mirror of
https://github.com/transmission/transmission
synced 2024-12-23 08:13:27 +00:00
13ad2b58dc
Fixes #99.
374 lines
14 KiB
C++
374 lines
14 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 <array>
|
|
#include <numeric>
|
|
#include <cstdint>
|
|
|
|
#include "transmission.h"
|
|
|
|
#include "block-info.h"
|
|
#include "file-piece-map.h"
|
|
|
|
#include "gtest/gtest.h"
|
|
|
|
class FilePieceMapTest : public ::testing::Test
|
|
{
|
|
protected:
|
|
static constexpr size_t PieceSize{ tr_block_info::BlockSize };
|
|
static constexpr size_t TotalSize{ 10 * PieceSize + 1 };
|
|
tr_block_info const block_info_{ TotalSize, PieceSize };
|
|
|
|
static constexpr std::array<uint64_t, 17> FileSizes{
|
|
5 * PieceSize, // [offset 0] begins and ends on a piece boundary
|
|
0, // [offset 5 P] zero-sized files
|
|
0,
|
|
0,
|
|
0,
|
|
PieceSize / 2, // [offset 5 P] begins on a piece boundary
|
|
PieceSize, // [offset 5.5 P] neither begins nor ends on a piece boundary, spans >1 piece
|
|
10, // [offset 6.5 P] small files all contained in a single piece
|
|
9,
|
|
8,
|
|
7,
|
|
6,
|
|
(3 * PieceSize + PieceSize / 2 + 1 - 10 - 9 - 8 - 7 - 6), // [offset 5.75P +10+9+8+7+6] ends end-of-torrent
|
|
0, // [offset 10P+1] zero-sized files at the end-of-torrent
|
|
0,
|
|
0,
|
|
0,
|
|
// sum is 10P + 1 == TotalSize
|
|
};
|
|
|
|
void SetUp() override
|
|
{
|
|
static_assert(
|
|
FileSizes[0] + FileSizes[1] + FileSizes[2] + FileSizes[3] + FileSizes[4] + FileSizes[5] + FileSizes[6] +
|
|
FileSizes[7] + FileSizes[8] + FileSizes[9] + FileSizes[10] + FileSizes[11] + FileSizes[12] + FileSizes[13] +
|
|
FileSizes[14] + FileSizes[15] + FileSizes[16] ==
|
|
TotalSize);
|
|
|
|
EXPECT_EQ(11, block_info_.n_pieces);
|
|
EXPECT_EQ(PieceSize, block_info_.piece_size);
|
|
EXPECT_EQ(TotalSize, block_info_.total_size);
|
|
EXPECT_EQ(TotalSize, std::accumulate(std::begin(FileSizes), std::end(FileSizes), uint64_t{ 0 }));
|
|
}
|
|
};
|
|
|
|
TEST_F(FilePieceMapTest, fileOffset)
|
|
{
|
|
auto const fpm = tr_file_piece_map{ block_info_, std::data(FileSizes), std::size(FileSizes) };
|
|
|
|
// first byte of the first file
|
|
auto file_offset = fpm.fileOffset(0);
|
|
EXPECT_EQ(0, file_offset.index);
|
|
EXPECT_EQ(0, file_offset.offset);
|
|
|
|
// final byte of the first file
|
|
file_offset = fpm.fileOffset(FileSizes[0] - 1);
|
|
EXPECT_EQ(0, file_offset.index);
|
|
EXPECT_EQ(FileSizes[0] - 1, file_offset.offset);
|
|
|
|
// first byte of the second file
|
|
// NB: this is an edge case, second file is 0 bytes.
|
|
// The second nonzero file is file #5
|
|
file_offset = fpm.fileOffset(FileSizes[0]);
|
|
EXPECT_EQ(5, file_offset.index);
|
|
EXPECT_EQ(0, file_offset.offset);
|
|
|
|
// the last byte of in the torrent.
|
|
// NB: reverse of previous edge case, since
|
|
// the final 4 files in the torrent are all 0 bytes
|
|
file_offset = fpm.fileOffset(TotalSize - 1);
|
|
EXPECT_EQ(12, file_offset.index);
|
|
EXPECT_EQ(FileSizes[12] - 1, file_offset.offset);
|
|
}
|
|
|
|
TEST_F(FilePieceMapTest, pieceSpan)
|
|
{
|
|
// Note to reviewers: it's easy to see a nonexistent fencepost error here.
|
|
// Remember everything is zero-indexed, so the 11 valid pieces are [0..10]
|
|
// and that last piece #10 has one byte in it. Piece #11 is the 'end' iterator position.
