AFTER_RELEASE_RAW_AND_MOVE_ASSIGN)) { return; }

     flatbuffers::grpc::MessageBuilder dst;
     for (int i = 0; i < 5; ++i) {
       auto root_offset1 = populate1(dst);
       dst.Finish(root_offset1);
       size_t size, offset;
       grpc_slice slice = grpc_empty_slice();
       const uint8_t *buf = dst.ReleaseRaw(size, offset, slice);
       TEST_ASSERT_FUNC(verify(buf, offset, m1_name(), m1_color()));
       grpc_slice_unref(slice);

       SrcBuilder src;
       dst = std::move(src);
       TEST_EQ_FUNC(dst.GetSize(), 0);
       TEST_EQ_FUNC(src.GetSize(), 0);
     }
   }

   static void run_tests(TestSelector selector) {
     builder_reusable_after_release_test(selector);
     builder_reusable_after_release_message_test(selector);
     builder_reusable_after_releaseraw_test(selector);
     builder_reusable_after_release_and_move_assign_test(selector);
     builder_reusable_after_releaseraw_and_move_assign_test(selector);
     builder_reusable_after_release_message_and_move_assign_test(selector);
   }
 };

 void slice_allocator_tests() {
   // move-construct no-delete test
   {
     size_t size = 2048;
     flatbuffers::grpc::SliceAllocator sa1;
     uint8_t *buf = sa1.allocate(size);
     TEST_ASSERT_FUNC(buf != 0);
     buf[0] = 100;
     buf[size - 1] = 200;
     flatbuffers::grpc::SliceAllocator sa2(std::move(sa1));
     // buf should not be deleted after move-construct
     TEST_EQ_FUNC(buf[0], 100);
     TEST_EQ_FUNC(buf[size - 1], 200);
     // buf is freed here
   }

   // move-assign test
   {
     flatbuffers::grpc::SliceAllocator sa1, sa2;
     uint8_t *buf = sa1.allocate(2048);
     sa1 = std::move(sa2);
     // sa1 deletes previously allocated memory in move-assign.
     // So buf is no longer usable here.
     TEST_ASSERT_FUNC(buf != 0);
   }
 }

 /// This function does not populate exactly the first half of the table. But it
 /// could.
 void populate_first_half(MyGame::Example::MonsterBuilder &wrapper,
                          flatbuffers::Offset<flatbuffers::String> name_offset) {
   wrapper.add_name(name_offset);
   wrapper.add_color(m1_color());
 }

 /// This function does not populate exactly the second half of the table. But it
 /// could.
 void populate_second_half(MyGame::Example::MonsterBuilder &wrapper) {
   wrapper.add_hp(77);
   wrapper.add_mana(88);
   Vec3 vec3;
   wrapper.add_pos(&vec3);
 }

 /// This function is a hack to update the FlatBufferBuilder reference (fbb_) in
 /// the MonsterBuilder object. This function will break if fbb_ is not the first
 /// member in MonsterBuilder. In that case, some offset must be added. This
 /// function is used exclusively for testing correctness of move operations
 /// between FlatBufferBuilders. If MonsterBuilder had a fbb_ pointer, this hack
 /// would be unnecessary. That involves a code-generator change though.
 void test_only_hack_update_fbb_reference(
     MyGame::Example::MonsterBuilder &monsterBuilder,
     flatbuffers::grpc::MessageBuilder &mb) {
   *reinterpret_cast<flatbuffers::FlatBufferBuilder **>(&monsterBuilder) = &mb;
 }

 /// This test validates correctness of move conversion of FlatBufferBuilder to a
 /// MessageBuilder DURING a table construction. Half of the table is constructed
 /// using FlatBufferBuilder and the other half of the table is constructed using
 /// a MessageBuilder.
 void builder_move_ctor_conversion_before_finish_half_n_half_table_test() {
   for (size_t initial_size = 4; initial_size <= 2048; initial_size *= 2) {
     flatbuffers::FlatBufferBuilder fbb(initial_size);
     auto name_offset = fbb.CreateString(m1_name());
     MyGame::Example::MonsterBuilder monsterBuilder(
         fbb);  // starts a table in FlatBufferBuilder
     populate_first_half(monsterBuilder, name_offset);
     flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
     test_only_hack_update_fbb_reference(monsterBuilder, mb);  // hack
     populate_second_half(monsterBuilder);
     mb.Finish(monsterBuilder.Finish());  // ends the table in MessageBuilder
     TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
     TEST_EQ_FUNC(fbb.GetSize(), 0);
   }
 }

