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transmission/tests/libtransmission/block-info-test.cc
2022-04-13 20:22:59 -05:00

253 lines
8.2 KiB
C++

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