|
|
auto constexpr ExpectedPieceSpans = std::array<tr_file_piece_map::piece_span_t, 17>{ {
|
|
{ 0, 5 },
|
|
{ 5, 6 },
|
|
{ 5, 6 },
|
|
{ 5, 6 },
|
|
{ 5, 6 },
|
|
{ 5, 6 },
|
|
{ 5, 7 },
|
|
{ 6, 7 },
|
|
{ 6, 7 },
|
|
{ 6, 7 },
|
|
{ 6, 7 },
|
|
{ 6, 7 },
|
|
{ 6, 11 },
|
|
{ 10, 11 },
|
|
{ 10, 11 },
|
|
{ 10, 11 },
|
|
{ 10, 11 },
|
|
} };
|
|
EXPECT_EQ(std::size(FileSizes), std::size(ExpectedPieceSpans));
|
|
|
|
auto const fpm = tr_file_piece_map{ block_info_, std::data(FileSizes), std::size(FileSizes) };
|
|
tr_file_index_t const n = std::size(fpm);
|
|
EXPECT_EQ(std::size(FileSizes), n);
|
|
uint64_t offset = 0;
|
|
for (tr_file_index_t file = 0; file < n; ++file)
|
|
{
|
|
EXPECT_EQ(ExpectedPieceSpans[file].begin, fpm.pieceSpan(file).begin);
|
|
EXPECT_EQ(ExpectedPieceSpans[file].end, fpm.pieceSpan(file).end);
|
|
offset += FileSizes[file];
|
|
}
|
|
EXPECT_EQ(TotalSize, offset);
|
|
EXPECT_EQ(block_info_.n_pieces, fpm.pieceSpan(std::size(FileSizes) - 1).end);
|
|
}
|
|
|
|
TEST_F(FilePieceMapTest, priorities)
|
|
{
|
|
auto const fpm = tr_file_piece_map{ block_info_, std::data(FileSizes), std::size(FileSizes) };
|
|
auto file_priorities = tr_file_priorities(&fpm);
|
|
tr_file_index_t const n_files = std::size(FileSizes);
|
|
|
|
// make a helper to compare file & piece priorities
|
|
auto expected_file_priorities = std::vector<tr_priority_t>(n_files, TR_PRI_NORMAL);
|
|
auto expected_piece_priorities = std::vector<tr_priority_t>(block_info_.n_pieces, TR_PRI_NORMAL);
|
|
auto const compare_to_expected = [&, this]()
|
|
{
|
|
for (tr_file_index_t i = 0; i < n_files; ++i)
|
|
{
|
|
EXPECT_EQ(int(expected_file_priorities[i]), int(file_priorities.filePriority(i)));
|
|
}
|
|
for (tr_piece_index_t i = 0; i < block_info_.n_pieces; ++i)
|
|
{
|
|
EXPECT_EQ(int(expected_piece_priorities[i]), int(file_priorities.piecePriority(i)));
|
|
}
|
|
};
|
|
|
|
// check default priority is normal
|
|
compare_to_expected();
|
|
|
|
// set the first file as high priority.
|
|
// since this begins and ends on a piece boundary,
|
|
// this shouldn't affect any other files' pieces
|
|
auto pri = TR_PRI_HIGH;
|
|
file_priorities.set(0, pri);
|
|
expected_file_priorities[0] = pri;
|
|
for (size_t i = 0; i < 5; ++i)
|
|
{
|
|
expected_piece_priorities[i] = pri;
|
|
}
|
|
compare_to_expected();
|
|
|
|
// This file shares a piece with another file.
|
|
// If _either_ is set to high, the piece's priority should be high.
|
|
// file #5: byte [500..550) piece [5, 6)
|
|
// file #6: byte [550..650) piece [5, 7)
|
|
//
|
|
// first test setting file #5...
|
|
pri = TR_PRI_HIGH;
|
|
file_priorities.set(5, pri);
|
|
expected_file_priorities[5] = pri;
|
|
expected_piece_priorities[5] = pri;
|
|
compare_to_expected();
|
|
// ...and that shared piece should still be the same when both are high...
|
|
file_priorities.set(6, pri);
|
|
expected_file_priorities[6] = pri;
|
|
expected_piece_priorities[5] = pri;
|
|
expected_piece_priorities[6] = pri;
|
|
compare_to_expected();
|
|
// ...and that shared piece should still be the same when only 6 is high...
