shared-buffer/test/shared_buffer_test.cpp at develop · connectivecpp/shared-buffer · GitHub

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/** @file

* @brief Test scenarios for @c mutable_shared_buffer and

* @c const_shared_buffer classes.

* @author Cliff Green

* Distributed under the Boost Software License, Version 1.0.

* (See accompanying file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include "catch2/catch_test_macros.hpp"

#include "catch2/catch_template_test_macros.hpp"

#include <cstddef> // std::byte

#include <list>

#include <string_view>

#include <span>

#include <array>

#include <algorithm> // std::copy

#include <bit> // std::bit_cast

#include <ranges> // std::views::iota

#include "buffer/shared_buffer.hpp"

#include "utility/byte_array.hpp"

constexpr std::size_t test_data_size { 12u };

using test_data_type = std::array<std::byte, test_data_size>;

constexpr test_data_type test_data { chops::make_byte_array( 40, 41, 42, 43, 44, 60, 59, 58, 57, 56, 42, 42 ) };

char test_data_char[test_data_size] { 40, 41, 42, 43, 44, 60, 59, 58, 57, 56, 42, 42 };

const char* test_data_char_ptr {test_data_char};

template <typename SB>

bool check_sb_against_test_data(SB sb) {

REQUIRE (sb.size() == test_data_size);

test_data_type buf;

std::copy(sb.data(), sb.data()+sb.size(), buf.begin());

return chops::compare_byte_arrays(buf, test_data);

}

template <typename SB, typename PT>

SB generic_pointer_construction_test(const PT * ptr) {

SB sb(ptr, test_data_size);

REQUIRE_FALSE (sb.empty());

REQUIRE (check_sb_against_test_data(sb));

return sb;

}

template <typename PT>

void generic_pointer_append_test(const PT * ptr) {

auto sb { generic_pointer_construction_test<chops::mutable_shared_buffer>(ptr) };

auto sav_sz { sb.size() };

const PT arr[] { 5, 6, 7 };

const PT* ptr_arr { arr };

sb.append (ptr_arr, 3);

REQUIRE (sb.size() == (sav_sz + 3));

std::span<const PT, 3> sp { arr };

sb.append (sp);

REQUIRE (sb.size() == (sav_sz + 6));

}

template <typename SB>

void check_sb(SB sb) {

REQUIRE_FALSE (sb.empty());

REQUIRE (sb.size() == test_data_size);

REQUIRE (check_sb_against_test_data(sb));

}

template <typename SB>

void common_ctor_test() {

{

std::span<const std::byte, test_data_size> sp { test_data };

SB sb{sp};

check_sb(sb);

}

{

std::span<const std::byte> sp { test_data.data(), test_data.size() };

SB sb{sp};

check_sb(sb);

}

{

SB sb{test_data.data(), test_data.size()};

check_sb(sb);

}

{

std::span<const char, test_data_size> sp { test_data_char };

SB sb{sp};

check_sb(sb);

}

{

std::span<const char> sp { test_data_char, test_data_char+test_data_size };

SB sb{sp};

check_sb(sb);

}

{

SB sb{test_data_char_ptr, test_data_size};

check_sb(sb);

}

{

std::list<std::byte> lst {test_data.cbegin(), test_data.cend()};

SB sb {lst.cbegin(), lst.cend()};

check_sb(sb);

}

{

SB sb1{test_data.data(), test_data.size()};

SB sb2{test_data.data(), test_data.size()};

REQUIRE (sb1 == sb2);

}

{

SB sb1{test_data.data(), test_data.size()};

SB sb2{sb1};

REQUIRE (sb1 == sb2);

}

template <typename SB>

void common_comparison_test() {

auto ba1 { chops::make_byte_array(0x00, 0x00, 0x00) };

auto ba2 { chops::make_byte_array(0x00, 0x22, 0x33) };

SB sb1(ba1.cbegin(), ba1.cend());

SB sb2(ba2.cbegin(), ba2.cend());

REQUIRE_FALSE (sb1.empty());

REQUIRE_FALSE (sb2.empty());

REQUIRE_FALSE (sb1 == sb2);

REQUIRE (((sb1 < sb2) != 0)); // uses spaceship operator

}

template <typename SB>

void byte_vector_move_test() {

auto arr { chops::make_byte_array (0x01, 0x02, 0x03, 0x04, 0x05) };

std::vector<std::byte> bv { arr.cbegin(), arr.cend() };

SB sb(std::move(bv));

REQUIRE (sb == SB(arr.cbegin(), arr.cend()));

REQUIRE_FALSE (bv.size() == sb.size());

