compiler/back_end/cpp/testcode/auto_array_size_test.cc - third_party/github.com/google/emboss - Git at Google

 // Copyright 2019 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 // Tests for automatically-sized arrays from auto_array_size.emb.

 #include <stdint.h>

 #include <iterator>
 #include <random>
 #include <vector>

 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "runtime/cpp/emboss_text_util.h"
 #include "testdata/auto_array_size.emb.h"

 namespace emboss {
 namespace test {
 namespace {

 alignas(8) static const ::std::uint8_t kAutoSize[22] = {
     0x03,                                // 0:1    array_size == 3
     0x10, 0x20, 0x30, 0x40,              // 1:5    four_byte_array
     0x11, 0x12, 0x21, 0x22,              // 5:9    four_struct_array[0, 1]
     0x31, 0x32, 0x41, 0x42,              // 9:13   four_struct_array[2, 3]
     0x50, 0x60, 0x70,                    // 13:16  dynamic_byte_array
     0x51, 0x52, 0x61, 0x62, 0x71, 0x72,  // 16:22  dynamic_struct_array
 };

 TEST(AutoSizeView, IteratorIncrement) {
   auto src_buf = ::std::vector</**/ ::std::uint8_t>(
       kAutoSize, kAutoSize + sizeof kAutoSize);
   auto src = MakeAutoSizeView(&src_buf).four_struct_array();
   auto dst_buf = ::std::vector</**/ ::std::uint8_t>(
       kAutoSize, kAutoSize + sizeof kAutoSize);
   auto dst = MakeAutoSizeView(&dst_buf).four_struct_array();
   EXPECT_TRUE(src.Equals(dst));

   ::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
   EXPECT_FALSE(src.Equals(dst));
   for (auto src_it = src.begin(), dst_it = dst.begin();
        src_it != src.end() && dst_it != dst.end(); ++src_it, ++dst_it) {
     dst_it->CopyFrom(*src_it);
   }
   EXPECT_TRUE(src.Equals(dst));

   ::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
   EXPECT_FALSE(src.Equals(dst));
   for (auto src_it = src.begin(), dst_it = dst.begin();
        src_it != src.end() && dst_it != dst.end(); src_it++, dst_it++) {
     dst_it->CopyFrom(*src_it);
   }
   EXPECT_TRUE(src.Equals(dst));

   ::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
   EXPECT_FALSE(src.Equals(dst));
   for (auto src_it = src.rbegin(), dst_it = dst.rbegin();
        src_it != src.rend() && dst_it != dst.rend(); ++src_it, ++dst_it) {
     dst_it->CopyFrom(*src_it);
   }
   EXPECT_TRUE(src.Equals(dst));

   ::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
   EXPECT_FALSE(src.Equals(dst));
   for (auto src_it = src.rbegin(), dst_it = dst.rbegin();
        src_it != src.rend() && dst_it != dst.rend(); src_it++, dst_it++) {
     dst_it->CopyFrom(*src_it);
   }
   EXPECT_TRUE(src.Equals(dst));

   EXPECT_EQ(src.begin(), src.begin()++);
   EXPECT_EQ(src.rbegin(), src.rbegin()++);
   EXPECT_EQ(src.end(), (src.end())--);
   EXPECT_EQ(src.rend(), src.rend()--);
 }

 TEST(AutoSizeView, PreviousNext) {
   auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();
   EXPECT_TRUE(::std::next(view.begin(), 0)->Equals(view[0]));
   EXPECT_TRUE(::std::next(view.begin(), 1)->Equals(view[1]));
   EXPECT_TRUE(::std::next(view.begin(), 2)->Equals(view[2]));
   EXPECT_TRUE(::std::next(view.begin(), 3)->Equals(view[3]));

   EXPECT_TRUE(::std::next(view.rbegin(), 0)->Equals(view[3]));
   EXPECT_TRUE(::std::next(view.rbegin(), 1)->Equals(view[2]));
   EXPECT_TRUE(::std::next(view.rbegin(), 2)->Equals(view[1]));
   EXPECT_TRUE(::std::next(view.rbegin(), 3)->Equals(view[0]));

   EXPECT_TRUE(::std::prev(view.end(), 1)->Equals(view[3]));
   EXPECT_TRUE(::std::prev(view.end(), 2)->Equals(view[2]));
   EXPECT_TRUE(::std::prev(view.end(), 3)->Equals(view[1]));
   EXPECT_TRUE(::std::prev(view.end(), 4)->Equals(view[0]));