|
|
pri = TR_PRI_NORMAL;
|
|
file_priorities.set(5, pri);
|
|
expected_file_priorities[5] = pri;
|
|
compare_to_expected();
|
|
|
|
// setup for the next test: set all files to low priority
|
|
pri = TR_PRI_LOW;
|
|
for (tr_file_index_t i = 0; i < n_files; ++i)
|
|
{
|
|
file_priorities.set(i, pri);
|
|
}
|
|
std::fill(std::begin(expected_file_priorities), std::end(expected_file_priorities), pri);
|
|
std::fill(std::begin(expected_piece_priorities), std::end(expected_piece_priorities), pri);
|
|
compare_to_expected();
|
|
|
|
// Raise the priority of a small 1-piece file.
|
|
// Since it's the highest priority in the piece, piecePriority() should return its value.
|
|
// file #8: byte [650, 659) piece [6, 7)
|
|
pri = TR_PRI_NORMAL;
|
|
file_priorities.set(8, pri);
|
|
expected_file_priorities[8] = pri;
|
|
expected_piece_priorities[6] = pri;
|
|
compare_to_expected();
|
|
// Raise the priority of another small 1-piece file in the same piece.
|
|
// Since _it_ now has the highest priority in the piece, piecePriority should return _its_ value.
|
|
// file #9: byte [659, 667) piece [6, 7)
|
|
pri = TR_PRI_HIGH;
|
|
file_priorities.set(9, pri);
|
|
expected_file_priorities[9] = pri;
|
|
expected_piece_priorities[6] = pri;
|
|
compare_to_expected();
|
|
|
|
// Prep for the next test: set all files to normal priority
|
|
pri = TR_PRI_NORMAL;
|
|
for (tr_file_index_t i = 0; i < n_files; ++i)
|
|
{
|
|
file_priorities.set(i, pri);
|
|
}
|
|
std::fill(std::begin(expected_file_priorities), std::end(expected_file_priorities), pri);
|
|
std::fill(std::begin(expected_piece_priorities), std::end(expected_piece_priorities), pri);
|
|
compare_to_expected();
|
|
|
|
// *Sigh* OK what happens to piece priorities if you set the priority
|
|
// of a zero-byte file. Arguably nothing should happen since you can't
|
|
// download an empty file. But that would complicate the code for a
|
|
// pretty stupid use case, and treating 0-sized files the same as any
|
|
// other does no real harm. Let's KISS.
|
|
//
|
|
// Check that even zero-sized files can change a piece's priority
|
|
// file #1: byte [500, 500) piece [5, 6)
|
|
pri = TR_PRI_HIGH;
|
|
file_priorities.set(1, pri);
|
|
expected_file_priorities[1] = pri;
|
|
expected_piece_priorities[5] = pri;
|
|
compare_to_expected();
|
|
// Check that zero-sized files at the end of a torrent change the last piece's priority.
|
|
// file #16 byte [1001, 1001) piece [10, 11)
|
|
file_priorities.set(16, pri);
|
|
expected_file_priorities[16] = pri;
|
|
expected_piece_priorities[10] = pri;
|
|
compare_to_expected();
|
|
|
|
// test the batch API
|
|
auto file_indices = std::vector<tr_file_index_t>(n_files);
|
|
std::iota(std::begin(file_indices), std::end(file_indices), 0);
|
|
pri = TR_PRI_HIGH;
|
|
file_priorities.set(std::data(file_indices), std::size(file_indices), pri);
|
|
std::fill(std::begin(expected_file_priorities), std::end(expected_file_priorities), pri);
|
|
std::fill(std::begin(expected_piece_priorities), std::end(expected_piece_priorities), pri);
|
|
compare_to_expected();
|
|
pri = TR_PRI_LOW;
|
|
file_priorities.set(std::data(file_indices), std::size(file_indices), pri);
|
|
std::fill(std::begin(expected_file_priorities), std::end(expected_file_priorities), pri);
|
|
std::fill(std::begin(expected_piece_priorities), std::end(expected_piece_priorities), pri);
|
|
compare_to_expected();
|
|
}
|
|
|
|
TEST_F(FilePieceMapTest, wanted)
|
|
{
|
|
auto const fpm = tr_file_piece_map{ block_info_, std::data(FileSizes), std::size(FileSizes) };
|
|
auto files_wanted = tr_files_wanted(&fpm);
|
|
tr_file_index_t const n_files = std::size(FileSizes);
|
|
|
|
// make a helper to compare file & piece priorities
|
|
auto expected_files_wanted = tr_bitfield(n_files);
|
|
auto expected_pieces_wanted = tr_bitfield(block_info_.n_pieces);
|
|
auto const compare_to_expected = [&, this]()
|
|
{
|
|
for (tr_file_index_t i = 0; i < n_files; ++i)
|
|
{
|
|
EXPECT_EQ(int(expected_files_wanted.test(i)), int(files_wanted.fileWanted(i)));
|
|
}
|
|
for (tr_piece_index_t i = 0; i < block_info_.n_pieces; ++i)
|
|
{
|
|
EXPECT_EQ(int(expected_pieces_wanted.test(i)), int(files_wanted.pieceWanted(i)));
|
|
}
|
|
};
|
|
|
|
// check everything is wanted by default
|
|
expected_files_wanted.setHasAll();
|
|
expected_pieces_wanted.setHasAll();
|
|
compare_to_expected();
|
|
|
|
// set the first file as not wanted.