 /// This test populates a COMPLETE inner table before move conversion and later
 /// populates more members in the outer table.
 void builder_move_ctor_conversion_before_finish_test() {
   for (size_t initial_size = 1; initial_size <= 2048; initial_size += 1) {
     flatbuffers::FlatBufferBuilder fbb(initial_size);
     auto stat_offset = CreateStat(fbb, fbb.CreateString("SomeId"), 0, 0);
     flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
     auto monster_offset =
         CreateMonster(mb, 0, 150, 100, mb.CreateString(m1_name()), 0,
                       m1_color(), Any_NONE, 0, 0, 0, 0, 0, 0, stat_offset);
     mb.Finish(monster_offset);
     {
       auto mon = flatbuffers::GetRoot<Monster>(mb.GetBufferPointer());
       TEST_NOTNULL(mon);
       TEST_NOTNULL(mon->name());
       TEST_EQ_STR(mon->name()->c_str(), m1_name().c_str());
       TEST_EQ(mon->color(), m1_color());
     }
     TEST_EQ(1, MyGame::Example::Color_Red);
     TEST_EQ(1, m1_color());
     TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
     TEST_EQ_FUNC(fbb.GetSize(), 0);
   }
 }

 /// This test validates correctness of move conversion of FlatBufferBuilder to a
 /// MessageBuilder DURING a table construction. Half of the table is constructed
 /// using FlatBufferBuilder and the other half of the table is constructed using
 /// a MessageBuilder.
 void builder_move_assign_conversion_before_finish_half_n_half_table_test() {
   flatbuffers::FlatBufferBuilder fbb;
   flatbuffers::grpc::MessageBuilder mb;

   for (int i = 0; i < 5; ++i) {
     flatbuffers::FlatBufferBuilder fbb;
     auto name_offset = fbb.CreateString(m1_name());
     MyGame::Example::MonsterBuilder monsterBuilder(
         fbb);  // starts a table in FlatBufferBuilder
     populate_first_half(monsterBuilder, name_offset);
     mb = std::move(fbb);
     test_only_hack_update_fbb_reference(monsterBuilder, mb);  // hack
     populate_second_half(monsterBuilder);
     mb.Finish(monsterBuilder.Finish());  // ends the table in MessageBuilder
     TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
     TEST_EQ_FUNC(fbb.GetSize(), 0);
   }
 }

 /// This test populates a COMPLETE inner table before move conversion and later
 /// populates more members in the outer table.
 void builder_move_assign_conversion_before_finish_test() {
   flatbuffers::FlatBufferBuilder fbb;
   flatbuffers::grpc::MessageBuilder mb;

   for (int i = 0; i < 5; ++i) {
     auto stat_offset = CreateStat(fbb, fbb.CreateString("SomeId"), 0, 0);
     mb = std::move(fbb);
     auto monster_offset =
         CreateMonster(mb, 0, 150, 100, mb.CreateString(m1_name()), 0,
                       m1_color(), Any_NONE, 0, 0, 0, 0, 0, 0, stat_offset);
     mb.Finish(monster_offset);
     TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
     TEST_EQ_FUNC(fbb.GetSize(), 0);
   }
 }

 /// This test populates data, finishes the buffer, and does move conversion
 /// after.
 void builder_move_ctor_conversion_after_finish_test() {
   flatbuffers::FlatBufferBuilder fbb;
   fbb.Finish(populate1(fbb));
   flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
   TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
   TEST_EQ_FUNC(fbb.GetSize(), 0);
 }

 /// This test populates data, finishes the buffer, and does move conversion
 /// after.
 void builder_move_assign_conversion_after_finish_test() {
   flatbuffers::FlatBufferBuilder fbb;
   flatbuffers::grpc::MessageBuilder mb;

   for (int i = 0; i < 5; ++i) {
     fbb.Finish(populate1(fbb));
     mb = std::move(fbb);
     TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
     TEST_EQ_FUNC(fbb.GetSize(), 0);
   }
 }

 void message_builder_tests() {
   using flatbuffers::FlatBufferBuilder;
   using flatbuffers::grpc::MessageBuilder;

   slice_allocator_tests();