   EXPECT_TRUE(::std::prev(view.rend(), 1)->Equals(view[0]));
   EXPECT_TRUE(::std::prev(view.rend(), 2)->Equals(view[1]));
   EXPECT_TRUE(::std::prev(view.rend(), 3)->Equals(view[2]));
   EXPECT_TRUE(::std::prev(view.rend(), 4)->Equals(view[3]));
 }

 TEST(AutoSizeView, ForEach) {
   auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

   int i = 0;
   ::std::for_each(view.begin(), view.end(), [&](ElementView element) {
     ASSERT_TRUE(element.Equals(view[i++]));
   });

   i = view.ElementCount() - 1;
   ::std::for_each(view.rbegin(), view.rend(), [&](ElementView element) {
     ASSERT_TRUE(element.Equals(view[i--]));
   });
 }

 TEST(AutoSizeView, Find) {
   auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

   EXPECT_TRUE(
       ::std::find_if(view.begin(), view.end(), [view](ElementView element) {
         return element.Equals(view[0]);
       })->Equals(view[0]));
   EXPECT_TRUE(
       ::std::find_if(view.begin(), view.end(), [view](ElementView element) {
         return element.Equals(view[1]);
       })->Equals(view[1]));
   EXPECT_TRUE(
       ::std::find_if(view.begin(), view.end(), [view](ElementView element) {
         return element.Equals(view[2]);
       })->Equals(view[2]));
   EXPECT_TRUE(
       ::std::find_if(view.begin(), view.end(), [view](ElementView element) {
         return element.Equals(view[3]);
       })->Equals(view[3]));

   EXPECT_TRUE(
       ::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
         return element.Equals(view[0]);
       })->Equals(view[0]));
   EXPECT_TRUE(
       ::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
         return element.Equals(view[1]);
       })->Equals(view[1]));
   EXPECT_TRUE(
       ::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
         return element.Equals(view[2]);
       })->Equals(view[2]));
   EXPECT_TRUE(
       ::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
         return element.Equals(view[3]);
       })->Equals(view[3]));
 }

 TEST(AutoSizeView, Comparison) {
   auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

   EXPECT_EQ(view.begin() + view.ElementCount(), view.end());
   EXPECT_EQ(view.end() - view.ElementCount(), view.begin());

   EXPECT_EQ(view.rbegin() + view.ElementCount(), view.rend());
   EXPECT_EQ(view.rend() - view.ElementCount(), view.rbegin());

   EXPECT_LT(view.begin(), view.end());
   EXPECT_LT(view.rbegin(), view.rend());

   EXPECT_LE(view.begin() - 1, view.end());
   EXPECT_LE(view.rbegin() - 1, view.rend());
   EXPECT_LE(view.begin() - 1, view.end());
   EXPECT_LE(view.rbegin() - 1, view.rend());

   EXPECT_GT(view.end(), view.begin());
   EXPECT_GT(view.rend(), view.rbegin());

   EXPECT_GE(view.end() + 1, view.begin());
   EXPECT_GE(view.end() + 1, view.begin());
   EXPECT_GE(view.rend() + 1, view.rbegin());
   EXPECT_GE(view.rend() + 1, view.rbegin());
 }

 TEST(AutoSizeView, RangeBasedFor) {
   auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

   int i = 0;
   for (auto element : view) {
     ASSERT_TRUE(element.Equals(view[i++]));
   }
 }