|
|
// since this begins and ends on a piece boundary,
|
|
// this shouldn't affect any other files' pieces
|
|
bool wanted = false;
|
|
files_wanted.set(0, wanted);
|
|
expected_files_wanted.set(0, wanted);
|
|
expected_pieces_wanted.setSpan(0, 5, wanted);
|
|
compare_to_expected();
|
|
|
|
// now test when a piece has >1 file.
|
|
// if *any* file in that piece is wanted, then we want the piece too.
|
|
// file #1: byte [100..100) piece [5, 6) (zero-byte file)
|
|
// file #2: byte [100..100) piece [5, 6) (zero-byte file)
|
|
// file #3: byte [100..100) piece [5, 6) (zero-byte file)
|
|
// file #4: byte [100..100) piece [5, 6) (zero-byte file)
|
|
// file #5: byte [500..550) piece [5, 6)
|
|
// file #6: byte [550..650) piece [5, 7)
|
|
//
|
|
// first test setting file #5...
|
|
files_wanted.set(5, false);
|
|
expected_files_wanted.unset(5);
|
|
compare_to_expected();
|
|
// marking all the files in the piece as unwanted
|
|
// should cause the piece to become unwanted
|
|
files_wanted.set(1, false);
|
|
files_wanted.set(2, false);
|
|
files_wanted.set(3, false);
|
|
files_wanted.set(4, false);
|
|
files_wanted.set(5, false);
|
|
files_wanted.set(6, false);
|
|
expected_files_wanted.setSpan(1, 7, false);
|
|
expected_pieces_wanted.unset(5);
|
|
compare_to_expected();
|
|
// but as soon as any of them is turned back to wanted,
|
|
// the piece should pop back.
|
|
files_wanted.set(6, true);
|
|
expected_files_wanted.set(6, true);
|
|
expected_pieces_wanted.set(5);
|
|
compare_to_expected();
|
|
files_wanted.set(5, true);
|
|
files_wanted.set(6, false);
|
|
expected_files_wanted.set(5);
|
|
expected_files_wanted.unset(6);
|
|
compare_to_expected();
|
|
files_wanted.set(4, true);
|
|
files_wanted.set(5, false);
|
|
expected_files_wanted.set(4);
|
|
expected_files_wanted.unset(5);
|
|
compare_to_expected();
|
|
|
|
// Prep for the next test: set all files to unwanted priority
|
|
for (tr_file_index_t i = 0; i < n_files; ++i)
|
|
{
|
|
files_wanted.set(i, false);
|
|
}
|
|
expected_files_wanted.setHasNone();
|
|
expected_pieces_wanted.setHasNone();
|
|
compare_to_expected();
|
|
|
|
// *Sigh* OK what happens to files_wanted if you say the only
|
|
// file you want is a zero-byte file? Arguably nothing should happen
|
|
// since you can't download a zero-byte file. But that would complicate
|
|
// the coe for a stupid use case, so let's KISS.
|
|
//
|
|
// Check that even zero-sized files can change a file's 'wanted' state
|
|
// file #1: byte [500, 500) piece [5, 6)
|
|
files_wanted.set(1, true);
|
|
expected_files_wanted.set(1);
|
|
expected_pieces_wanted.set(5);
|
|
compare_to_expected();
|
|
// Check that zero-sized files at the end of a torrent change the last piece's state.
|
|
// file #16 byte [1001, 1001) piece [10, 11)
|
|
files_wanted.set(16, true);
|
|
expected_files_wanted.set(16);
|
|
expected_pieces_wanted.set(10);
|
|
compare_to_expected();
|
|
|
|
// test the batch API
|
|
auto file_indices = std::vector<tr_file_index_t>(n_files);
|
|
std::iota(std::begin(file_indices), std::end(file_indices), 0);
|
|
files_wanted.set(std::data(file_indices), std::size(file_indices), true);
|
|
expected_files_wanted.setHasAll();
|
|
expected_pieces_wanted.setHasAll();
|
|
compare_to_expected();
|
|
files_wanted.set(std::data(file_indices), std::size(file_indices), false);
|
|
expected_files_wanted.setHasNone();
|
|
expected_pieces_wanted.setHasNone();
|
|
compare_to_expected();
|
|
}
|