}

TEMPLATE_TEST_CASE ( "Generic pointer construction",

"[common]",

char, unsigned char, signed char, std::uint8_t ) {

const TestType* ptr { std::bit_cast<const TestType *>(test_data.data()) };

generic_pointer_construction_test<chops::mutable_shared_buffer>(ptr);

generic_pointer_construction_test<chops::const_shared_buffer>(ptr);

}

TEST_CASE ( "Void pointer construction",

"[common]" ) {

auto ptr { static_cast<const void *>(test_data.data()) };

generic_pointer_construction_test<chops::mutable_shared_buffer>(ptr);

generic_pointer_construction_test<chops::const_shared_buffer>(ptr);

}

TEMPLATE_TEST_CASE ( "Shared buffer common ctor methods",

"[const_shared_buffer] [mutable_shared_buffer] [common]",

chops::mutable_shared_buffer, chops::const_shared_buffer ) {

common_ctor_test<TestType>();

}

TEMPLATE_TEST_CASE ( "Shared buffer common comparison methods",

"[const_shared_buffer] [mutable_shared_buffer] [common]",

chops::mutable_shared_buffer, chops::const_shared_buffer ) {

common_comparison_test<TestType>();

}

TEST_CASE ( "Mutable shared buffer copy construction and assignment",

"[mutable_shared_buffer] [copy]" ) {

constexpr std::byte Harhar { 42 };

auto arr { chops::make_byte_array ( 80, 81, 82, 83, 84, 90, 91, 92 ) };

chops::mutable_shared_buffer sb;

REQUIRE (sb.empty());

SECTION ("Assign mutable shared buffer into default constructed mutable shared buffer") {

chops::mutable_shared_buffer sb2(arr.cbegin(), arr.cend());

sb = sb2;

REQUIRE (sb.size() == arr.size());

REQUIRE (sb == sb2);

}

SECTION ("Assign mutable shared buffer, then copy construct") {

sb = chops::mutable_shared_buffer(arr.cbegin(), arr.cend());

chops::mutable_shared_buffer sb2(sb);

REQUIRE (sb == sb2);

*(sb.data()+0) = Harhar;

*(sb.data()+1) = Harhar;

REQUIRE (sb == sb2);

}

TEST_CASE ( "Mutable shared buffer resize and clear",

"[mutable_shared_buffer] [resize_and_clear]" ) {

constexpr int N = 11;

chops::mutable_shared_buffer sb;

REQUIRE (sb.empty());

REQUIRE (sb.size() == 0);

sb.resize(N);

REQUIRE (sb.size() == N);

for (int i : std::views::iota(0, N)) {

REQUIRE (std::to_integer<int>(*(sb.data() + i)) == 0 );

}

SECTION ( "Compare two resized mutable shared buffer with same size" ) {

chops::mutable_shared_buffer sb2(N);

REQUIRE (sb == sb2);

for (int i : std::views::iota(0, N)) {

REQUIRE (std::to_integer<int>(*(sb.data() + i)) == 0 );

REQUIRE (std::to_integer<int>(*(sb2.data() + i)) == 0 );

}

SECTION ( "Clear, check size" ) {

sb.clear();

REQUIRE (sb.size() == 0);

REQUIRE (sb.empty());

}

TEST_CASE ( "Mutable shared buffer swap",

"[mutable_shared_buffer] [swap]" ) {

auto arr1 = chops::make_byte_array (0xaa, 0xbb, 0xcc);

auto arr2 = chops::make_byte_array (0x01, 0x02, 0x03, 0x04, 0x05);

chops::mutable_shared_buffer sb1(arr1.cbegin(), arr1.cend());

chops::mutable_shared_buffer sb2(arr2.cbegin(), arr2.cend());

chops::swap(sb1, sb2);

REQUIRE (sb1.size() == arr2.size());

REQUIRE (sb2.size() == arr1.size());

REQUIRE (std::to_integer<int>(*(sb1.data()+0)) == std::to_integer<int>(*(arr2.data()+0)));

REQUIRE (std::to_integer<int>(*(sb1.data()+1)) == std::to_integer<int>(*(arr2.data()+1)));

REQUIRE (std::to_integer<int>(*(sb1.data()+2)) == std::to_integer<int>(*(arr2.data()+2)));

REQUIRE (std::to_integer<int>(*(sb1.data()+3)) == std::to_integer<int>(*(arr2.data()+3)));

REQUIRE (std::to_integer<int>(*(sb1.data()+4)) == std::to_integer<int>(*(arr2.data()+4)));

REQUIRE (std::to_integer<int>(*(sb2.data()+0)) == std::to_integer<int>(*(arr1.data()+0)));

REQUIRE (std::to_integer<int>(*(sb2.data()+1)) == std::to_integer<int>(*(arr1.data()+1)));