 TEST(AutoSizeView, CanReadAutoArrays) {
   auto view = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
       kAutoSize, sizeof kAutoSize);
   EXPECT_EQ(22U, view.SizeInBytes());
   EXPECT_EQ(3U, view.array_size().Read());
   EXPECT_EQ(0x10U, view.four_byte_array()[0].Read());
   EXPECT_EQ(0x20U, view.four_byte_array()[1].Read());
   EXPECT_EQ(0x30U, view.four_byte_array()[2].Read());
   EXPECT_EQ(0x40U, view.four_byte_array()[3].Read());
   EXPECT_EQ(4U, view.four_byte_array().SizeInBytes());
   EXPECT_DEATH(view.four_byte_array()[4].Read(), "");
   EXPECT_EQ(0x11U, view.four_struct_array()[0].a().Read());
   EXPECT_EQ(0x12U, view.four_struct_array()[0].b().Read());
   EXPECT_EQ(0x21U, view.four_struct_array()[1].a().Read());
   EXPECT_EQ(0x22U, view.four_struct_array()[1].b().Read());
   EXPECT_EQ(0x31U, view.four_struct_array()[2].a().Read());
   EXPECT_EQ(0x32U, view.four_struct_array()[2].b().Read());
   EXPECT_EQ(0x41U, view.four_struct_array()[3].a().Read());
   EXPECT_EQ(0x42U, view.four_struct_array()[3].b().Read());
   EXPECT_EQ(8U, view.four_struct_array().SizeInBytes());
   EXPECT_DEATH(view.four_struct_array()[4].a().Read(), "");
   EXPECT_EQ(0x50U, view.dynamic_byte_array()[0].Read());
   EXPECT_EQ(0x60U, view.dynamic_byte_array()[1].Read());
   EXPECT_EQ(0x70U, view.dynamic_byte_array()[2].Read());
   EXPECT_EQ(3U, view.dynamic_byte_array().SizeInBytes());
   EXPECT_FALSE(view.dynamic_byte_array()[3].IsComplete());
   EXPECT_EQ(0x51U, view.dynamic_struct_array()[0].a().Read());
   EXPECT_EQ(0x52U, view.dynamic_struct_array()[0].b().Read());
   EXPECT_EQ(0x61U, view.dynamic_struct_array()[1].a().Read());
   EXPECT_EQ(0x62U, view.dynamic_struct_array()[1].b().Read());
   EXPECT_EQ(0x71U, view.dynamic_struct_array()[2].a().Read());
   EXPECT_EQ(0x72U, view.dynamic_struct_array()[2].b().Read());
   EXPECT_EQ(6U, view.dynamic_struct_array().SizeInBytes());
   EXPECT_FALSE(view.dynamic_struct_array()[3].IsComplete());
 }

 TEST(AutoSizeWriter, CanWriteAutoArrays) {
   ::std::vector<char> buffer(sizeof kAutoSize, 0);
   auto writer = MakeAutoSizeView(&buffer);
   writer.array_size().Write(0);
   EXPECT_EQ(13U, writer.SizeInBytes());
   EXPECT_DEATH(writer.dynamic_byte_array()[0].Read(), "");
   writer.array_size().Write(3);
   EXPECT_EQ(22U, writer.SizeInBytes());
   writer.four_byte_array()[0].Write(0x10);
   writer.four_byte_array()[1].Write(0x20);
   writer.four_byte_array()[2].Write(0x30);
   writer.four_byte_array()[3].Write(0x40);
   EXPECT_DEATH(writer.four_byte_array()[4].Write(0), "");
   writer.four_struct_array()[0].a().Write(0x11);
   writer.four_struct_array()[0].b().Write(0x12);
   writer.four_struct_array()[1].a().Write(0x21);
   writer.four_struct_array()[1].b().Write(0x22);
   writer.four_struct_array()[2].a().Write(0x31);
   writer.four_struct_array()[2].b().Write(0x32);
   writer.four_struct_array()[3].a().Write(0x41);
   writer.four_struct_array()[3].b().Write(0x42);
   EXPECT_FALSE(writer.four_struct_array()[4].IsComplete());
   writer.dynamic_byte_array()[0].Write(0x50);
   writer.dynamic_byte_array()[1].Write(0x60);
   writer.dynamic_byte_array()[2].Write(0x70);
   EXPECT_FALSE(writer.dynamic_byte_array()[3].IsComplete());
   writer.dynamic_struct_array()[0].a().Write(0x51);
   writer.dynamic_struct_array()[0].b().Write(0x52);
   writer.dynamic_struct_array()[1].a().Write(0x61);
   writer.dynamic_struct_array()[1].b().Write(0x62);
   writer.dynamic_struct_array()[2].a().Write(0x71);
   writer.dynamic_struct_array()[2].b().Write(0x72);
   EXPECT_FALSE(writer.dynamic_struct_array()[3].IsComplete());
   EXPECT_EQ(::std::vector<char>(kAutoSize, kAutoSize + sizeof kAutoSize),
             buffer);
 }

 TEST(AutoSizeView, CanUseDataMethod) {
   auto view = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
       kAutoSize, sizeof kAutoSize);

   for (unsigned i = 0; i < view.SizeInBytes(); ++i) {
     EXPECT_EQ(*(view.BackingStorage().data() + i), kAutoSize[i])
         << " at element " << i;
   }
 }

 TEST(AutoSizeView, CanCopyFrom) {
   auto source = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
       kAutoSize, sizeof kAutoSize);

   ::std::array</**/ ::std::uint8_t, sizeof kAutoSize> buf = {0};
   auto dest =
       MakeAlignedAutoSizeView</**/ ::std::uint8_t, 8>(buf.data(), buf.size());