 #ifndef __APPLE__
   builder_move_ctor_conversion_before_finish_half_n_half_table_test();
   builder_move_assign_conversion_before_finish_half_n_half_table_test();
 #endif  // __APPLE__
   builder_move_ctor_conversion_before_finish_test();
   builder_move_assign_conversion_before_finish_test();

   builder_move_ctor_conversion_after_finish_test();
   builder_move_assign_conversion_after_finish_test();

   BuilderTests<MessageBuilder, MessageBuilder>::all_tests();
   BuilderTests<MessageBuilder, FlatBufferBuilder>::all_tests();

   BuilderReuseTestSelector tests[6] = {
     // REUSABLE_AFTER_RELEASE,                 // Assertion failed:
     // (GRPC_SLICE_IS_EMPTY(slice_))
     // REUSABLE_AFTER_RELEASE_AND_MOVE_ASSIGN, // Assertion failed: (p ==
     // GRPC_SLICE_START_PTR(slice_)

     REUSABLE_AFTER_RELEASE_RAW, REUSABLE_AFTER_RELEASE_MESSAGE,
     REUSABLE_AFTER_RELEASE_MESSAGE_AND_MOVE_ASSIGN,
     REUSABLE_AFTER_RELEASE_RAW_AND_MOVE_ASSIGN
   };

   BuilderReuseTests<MessageBuilder, MessageBuilder>::run_tests(
       TestSelector(tests, tests + 6));
   BuilderReuseTests<MessageBuilder, FlatBufferBuilder>::run_tests(
       TestSelector(tests, tests + 6));
 }
	#include "flatbuffers/grpc.h"
	#include "monster_test_generated.h"
	#include "test_assert.h"
	#include "test_builder.h"

	using MyGame::Example::Any_NONE;
	using MyGame::Example::CreateStat;
	using MyGame::Example::Vec3;

	bool verify(flatbuffers::grpc::Message<Monster> &msg,
	const std::string &expected_name, Color expected_color) {
	const Monster *monster = msg.GetRoot();
	const auto name = monster->name()->str();
	const auto color = monster->color();
	TEST_EQ(name, expected_name);
	TEST_EQ(color, expected_color);
	return (name == expected_name) && (color == expected_color);
	}

	bool release_n_verify(flatbuffers::grpc::MessageBuilder &mbb,
	const std::string &expected_name, Color expected_color) {
	flatbuffers::grpc::Message<Monster> msg = mbb.ReleaseMessage<Monster>();
	return verify(msg, expected_name, expected_color);
	}

	void builder_move_assign_after_releaseraw_test(
	flatbuffers::grpc::MessageBuilder dst) {
	auto root_offset1 = populate1(dst);
	dst.Finish(root_offset1);
	size_t size, offset;
	grpc_slice slice;
	dst.ReleaseRaw(size, offset, slice);
	flatbuffers::FlatBufferBuilder src;
	auto root_offset2 = populate2(src);
	src.Finish(root_offset2);
	auto src_size = src.GetSize();
	// Move into a released builder.
	dst = std::move(src);
	TEST_EQ(dst.GetSize(), src_size);
	TEST_ASSERT(release_n_verify(dst, m2_name(), m2_color()));
	TEST_EQ(src.GetSize(), 0);
	grpc_slice_unref(slice);
	}

	template<class SrcBuilder>
	struct BuilderReuseTests<flatbuffers::grpc::MessageBuilder, SrcBuilder> {
	static void builder_reusable_after_release_message_test(
	TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE_MESSAGE)) { return; }

	flatbuffers::grpc::MessageBuilder mb;
	std::vector<flatbuffers::grpc::Message<Monster>> buffers;
	for (int i = 0; i < 5; ++i) {
	auto root_offset1 = populate1(mb);
	mb.Finish(root_offset1);
	buffers.push_back(mb.ReleaseMessage<Monster>());
	TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));
	}
	}

	static void builder_reusable_after_release_test(TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE)) { return; }

	// FIXME: Populate-Release loop fails assert(GRPC_SLICE_IS_EMPTY(slice_)) in
	// SliceAllocator::allocate in the second iteration.

