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transmission/tests/libtransmission/block-info-test.cc
Charles Kerr 56837517b0
refactor: tr_block_info cleanup (#6342) 
* refactor: make tr_block_info::init_sizes() private

* refactor: remove unuse tr_file_piece_map::empty()

* refactor: remove tr_file_priorities::reset()

* refactor: remove tr_files_wanted::reset()

* refactor: rename method to tr_file_piece_map::piece_span_for_file()

more consistent naming with tr_block_info

* refactor: rename method to tr_file_piece_map::file_span_for_piece()

more consistent naming with tr_block_info

* refactor: use standard class field order in tr_block_info

* refactor: move CompareToSpan from header to cc file

* refactor: make tr_file_piece_map::reset() private

* refactor: rename method to tr_file_piece_map::file_count()

* refactor: rename method to tr_file_piece_map::byte_span_for_file()

* refactor: constify tr_block_info function args

* refactor: fix more signed vs unsigned
2023-12-05 22:06:27 -06:00

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// This file Copyright (C) 2021-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <cstdint>
#include <libtransmission/transmission.h>
#include <libtransmission/block-info.h>
#include "gtest/gtest.h"
using BlockInfoTest = ::testing::Test;
TEST_F(BlockInfoTest, fieldsAreSet)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024 } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 4U };
static auto constexpr TotalSize = PieceSize * PieceCount;
auto info = tr_block_info{ TotalSize, PieceSize };
EXPECT_EQ(ExpectedBlockSize, info.block_size(info.block_count() - 1));
EXPECT_EQ(PieceCount, info.piece_count());
EXPECT_EQ(PieceSize, info.piece_size(info.piece_count() - 1));
EXPECT_EQ(PieceSize, info.piece_size());
EXPECT_EQ(TotalSize, info.total_size());
info = tr_block_info{ 0U, 0U };
EXPECT_EQ(0U, info.block_size(info.block_count() - 1));
EXPECT_EQ(0U, info.piece_count());
EXPECT_EQ(0U, info.piece_size(info.piece_count() - 1));
EXPECT_EQ(0U, info.piece_size());
EXPECT_EQ(0U, info.total_size());
}
TEST_F(BlockInfoTest, handlesOddSize)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto const info = tr_block_info{ TotalSize, PieceSize };
EXPECT_EQ(1U, info.block_size(info.block_count() - 1));
EXPECT_EQ(1U, info.piece_size(info.piece_count() - 1));
EXPECT_EQ(PieceCount, info.piece_count());
EXPECT_EQ(PieceSize, info.piece_size());
EXPECT_EQ(TotalSize, info.total_size());
}
TEST_F(BlockInfoTest, pieceSize)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto const info = tr_block_info{ TotalSize, PieceSize };
EXPECT_EQ(PieceSize, info.piece_size(info.piece_count() - 2));
EXPECT_EQ(1U, info.piece_size(info.piece_count() - 1));
}
TEST_F(BlockInfoTest, blockSize)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1) + 1;
auto const info = tr_block_info{ TotalSize, PieceSize };
EXPECT_EQ(ExpectedBlockSize, info.block_size(info.block_count() - 2));
EXPECT_EQ(1U, info.block_size(info.block_count() - 1));
}
TEST_F(BlockInfoTest, blockSpanForPiece)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto info = tr_block_info{ TotalSize, PieceSize };
EXPECT_EQ(0U, info.block_span_for_piece(0).begin);
EXPECT_EQ(4U, info.block_span_for_piece(0).end);
EXPECT_EQ(12U, info.block_span_for_piece(3).begin);
EXPECT_EQ(16U, info.block_span_for_piece(3).end);
EXPECT_EQ(16U, info.block_span_for_piece(4).begin);
EXPECT_EQ(17U, info.block_span_for_piece(4).end);
// test that uninitialized block_info returns an invalid span
info = tr_block_info{};
EXPECT_EQ(0U, info.block_span_for_piece(0).begin);