   // Copy one element.
   EXPECT_NE(source.four_struct_array()[0].a().Read(),
             dest.four_struct_array()[0].a().Read());
   EXPECT_NE(source.four_struct_array()[0].b().Read(),
             dest.four_struct_array()[0].b().Read());
   dest.four_struct_array()[0].CopyFrom(source.four_struct_array()[0]);
   EXPECT_EQ(source.four_struct_array()[0].a().Read(),
             dest.four_struct_array()[0].a().Read());
   EXPECT_EQ(source.four_struct_array()[0].b().Read(),
             dest.four_struct_array()[0].b().Read());

   // Copy entire view.
   dest.CopyFrom(source);
   for (unsigned i = 0; i < source.four_struct_array().ElementCount(); ++i) {
     EXPECT_EQ(source.four_struct_array()[i].a().Read(),
               dest.four_struct_array()[i].a().Read());
     EXPECT_EQ(source.four_struct_array()[i].b().Read(),
               dest.four_struct_array()[i].b().Read());
   }
 }

 TEST(AutoSizeView, CanCopyFromDifferentSizes) {
   constexpr int padding = 10;
   ::std::array</**/ ::std::uint8_t, sizeof kAutoSize + padding> source_buffer;
   memset(source_buffer.data(), 0, source_buffer.size());
   memcpy(source_buffer.data(), kAutoSize, sizeof kAutoSize);
   auto source = MakeAutoSizeView(&source_buffer);

   ::std::array</**/ ::std::uint8_t, sizeof kAutoSize + padding> buf;
   memset(buf.data(), 0xff, buf.size());
   auto dest = MakeAutoSizeView(buf.data(), sizeof kAutoSize);

   dest.CopyFrom(source);
   for (unsigned i = 0; i < sizeof kAutoSize; ++i) {
     EXPECT_EQ(buf[i], source_buffer[i]) << i;
   }
   for (unsigned i = sizeof kAutoSize; i < sizeof kAutoSize + padding; ++i) {
     EXPECT_EQ(buf[i], 0xff) << i;
   }
 }

 TEST(AutoSizeView, CanCopyFromOverlapping) {
   constexpr int kElementSizeBytes = ElementView::SizeInBytes();
   ::std::vector</**/ ::std::uint8_t> buf = {1, 2, 3};

   auto source = MakeElementView(buf.data(), kElementSizeBytes);
   auto dest = MakeElementView(buf.data() + 1, kElementSizeBytes);
   EXPECT_EQ(source.a().Read(), buf[0]);
   EXPECT_EQ(source.b().Read(), dest.a().Read());
   EXPECT_EQ(dest.b().Read(), buf[2]);

   dest.CopyFrom(source);  // Forward overlap.
   EXPECT_EQ(buf, ::std::vector</**/ ::std::uint8_t>({1, 1, 2}));
   source.CopyFrom(dest);  // Reverse overlap.
   EXPECT_EQ(buf, ::std::vector</**/ ::std::uint8_t>({1, 2, 2}));
 }

 TEST(AutoSizeView, Equals) {
   ::std::vector</**/ ::std::uint8_t> buf_x = {1, 2};
   ::std::vector</**/ ::std::uint8_t> buf_y = {1, 2, 3};
   auto x = MakeElementView(&buf_x);
   auto x_const = MakeElementView(
       static_cast<const ::std::vector</**/ ::std::uint8_t>*>(&buf_x));
   auto y = MakeElementView(&buf_y);

   EXPECT_TRUE(x.Equals(x));
   EXPECT_TRUE(x.UncheckedEquals(x));
   EXPECT_TRUE(y.Equals(y));
   EXPECT_TRUE(y.UncheckedEquals(y));

   EXPECT_TRUE(x.Equals(y));
   EXPECT_TRUE(x.UncheckedEquals(y));
   EXPECT_TRUE(y.Equals(x));
   EXPECT_TRUE(y.UncheckedEquals(x));

   EXPECT_TRUE(y.Equals(x_const));
   EXPECT_TRUE(y.UncheckedEquals(x_const));
   EXPECT_TRUE(x_const.Equals(y));
   EXPECT_TRUE(x_const.UncheckedEquals(y));

   ++buf_y[1];
   EXPECT_FALSE(x.Equals(y));
   EXPECT_FALSE(x.UncheckedEquals(y));
   EXPECT_FALSE(y.Equals(x));
   EXPECT_FALSE(y.UncheckedEquals(x));
 }

 }  // namespace
 }  // namespace test
 }  // namespace emboss
	// Copyright 2019 Google LLC
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	// Tests for automatically-sized arrays from auto_array_size.emb.