	flatbuffers::grpc::MessageBuilder mb;
	std::vector<flatbuffers::DetachedBuffer> buffers;
	for (int i = 0; i < 2; ++i) {
	auto root_offset1 = populate1(mb);
	mb.Finish(root_offset1);
	buffers.push_back(mb.Release());
	TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));
	}
	}

	static void builder_reusable_after_releaseraw_test(TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE_RAW)) { return; }

	flatbuffers::grpc::MessageBuilder mb;
	for (int i = 0; i < 5; ++i) {
	auto root_offset1 = populate1(mb);
	mb.Finish(root_offset1);
	size_t size, offset;
	grpc_slice slice;
	const uint8_t *buf = mb.ReleaseRaw(size, offset, slice);
	TEST_ASSERT_FUNC(verify(buf, offset, m1_name(), m1_color()));
	grpc_slice_unref(slice);
	}
	}

	static void builder_reusable_after_release_and_move_assign_test(
	TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE_AND_MOVE_ASSIGN)) { return; }

	// FIXME: Release-move_assign loop fails assert(p ==
	// GRPC_SLICE_START_PTR(slice_)) in DetachedBuffer destructor after all the
	// iterations

	flatbuffers::grpc::MessageBuilder dst;
	std::vector<flatbuffers::DetachedBuffer> buffers;

	for (int i = 0; i < 2; ++i) {
	auto root_offset1 = populate1(dst);
	dst.Finish(root_offset1);
	buffers.push_back(dst.Release());
	TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));

	// bring dst back to life.
	SrcBuilder src;
	dst = std::move(src);
	TEST_EQ_FUNC(dst.GetSize(), 0);
	TEST_EQ_FUNC(src.GetSize(), 0);
	}
	}

	static void builder_reusable_after_release_message_and_move_assign_test(
	TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE_MESSAGE_AND_MOVE_ASSIGN)) {
	return;
	}

	flatbuffers::grpc::MessageBuilder dst;
	std::vector<flatbuffers::grpc::Message<Monster>> buffers;

	for (int i = 0; i < 5; ++i) {
	auto root_offset1 = populate1(dst);
	dst.Finish(root_offset1);
	buffers.push_back(dst.ReleaseMessage<Monster>());
	TEST_ASSERT_FUNC(verify(buffers[i], m1_name(), m1_color()));

	// bring dst back to life.
	SrcBuilder src;
	dst = std::move(src);
	TEST_EQ_FUNC(dst.GetSize(), 0);
	TEST_EQ_FUNC(src.GetSize(), 0);
	}
	}

	static void builder_reusable_after_releaseraw_and_move_assign_test(
	TestSelector selector) {
	if (!selector.count(REUSABLE_AFTER_RELEASE_RAW_AND_MOVE_ASSIGN)) { return; }

	flatbuffers::grpc::MessageBuilder dst;
	for (int i = 0; i < 5; ++i) {
	auto root_offset1 = populate1(dst);
	dst.Finish(root_offset1);
	size_t size, offset;
	grpc_slice slice = grpc_empty_slice();
	const uint8_t *buf = dst.ReleaseRaw(size, offset, slice);
	TEST_ASSERT_FUNC(verify(buf, offset, m1_name(), m1_color()));
	grpc_slice_unref(slice);

	SrcBuilder src;
	dst = std::move(src);
	TEST_EQ_FUNC(dst.GetSize(), 0);
	TEST_EQ_FUNC(src.GetSize(), 0);
	}
	}

	static void run_tests(TestSelector selector) {
	builder_reusable_after_release_test(selector);
	builder_reusable_after_release_message_test(selector);
	builder_reusable_after_releaseraw_test(selector);
	builder_reusable_after_release_and_move_assign_test(selector);
	builder_reusable_after_releaseraw_and_move_assign_test(selector);
	builder_reusable_after_release_message_and_move_assign_test(selector);
	}
	};

	void slice_allocator_tests() {
	// move-construct no-delete test
	{
	size_t size = 2048;
	flatbuffers::grpc::SliceAllocator sa1;
	uint8_t *buf = sa1.allocate(size);
	TEST_ASSERT_FUNC(buf != 0);
	buf[0] = 100;
	buf[size - 1] = 200;
	flatbuffers::grpc::SliceAllocator sa2(std::move(sa1));
	// buf should not be deleted after move-construct
	TEST_EQ_FUNC(buf[0], 100);
	TEST_EQ_FUNC(buf[size - 1], 200);
	// buf is freed here
	}

