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#include "catch.hpp"
#include <osmium/memory/buffer.hpp>
#include <array>
#include <stdexcept>
TEST_CASE("Buffer basics") {
osmium::memory::Buffer invalid_buffer1;
const osmium::memory::Buffer invalid_buffer2;
osmium::memory::Buffer empty_buffer1{1024};
osmium::memory::Buffer empty_buffer2{2048};
REQUIRE_FALSE(invalid_buffer1);
REQUIRE_FALSE(invalid_buffer2);
REQUIRE(empty_buffer1);
REQUIRE(empty_buffer2);
REQUIRE(invalid_buffer1 == invalid_buffer2);
REQUIRE(invalid_buffer1 != empty_buffer1);
REQUIRE(empty_buffer1 != empty_buffer2);
REQUIRE(invalid_buffer1.capacity() == 0);
REQUIRE(invalid_buffer1.written() == 0);
REQUIRE(invalid_buffer1.committed() == 0);
REQUIRE(invalid_buffer1.clear() == 0);
REQUIRE(empty_buffer1.capacity() == 1024);
REQUIRE(empty_buffer1.written() == 0);
REQUIRE(empty_buffer1.committed() == 0);
REQUIRE(empty_buffer1.is_aligned());
REQUIRE(empty_buffer1.clear() == 0);
REQUIRE(empty_buffer2.capacity() == 2048);
REQUIRE(empty_buffer2.written() == 0);
REQUIRE(empty_buffer2.committed() == 0);
REQUIRE(empty_buffer2.is_aligned());
REQUIRE(empty_buffer2.clear() == 0);
}
TEST_CASE("Buffer with zero size") {
const osmium::memory::Buffer buffer{0};
REQUIRE(buffer.capacity() == 64);
}
TEST_CASE("Buffer with less than minimum size") {
const osmium::memory::Buffer buffer{63};
REQUIRE(buffer.capacity() == 64);
}
TEST_CASE("Buffer with minimum size") {
const osmium::memory::Buffer buffer{64};
REQUIRE(buffer.capacity() == 64);
}
TEST_CASE("Buffer with non-aligned size") {
const osmium::memory::Buffer buffer{65};
REQUIRE(buffer.capacity() > 65);
}
TEST_CASE("Grow a buffer") {
osmium::memory::Buffer buffer{128};
REQUIRE(buffer.capacity() == 128);
buffer.grow(256);
REQUIRE(buffer.capacity() == 256);
buffer.grow(257);
REQUIRE(buffer.capacity() > 256);
REQUIRE(buffer.committed() == 0);
REQUIRE(buffer.written() == 0);
REQUIRE(buffer.is_aligned());
}
TEST_CASE("Reserve space in a non-growing buffer") {
osmium::memory::Buffer buffer{128, osmium::memory::Buffer::auto_grow::no};
REQUIRE(buffer.reserve_space(20) != nullptr);
REQUIRE(buffer.written() == 20);
REQUIRE_THROWS_AS(buffer.reserve_space(1000), osmium::buffer_is_full);
}
TEST_CASE("Reserve space in a growing buffer") {
osmium::memory::Buffer buffer{128, osmium::memory::Buffer::auto_grow::yes};
REQUIRE(buffer.reserve_space(20) != nullptr);
REQUIRE(buffer.written() == 20);
REQUIRE(buffer.reserve_space(1000) != nullptr);
REQUIRE(buffer.written() == 1020);
}
TEST_CASE("Create buffer from existing data with good alignment works") {
std::array<unsigned char, 128> data = {{0}};
const osmium::memory::Buffer buffer{data.data(), data.size()};
REQUIRE(buffer.capacity() == 128);
REQUIRE(buffer.committed() == 128);
}
TEST_CASE("Create buffer from existing data with good alignment and committed value works") {
std::array<unsigned char, 128> data = {{0}};
const osmium::memory::Buffer buffer{data.data(), data.size(), 32};
REQUIRE(buffer.capacity() == 128);
REQUIRE(buffer.committed() == 32);
REQUIRE(buffer.written() == 32);
}
TEST_CASE("Create buffer from existing data with bad alignment fails") {
std::array<unsigned char, 128> data = {{0}};
const auto l1 = [&](){
const osmium::memory::Buffer buffer{data.data(), 127};
};
const auto l2 = [&](){
const osmium::memory::Buffer buffer{data.data(), 127, 120};
};
const auto l3 = [&](){
const osmium::memory::Buffer buffer{data.data(), 128, 127};
};
const auto l4 = [&](){
const osmium::memory::Buffer buffer{data.data(), 32, 128};
};
REQUIRE_THROWS_AS(l1(), std::invalid_argument);
REQUIRE_THROWS_AS(l2(), std::invalid_argument);
REQUIRE_THROWS_AS(l3(), std::invalid_argument);
REQUIRE_THROWS_AS(l4(), std::invalid_argument);
}
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