	#include <stdint.h>

	#include <iterator>
	#include <random>
	#include <vector>

	#include "gmock/gmock.h"
	#include "gtest/gtest.h"
	#include "runtime/cpp/emboss_text_util.h"
	#include "testdata/auto_array_size.emb.h"

	namespace emboss {
	namespace test {
	namespace {

	alignas(8) static const ::std::uint8_t kAutoSize[22] = {
	0x03, // 0:1 array_size == 3
	0x10, 0x20, 0x30, 0x40, // 1:5 four_byte_array
	0x11, 0x12, 0x21, 0x22, // 5:9 four_struct_array[0, 1]
	0x31, 0x32, 0x41, 0x42, // 9:13 four_struct_array[2, 3]
	0x50, 0x60, 0x70, // 13:16 dynamic_byte_array
	0x51, 0x52, 0x61, 0x62, 0x71, 0x72, // 16:22 dynamic_struct_array
	};

	TEST(AutoSizeView, IteratorIncrement) {
	auto src_buf = ::std::vector</**/ ::std::uint8_t>(
	kAutoSize, kAutoSize + sizeof kAutoSize);
	auto src = MakeAutoSizeView(&src_buf).four_struct_array();
	auto dst_buf = ::std::vector</**/ ::std::uint8_t>(
	kAutoSize, kAutoSize + sizeof kAutoSize);
	auto dst = MakeAutoSizeView(&dst_buf).four_struct_array();
	EXPECT_TRUE(src.Equals(dst));

	::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
	EXPECT_FALSE(src.Equals(dst));
	for (auto src_it = src.begin(), dst_it = dst.begin();
	src_it != src.end() && dst_it != dst.end(); ++src_it, ++dst_it) {
	dst_it->CopyFrom(*src_it);
	}
	EXPECT_TRUE(src.Equals(dst));

	::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
	EXPECT_FALSE(src.Equals(dst));
	for (auto src_it = src.begin(), dst_it = dst.begin();
	src_it != src.end() && dst_it != dst.end(); src_it++, dst_it++) {
	dst_it->CopyFrom(*src_it);
	}
	EXPECT_TRUE(src.Equals(dst));

	::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
	EXPECT_FALSE(src.Equals(dst));
	for (auto src_it = src.rbegin(), dst_it = dst.rbegin();
	src_it != src.rend() && dst_it != dst.rend(); ++src_it, ++dst_it) {
	dst_it->CopyFrom(*src_it);
	}
	EXPECT_TRUE(src.Equals(dst));

	::std::fill(dst.BackingStorage().begin(), dst.BackingStorage().end(), 0);
	EXPECT_FALSE(src.Equals(dst));
	for (auto src_it = src.rbegin(), dst_it = dst.rbegin();
	src_it != src.rend() && dst_it != dst.rend(); src_it++, dst_it++) {
	dst_it->CopyFrom(*src_it);
	}
	EXPECT_TRUE(src.Equals(dst));

	EXPECT_EQ(src.begin(), src.begin()++);
	EXPECT_EQ(src.rbegin(), src.rbegin()++);
	EXPECT_EQ(src.end(), (src.end())--);
	EXPECT_EQ(src.rend(), src.rend()--);
	}

	TEST(AutoSizeView, PreviousNext) {
	auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();
	EXPECT_TRUE(::std::next(view.begin(), 0)->Equals(view[0]));
	EXPECT_TRUE(::std::next(view.begin(), 1)->Equals(view[1]));
	EXPECT_TRUE(::std::next(view.begin(), 2)->Equals(view[2]));
	EXPECT_TRUE(::std::next(view.begin(), 3)->Equals(view[3]));

	EXPECT_TRUE(::std::next(view.rbegin(), 0)->Equals(view[3]));
	EXPECT_TRUE(::std::next(view.rbegin(), 1)->Equals(view[2]));
	EXPECT_TRUE(::std::next(view.rbegin(), 2)->Equals(view[1]));
	EXPECT_TRUE(::std::next(view.rbegin(), 3)->Equals(view[0]));

	EXPECT_TRUE(::std::prev(view.end(), 1)->Equals(view[3]));
	EXPECT_TRUE(::std::prev(view.end(), 2)->Equals(view[2]));
	EXPECT_TRUE(::std::prev(view.end(), 3)->Equals(view[1]));
	EXPECT_TRUE(::std::prev(view.end(), 4)->Equals(view[0]));