	// move-assign test
	{
	flatbuffers::grpc::SliceAllocator sa1, sa2;
	uint8_t *buf = sa1.allocate(2048);
	sa1 = std::move(sa2);
	// sa1 deletes previously allocated memory in move-assign.
	// So buf is no longer usable here.
	TEST_ASSERT_FUNC(buf != 0);
	}
	}

	/// This function does not populate exactly the first half of the table. But it
	/// could.
	void populate_first_half(MyGame::Example::MonsterBuilder &wrapper,
	flatbuffers::Offset<flatbuffers::String> name_offset) {
	wrapper.add_name(name_offset);
	wrapper.add_color(m1_color());
	}

	/// This function does not populate exactly the second half of the table. But it
	/// could.
	void populate_second_half(MyGame::Example::MonsterBuilder &wrapper) {
	wrapper.add_hp(77);
	wrapper.add_mana(88);
	Vec3 vec3;
	wrapper.add_pos(&vec3);
	}

	/// This function is a hack to update the FlatBufferBuilder reference (fbb_) in
	/// the MonsterBuilder object. This function will break if fbb_ is not the first
	/// member in MonsterBuilder. In that case, some offset must be added. This
	/// function is used exclusively for testing correctness of move operations
	/// between FlatBufferBuilders. If MonsterBuilder had a fbb_ pointer, this hack
	/// would be unnecessary. That involves a code-generator change though.
	void test_only_hack_update_fbb_reference(
	MyGame::Example::MonsterBuilder &monsterBuilder,
	flatbuffers::grpc::MessageBuilder &mb) {
	reinterpret_cast<flatbuffers::FlatBufferBuilder *>(&monsterBuilder) = &mb;
	}

	/// This test validates correctness of move conversion of FlatBufferBuilder to a
	/// MessageBuilder DURING a table construction. Half of the table is constructed
	/// using FlatBufferBuilder and the other half of the table is constructed using
	/// a MessageBuilder.
	void builder_move_ctor_conversion_before_finish_half_n_half_table_test() {
	for (size_t initial_size = 4; initial_size <= 2048; initial_size *= 2) {
	flatbuffers::FlatBufferBuilder fbb(initial_size);
	auto name_offset = fbb.CreateString(m1_name());
	MyGame::Example::MonsterBuilder monsterBuilder(
	fbb); // starts a table in FlatBufferBuilder
	populate_first_half(monsterBuilder, name_offset);
	flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
	test_only_hack_update_fbb_reference(monsterBuilder, mb); // hack
	populate_second_half(monsterBuilder);
	mb.Finish(monsterBuilder.Finish()); // ends the table in MessageBuilder
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}
	}

	/// This test populates a COMPLETE inner table before move conversion and later
	/// populates more members in the outer table.
	void builder_move_ctor_conversion_before_finish_test() {
	for (size_t initial_size = 1; initial_size <= 2048; initial_size += 1) {
	flatbuffers::FlatBufferBuilder fbb(initial_size);
	auto stat_offset = CreateStat(fbb, fbb.CreateString("SomeId"), 0, 0);
	flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
	auto monster_offset =
	CreateMonster(mb, 0, 150, 100, mb.CreateString(m1_name()), 0,
	m1_color(), Any_NONE, 0, 0, 0, 0, 0, 0, stat_offset);
	mb.Finish(monster_offset);
	{
	auto mon = flatbuffers::GetRoot<Monster>(mb.GetBufferPointer());
	TEST_NOTNULL(mon);
	TEST_NOTNULL(mon->name());
	TEST_EQ_STR(mon->name()->c_str(), m1_name().c_str());
	TEST_EQ(mon->color(), m1_color());
	}
	TEST_EQ(1, MyGame::Example::Color_Red);
	TEST_EQ(1, m1_color());
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}
	}