REQUIRE (std::to_integer<int>(*(sb2.data()+2)) == std::to_integer<int>(*(arr1.data()+2)));

}

TEST_CASE ( "Mutable shared buffer append",

"[mutable_shared_buffer] [append]" ) {

auto arr = chops::make_byte_array (0xaa, 0xbb, 0xcc);

auto arr2 = chops::make_byte_array (0xaa, 0xbb, 0xcc, 0xaa, 0xbb, 0xcc);

chops::mutable_shared_buffer ta(arr.cbegin(), arr.cend());

chops::mutable_shared_buffer ta2(arr2.cbegin(), arr2.cend());

chops::mutable_shared_buffer sb;

REQUIRE (sb.empty());

SECTION ( "Append array to default constructed mutable shared_buffer" ) {

sb.append(arr.data(), arr.size());

REQUIRE (sb == ta);

}

SECTION ( "Append mutable shared buffer" ) {

sb.append(ta);

REQUIRE (sb == ta);

}

SECTION ( "Call append twice" ) {

sb.append(ta);

REQUIRE (sb == ta2);

}

SECTION ( "Append with single byte" ) {

sb.append(std::byte(0xaa));

sb.append(std::byte(0xbb));

sb += std::byte(0xcc);

REQUIRE (sb == ta);

}

SECTION ( "Append with templated append" ) {

std::string_view sv("Haha, Bro!");

chops::mutable_shared_buffer cb(sv.data(), sv.size());

sb.append(sv.data(), sv.size());

REQUIRE (sb == cb);

}

SECTION ( "Append with void pointer" ) {

std::string_view sv("Haha, Bro!");

const void* ptr { static_cast<const void*>(sv.data()) };

chops::mutable_shared_buffer cb(sv.data(), sv.size());

sb.append(ptr, sv.size());

REQUIRE (sb == cb);

}

TEMPLATE_TEST_CASE ( "Generic pointer append",

"[mutable_shared_buffer] [pointer] [append]",

char, unsigned char, signed char, std::uint8_t ) {

const TestType* ptr { std::bit_cast<const TestType *>(test_data.data()) };

generic_pointer_append_test<TestType>(ptr);

}

TEST_CASE ( "Compare a mutable shared_buffer with a const shared buffer",

"[mutable_shared_buffer] [const_shared_buffer] [compare]" ) {

auto arr = chops::make_byte_array (0xaa, 0xbb, 0xcc);

chops::mutable_shared_buffer msb(arr.cbegin(), arr.cend());

chops::const_shared_buffer csb(arr.cbegin(), arr.cend());

REQUIRE (msb == csb);

REQUIRE (csb == msb);

}

TEST_CASE ( "Mutable shared buffer move into const shared buffer",

"[mutable_shared_buffer] [const_shared_buffer] [move]" ) {

auto arr1 = chops::make_byte_array (0xaa, 0xbb, 0xcc);

auto arr2 = chops::make_byte_array (0x01, 0x02, 0x03, 0x04, 0x05);

chops::mutable_shared_buffer msb(arr1.cbegin(), arr1.cend());

chops::const_shared_buffer csb(std::move(msb));

REQUIRE (csb == chops::const_shared_buffer(arr1.cbegin(), arr1.cend()));

REQUIRE_FALSE (msb == csb);

msb.clear();

msb.resize(arr2.size());

msb.append(arr2.data(), arr2.size());

REQUIRE_FALSE (msb == csb);

}

TEMPLATE_TEST_CASE ( "Move a vector of bytes into a shared buffer",

"[common] [move_byte_vec]",

chops::mutable_shared_buffer, chops::const_shared_buffer ) {

byte_vector_move_test<TestType>();

}

TEST_CASE ( "Use get_byte_vec for external modification of buffer",

"[mutable_shared_buffer] [get_byte_vec]" ) {

auto arr = chops::make_byte_array (0xaa, 0xbb, 0xcc);

chops::mutable_shared_buffer::byte_vec bv (arr.cbegin(), arr.cend());

chops::mutable_shared_buffer msb(bv.cbegin(), bv.cend());

auto r = msb.get_byte_vec();

// REQUIRE (r == bv); // Catch2 build problems on MSVC

std::array<std::byte, 3> arr2 { r[0], r[1], r[2] };

REQUIRE (chops::compare_byte_arrays(arr, arr2));

r[0] = std::byte(0xdd);

// REQUIRE_FALSE (r == bv); // Catch2 build problems on MSVC

std::array<std::byte, 3> arr3 { r[0], r[1], r[2] };

REQUIRE_FALSE (chops::compare_byte_arrays(arr, arr3));

}

shared-buffer/test/shared_buffer_test.cpp at develop · connectivecpp/shared-buffer · GitHub

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