	EXPECT_TRUE(::std::prev(view.rend(), 1)->Equals(view[0]));
	EXPECT_TRUE(::std::prev(view.rend(), 2)->Equals(view[1]));
	EXPECT_TRUE(::std::prev(view.rend(), 3)->Equals(view[2]));
	EXPECT_TRUE(::std::prev(view.rend(), 4)->Equals(view[3]));
	}

	TEST(AutoSizeView, ForEach) {
	auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

	int i = 0;
	::std::for_each(view.begin(), view.end(), [&](ElementView element) {
	ASSERT_TRUE(element.Equals(view[i++]));
	});

	i = view.ElementCount() - 1;
	::std::for_each(view.rbegin(), view.rend(), [&](ElementView element) {
	ASSERT_TRUE(element.Equals(view[i--]));
	});
	}

	TEST(AutoSizeView, Find) {
	auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

	EXPECT_TRUE(
	::std::find_if(view.begin(), view.end(), [view](ElementView element) {
	return element.Equals(view[0]);
	})->Equals(view[0]));
	EXPECT_TRUE(
	::std::find_if(view.begin(), view.end(), [view](ElementView element) {
	return element.Equals(view[1]);
	})->Equals(view[1]));
	EXPECT_TRUE(
	::std::find_if(view.begin(), view.end(), [view](ElementView element) {
	return element.Equals(view[2]);
	})->Equals(view[2]));
	EXPECT_TRUE(
	::std::find_if(view.begin(), view.end(), [view](ElementView element) {
	return element.Equals(view[3]);
	})->Equals(view[3]));

	EXPECT_TRUE(
	::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
	return element.Equals(view[0]);
	})->Equals(view[0]));
	EXPECT_TRUE(
	::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
	return element.Equals(view[1]);
	})->Equals(view[1]));
	EXPECT_TRUE(
	::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
	return element.Equals(view[2]);
	})->Equals(view[2]));
	EXPECT_TRUE(
	::std::find_if(view.rbegin(), view.rend(), [view](ElementView element) {
	return element.Equals(view[3]);
	})->Equals(view[3]));
	}

	TEST(AutoSizeView, Comparison) {
	auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

	EXPECT_EQ(view.begin() + view.ElementCount(), view.end());
	EXPECT_EQ(view.end() - view.ElementCount(), view.begin());

	EXPECT_EQ(view.rbegin() + view.ElementCount(), view.rend());
	EXPECT_EQ(view.rend() - view.ElementCount(), view.rbegin());

	EXPECT_LT(view.begin(), view.end());
	EXPECT_LT(view.rbegin(), view.rend());

	EXPECT_LE(view.begin() - 1, view.end());
	EXPECT_LE(view.rbegin() - 1, view.rend());
	EXPECT_LE(view.begin() - 1, view.end());
	EXPECT_LE(view.rbegin() - 1, view.rend());

	EXPECT_GT(view.end(), view.begin());
	EXPECT_GT(view.rend(), view.rbegin());

	EXPECT_GE(view.end() + 1, view.begin());
	EXPECT_GE(view.end() + 1, view.begin());
	EXPECT_GE(view.rend() + 1, view.rbegin());
	EXPECT_GE(view.rend() + 1, view.rbegin());
	}

	TEST(AutoSizeView, RangeBasedFor) {
	auto view = MakeAutoSizeView(kAutoSize, sizeof kAutoSize).four_struct_array();

	int i = 0;
	for (auto element : view) {
	ASSERT_TRUE(element.Equals(view[i++]));
	}
	}