	/// This test validates correctness of move conversion of FlatBufferBuilder to a
	/// MessageBuilder DURING a table construction. Half of the table is constructed
	/// using FlatBufferBuilder and the other half of the table is constructed using
	/// a MessageBuilder.
	void builder_move_assign_conversion_before_finish_half_n_half_table_test() {
	flatbuffers::FlatBufferBuilder fbb;
	flatbuffers::grpc::MessageBuilder mb;

	for (int i = 0; i < 5; ++i) {
	flatbuffers::FlatBufferBuilder fbb;
	auto name_offset = fbb.CreateString(m1_name());
	MyGame::Example::MonsterBuilder monsterBuilder(
	fbb); // starts a table in FlatBufferBuilder
	populate_first_half(monsterBuilder, name_offset);
	mb = std::move(fbb);
	test_only_hack_update_fbb_reference(monsterBuilder, mb); // hack
	populate_second_half(monsterBuilder);
	mb.Finish(monsterBuilder.Finish()); // ends the table in MessageBuilder
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}
	}

	/// This test populates a COMPLETE inner table before move conversion and later
	/// populates more members in the outer table.
	void builder_move_assign_conversion_before_finish_test() {
	flatbuffers::FlatBufferBuilder fbb;
	flatbuffers::grpc::MessageBuilder mb;

	for (int i = 0; i < 5; ++i) {
	auto stat_offset = CreateStat(fbb, fbb.CreateString("SomeId"), 0, 0);
	mb = std::move(fbb);
	auto monster_offset =
	CreateMonster(mb, 0, 150, 100, mb.CreateString(m1_name()), 0,
	m1_color(), Any_NONE, 0, 0, 0, 0, 0, 0, stat_offset);
	mb.Finish(monster_offset);
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}
	}

	/// This test populates data, finishes the buffer, and does move conversion
	/// after.
	void builder_move_ctor_conversion_after_finish_test() {
	flatbuffers::FlatBufferBuilder fbb;
	fbb.Finish(populate1(fbb));
	flatbuffers::grpc::MessageBuilder mb(std::move(fbb));
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}

	/// This test populates data, finishes the buffer, and does move conversion
	/// after.
	void builder_move_assign_conversion_after_finish_test() {
	flatbuffers::FlatBufferBuilder fbb;
	flatbuffers::grpc::MessageBuilder mb;

	for (int i = 0; i < 5; ++i) {
	fbb.Finish(populate1(fbb));
	mb = std::move(fbb);
	TEST_ASSERT_FUNC(release_n_verify(mb, m1_name(), m1_color()));
	TEST_EQ_FUNC(fbb.GetSize(), 0);
	}
	}

	void message_builder_tests() {
	using flatbuffers::FlatBufferBuilder;
	using flatbuffers::grpc::MessageBuilder;

	slice_allocator_tests();

	#ifndef __APPLE__
	builder_move_ctor_conversion_before_finish_half_n_half_table_test();
	builder_move_assign_conversion_before_finish_half_n_half_table_test();
	#endif // __APPLE__
	builder_move_ctor_conversion_before_finish_test();
	builder_move_assign_conversion_before_finish_test();

	builder_move_ctor_conversion_after_finish_test();
	builder_move_assign_conversion_after_finish_test();

	BuilderTests<MessageBuilder, MessageBuilder>::all_tests();
	BuilderTests<MessageBuilder, FlatBufferBuilder>::all_tests();

	BuilderReuseTestSelector tests[6] = {
	// REUSABLE_AFTER_RELEASE, // Assertion failed:
	// (GRPC_SLICE_IS_EMPTY(slice_))
	// REUSABLE_AFTER_RELEASE_AND_MOVE_ASSIGN, // Assertion failed: (p ==
	// GRPC_SLICE_START_PTR(slice_)

	REUSABLE_AFTER_RELEASE_RAW, REUSABLE_AFTER_RELEASE_MESSAGE,
	REUSABLE_AFTER_RELEASE_MESSAGE_AND_MOVE_ASSIGN,
	REUSABLE_AFTER_RELEASE_RAW_AND_MOVE_ASSIGN
	};

	BuilderReuseTests<MessageBuilder, MessageBuilder>::run_tests(
	TestSelector(tests, tests + 6));
	BuilderReuseTests<MessageBuilder, FlatBufferBuilder>::run_tests(
	TestSelector(tests, tests + 6));
	}