EXPECT_EQ(0U, info.block_span_for_piece(0).end);
}
TEST_F(BlockInfoTest, blockLoc)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto const info = tr_block_info{ TotalSize, PieceSize };
// begin
auto loc = info.block_loc(0);
EXPECT_EQ(tr_block_info::Location{}, loc);
// third block is halfway through the first piece
loc = info.block_loc(2);
EXPECT_EQ(ExpectedBlockSize * 2U, loc.byte);
EXPECT_EQ(2U, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(ExpectedBlockSize * 2U, loc.piece_offset);
// second piece aligns with fifth block
loc = info.block_loc(4);
EXPECT_EQ(PieceSize, loc.byte);
EXPECT_EQ(4U, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(1U, loc.piece);
EXPECT_EQ(0U, loc.piece_offset);
}
TEST_F(BlockInfoTest, pieceLoc)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto const info = tr_block_info{ TotalSize, PieceSize };
// begin
auto loc = info.piece_loc(0);
EXPECT_EQ(tr_block_info::Location{}, loc);
for (uint64_t i = 0; i < PieceCount; ++i)
{
loc = info.piece_loc(i);
EXPECT_EQ(info.block_loc(i * ExpectedBlocksPerPiece), loc);
EXPECT_EQ(PieceSize * i, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece * i, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(i, loc.piece);
EXPECT_EQ(0U, loc.piece_offset);
}
loc = info.piece_loc(0, PieceSize - 1);
EXPECT_EQ(PieceSize - 1, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece - 1, loc.block);
EXPECT_EQ(ExpectedBlockSize - 1, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(PieceSize - 1, loc.piece_offset);
loc = info.piece_loc(0, PieceSize);
EXPECT_EQ(PieceSize, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(1U, loc.piece);
EXPECT_EQ(0U, loc.piece_offset);
loc = info.piece_loc(0, PieceSize + 1);
EXPECT_EQ(PieceSize + 1, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece, loc.block);
EXPECT_EQ(1U, loc.block_offset);
EXPECT_EQ(1U, loc.piece);
EXPECT_EQ(1U, loc.piece_offset);
}
TEST_F(BlockInfoTest, byteLoc)
{
static auto constexpr ExpectedBlockSize = uint64_t{ 1024U } * 16U;
static auto constexpr ExpectedBlocksPerPiece = uint64_t{ 4U };
static auto constexpr PieceSize = ExpectedBlockSize * ExpectedBlocksPerPiece;
static auto constexpr PieceCount = uint64_t{ 5U };
static auto constexpr TotalSize = PieceSize * (PieceCount - 1U) + 1U;
auto const info = tr_block_info{ TotalSize, PieceSize };
auto loc = info.byte_loc(0);
EXPECT_EQ(tr_block_info::Location{}, loc);
loc = info.byte_loc(1);
EXPECT_EQ(1U, loc.byte);
EXPECT_EQ(0U, loc.block);
EXPECT_EQ(1U, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(1U, loc.piece_offset);
auto n = ExpectedBlockSize - 1;
loc = info.byte_loc(n);
EXPECT_EQ(n, loc.byte);
EXPECT_EQ(0U, loc.block);
EXPECT_EQ(n, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(n, loc.piece_offset);
n = ExpectedBlockSize;
loc = info.byte_loc(n);
EXPECT_EQ(n, loc.byte);
EXPECT_EQ(1U, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(n, loc.piece_offset);
n = ExpectedBlockSize + 1;
loc = info.byte_loc(n);
EXPECT_EQ(n, loc.byte);
EXPECT_EQ(1U, loc.block);
EXPECT_EQ(1U, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(n, loc.piece_offset);
n = PieceSize - 1;
loc = info.byte_loc(n);
EXPECT_EQ(n, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece - 1, loc.block);
EXPECT_EQ(ExpectedBlockSize - 1, loc.block_offset);
EXPECT_EQ(0U, loc.piece);
EXPECT_EQ(n, loc.piece_offset);
n = PieceSize;
loc = info.byte_loc(n);
EXPECT_EQ(n, loc.byte);
EXPECT_EQ(ExpectedBlocksPerPiece, loc.block);
EXPECT_EQ(0U, loc.block_offset);
EXPECT_EQ(1U, loc.piece);
EXPECT_EQ(0U, loc.piece_offset);
}
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