	TEST(AutoSizeView, CanReadAutoArrays) {
	auto view = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
	kAutoSize, sizeof kAutoSize);
	EXPECT_EQ(22U, view.SizeInBytes());
	EXPECT_EQ(3U, view.array_size().Read());
	EXPECT_EQ(0x10U, view.four_byte_array()[0].Read());
	EXPECT_EQ(0x20U, view.four_byte_array()[1].Read());
	EXPECT_EQ(0x30U, view.four_byte_array()[2].Read());
	EXPECT_EQ(0x40U, view.four_byte_array()[3].Read());
	EXPECT_EQ(4U, view.four_byte_array().SizeInBytes());
	EXPECT_DEATH(view.four_byte_array()[4].Read(), "");
	EXPECT_EQ(0x11U, view.four_struct_array()[0].a().Read());
	EXPECT_EQ(0x12U, view.four_struct_array()[0].b().Read());
	EXPECT_EQ(0x21U, view.four_struct_array()[1].a().Read());
	EXPECT_EQ(0x22U, view.four_struct_array()[1].b().Read());
	EXPECT_EQ(0x31U, view.four_struct_array()[2].a().Read());
	EXPECT_EQ(0x32U, view.four_struct_array()[2].b().Read());
	EXPECT_EQ(0x41U, view.four_struct_array()[3].a().Read());
	EXPECT_EQ(0x42U, view.four_struct_array()[3].b().Read());
	EXPECT_EQ(8U, view.four_struct_array().SizeInBytes());
	EXPECT_DEATH(view.four_struct_array()[4].a().Read(), "");
	EXPECT_EQ(0x50U, view.dynamic_byte_array()[0].Read());
	EXPECT_EQ(0x60U, view.dynamic_byte_array()[1].Read());
	EXPECT_EQ(0x70U, view.dynamic_byte_array()[2].Read());
	EXPECT_EQ(3U, view.dynamic_byte_array().SizeInBytes());
	EXPECT_FALSE(view.dynamic_byte_array()[3].IsComplete());
	EXPECT_EQ(0x51U, view.dynamic_struct_array()[0].a().Read());
	EXPECT_EQ(0x52U, view.dynamic_struct_array()[0].b().Read());
	EXPECT_EQ(0x61U, view.dynamic_struct_array()[1].a().Read());
	EXPECT_EQ(0x62U, view.dynamic_struct_array()[1].b().Read());
	EXPECT_EQ(0x71U, view.dynamic_struct_array()[2].a().Read());
	EXPECT_EQ(0x72U, view.dynamic_struct_array()[2].b().Read());
	EXPECT_EQ(6U, view.dynamic_struct_array().SizeInBytes());
	EXPECT_FALSE(view.dynamic_struct_array()[3].IsComplete());
	}

	TEST(AutoSizeWriter, CanWriteAutoArrays) {
	::std::vector<char> buffer(sizeof kAutoSize, 0);
	auto writer = MakeAutoSizeView(&buffer);
	writer.array_size().Write(0);
	EXPECT_EQ(13U, writer.SizeInBytes());
	EXPECT_DEATH(writer.dynamic_byte_array()[0].Read(), "");
	writer.array_size().Write(3);
	EXPECT_EQ(22U, writer.SizeInBytes());
	writer.four_byte_array()[0].Write(0x10);
	writer.four_byte_array()[1].Write(0x20);
	writer.four_byte_array()[2].Write(0x30);
	writer.four_byte_array()[3].Write(0x40);
	EXPECT_DEATH(writer.four_byte_array()[4].Write(0), "");
	writer.four_struct_array()[0].a().Write(0x11);
	writer.four_struct_array()[0].b().Write(0x12);
	writer.four_struct_array()[1].a().Write(0x21);
	writer.four_struct_array()[1].b().Write(0x22);
	writer.four_struct_array()[2].a().Write(0x31);
	writer.four_struct_array()[2].b().Write(0x32);
	writer.four_struct_array()[3].a().Write(0x41);
	writer.four_struct_array()[3].b().Write(0x42);
	EXPECT_FALSE(writer.four_struct_array()[4].IsComplete());
	writer.dynamic_byte_array()[0].Write(0x50);
	writer.dynamic_byte_array()[1].Write(0x60);
	writer.dynamic_byte_array()[2].Write(0x70);
	EXPECT_FALSE(writer.dynamic_byte_array()[3].IsComplete());
	writer.dynamic_struct_array()[0].a().Write(0x51);
	writer.dynamic_struct_array()[0].b().Write(0x52);
	writer.dynamic_struct_array()[1].a().Write(0x61);
	writer.dynamic_struct_array()[1].b().Write(0x62);
	writer.dynamic_struct_array()[2].a().Write(0x71);
	writer.dynamic_struct_array()[2].b().Write(0x72);
	EXPECT_FALSE(writer.dynamic_struct_array()[3].IsComplete());
	EXPECT_EQ(::std::vector<char>(kAutoSize, kAutoSize + sizeof kAutoSize),
	buffer);
	}

	TEST(AutoSizeView, CanUseDataMethod) {
	auto view = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
	kAutoSize, sizeof kAutoSize);

	for (unsigned i = 0; i < view.SizeInBytes(); ++i) {
	EXPECT_EQ(*(view.BackingStorage().data() + i), kAutoSize[i])
	<< " at element " << i;
	}
	}

	TEST(AutoSizeView, CanCopyFrom) {
	auto source = MakeAlignedAutoSizeView<const ::std::uint8_t, 8>(
	kAutoSize, sizeof kAutoSize);

	::std::array</**/ ::std::uint8_t, sizeof kAutoSize> buf = {0};
	auto dest =
	MakeAlignedAutoSizeView</**/ ::std::uint8_t, 8>(buf.data(), buf.size());

	// Copy one element.
	EXPECT_NE(source.four_struct_array()[0].a().Read(),
	dest.four_struct_array()[0].a().Read());
	EXPECT_NE(source.four_struct_array()[0].b().Read(),
	dest.four_struct_array()[0].b().Read());
	dest.four_struct_array()[0].CopyFrom(source.four_struct_array()[0]);
	EXPECT_EQ(source.four_struct_array()[0].a().Read(),
	dest.four_struct_array()[0].a().Read());
	EXPECT_EQ(source.four_struct_array()[0].b().Read(),
	dest.four_struct_array()[0].b().Read());

	// Copy entire view.
	dest.CopyFrom(source);
	for (unsigned i = 0; i < source.four_struct_array().ElementCount(); ++i) {
	EXPECT_EQ(source.four_struct_array()[i].a().Read(),
	dest.four_struct_array()[i].a().Read());
	EXPECT_EQ(source.four_struct_array()[i].b().Read(),
	dest.four_struct_array()[i].b().Read());
	}
	}

	TEST(AutoSizeView, CanCopyFromDifferentSizes) {
	constexpr int padding = 10;
	::std::array</**/ ::std::uint8_t, sizeof kAutoSize + padding> source_buffer;
	memset(source_buffer.data(), 0, source_buffer.size());
	memcpy(source_buffer.data(), kAutoSize, sizeof kAutoSize);
	auto source = MakeAutoSizeView(&source_buffer);

	::std::array</**/ ::std::uint8_t, sizeof kAutoSize + padding> buf;
	memset(buf.data(), 0xff, buf.size());
	auto dest = MakeAutoSizeView(buf.data(), sizeof kAutoSize);

	dest.CopyFrom(source);
	for (unsigned i = 0; i < sizeof kAutoSize; ++i) {
	EXPECT_EQ(buf[i], source_buffer[i]) << i;
	}
	for (unsigned i = sizeof kAutoSize; i < sizeof kAutoSize + padding; ++i) {
	EXPECT_EQ(buf[i], 0xff) << i;
	}
	}

	TEST(AutoSizeView, CanCopyFromOverlapping) {
	constexpr int kElementSizeBytes = ElementView::SizeInBytes();
	::std::vector</**/ ::std::uint8_t> buf = {1, 2, 3};

	auto source = MakeElementView(buf.data(), kElementSizeBytes);
	auto dest = MakeElementView(buf.data() + 1, kElementSizeBytes);
	EXPECT_EQ(source.a().Read(), buf[0]);
	EXPECT_EQ(source.b().Read(), dest.a().Read());
	EXPECT_EQ(dest.b().Read(), buf[2]);

	dest.CopyFrom(source); // Forward overlap.
	EXPECT_EQ(buf, ::std::vector</**/ ::std::uint8_t>({1, 1, 2}));
	source.CopyFrom(dest); // Reverse overlap.
	EXPECT_EQ(buf, ::std::vector</**/ ::std::uint8_t>({1, 2, 2}));
	}

	TEST(AutoSizeView, Equals) {
	::std::vector</**/ ::std::uint8_t> buf_x = {1, 2};
	::std::vector</**/ ::std::uint8_t> buf_y = {1, 2, 3};
	auto x = MakeElementView(&buf_x);
	auto x_const = MakeElementView(
	static_cast<const ::std::vector</*/ ::std::uint8_t>>(&buf_x));
	auto y = MakeElementView(&buf_y);

	EXPECT_TRUE(x.Equals(x));
	EXPECT_TRUE(x.UncheckedEquals(x));
	EXPECT_TRUE(y.Equals(y));
	EXPECT_TRUE(y.UncheckedEquals(y));

	EXPECT_TRUE(x.Equals(y));
	EXPECT_TRUE(x.UncheckedEquals(y));
	EXPECT_TRUE(y.Equals(x));
	EXPECT_TRUE(y.UncheckedEquals(x));

	EXPECT_TRUE(y.Equals(x_const));
	EXPECT_TRUE(y.UncheckedEquals(x_const));
	EXPECT_TRUE(x_const.Equals(y));
	EXPECT_TRUE(x_const.UncheckedEquals(y));

	++buf_y[1];
	EXPECT_FALSE(x.Equals(y));
	EXPECT_FALSE(x.UncheckedEquals(y));
	EXPECT_FALSE(y.Equals(x));
	EXPECT_FALSE(y.UncheckedEquals(x));
	}

	} // namespace
	} // namespace test
	} // namespace emboss