249 lines
7.7 KiB
C++
249 lines
7.7 KiB
C++
#include "libtorrent/piece_picker.hpp"
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#include "libtorrent/policy.hpp"
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#include "test.hpp"
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using namespace libtorrent;
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int test_main()
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{
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using namespace libtorrent;
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{
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policy::peer peer_struct(tcp::endpoint(), policy::peer::connectable, 0);
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const int num_pieces = 6;
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// 4 blocks per piece
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const int blocks_per_piece = 4;
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piece_picker p(blocks_per_piece
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, num_pieces * blocks_per_piece);
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// we have the first piece
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std::vector<bool> have(num_pieces, false);
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have[0] = true;
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std::vector<piece_picker::downloading_piece> unfinished;
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piece_picker::downloading_piece partial;
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piece_picker::block_info blocks[blocks_per_piece * num_pieces];
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partial.index = 1;
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partial.info = blocks;
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partial.info[0].state = piece_picker::block_info::state_finished;
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partial.info[2].state = piece_picker::block_info::state_finished;
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unfinished.push_back(partial);
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std::vector<int> verify_pieces;
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p.files_checked(have, unfinished, verify_pieces);
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TEST_CHECK(p.is_finished(piece_block(1, 0)));
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TEST_CHECK(p.is_finished(piece_block(1, 2)));
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p.set_piece_priority(4, 0);
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TEST_CHECK(p.piece_priority(4) == 0);
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TEST_CHECK(p.piece_priority(3) == 1);
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p.set_piece_priority(3, 0);
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TEST_CHECK(p.piece_priority(3) == 0);
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p.set_piece_priority(3, 1);
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TEST_CHECK(p.piece_priority(3) == 1);
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TEST_CHECK(p.num_filtered() == 1);
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TEST_CHECK(p.num_have_filtered() == 0);
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std::vector<int> piece_priorities;
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p.piece_priorities(piece_priorities);
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int expected1[] = {1, 1, 1, 1, 0, 1};
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TEST_CHECK(std::equal(piece_priorities.begin()
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, piece_priorities.end(), expected1));
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std::vector<bool> peer1(num_pieces, false);
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std::vector<bool> peer2(num_pieces, false);
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std::vector<bool> peer3(num_pieces, false);
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peer1[2] = true;
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p.inc_refcount(2);
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peer1[3] = true;
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peer2[3] = true;
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p.inc_refcount(3);
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p.inc_refcount(3);
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peer1[4] = true;
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peer2[4] = true;
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peer3[4] = true;
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p.inc_refcount(4);
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p.inc_refcount(4);
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p.inc_refcount(4);
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peer1[5] = true;
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peer2[5] = true;
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peer3[5] = true;
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p.inc_refcount(5);
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p.inc_refcount(5);
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p.inc_refcount(5);
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// status for each piece:
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// 0: we have it
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// 1: we have block 0 and 2
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// 2: one peer has it
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// 3: two peers have it
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// 4: this piece is filtered so it should never be picked
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// 5: three peers have it
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// Now, we pick one block from peer1. The block is
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// is supposed to be picked from piece 2 since it is
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// the rarest piece.
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std::vector<piece_block> picked;
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picked.clear();
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p.pick_pieces(peer1, picked, 1, false, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 1);
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TEST_CHECK(picked.front().piece_index == 2);
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// now pick a piece from peer2. The block is supposed to be
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// from piece 3, since it is the rarest piece that peer has.
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picked.clear();
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p.pick_pieces(peer2, picked, 1, false, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 1);
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TEST_CHECK(picked.front().piece_index == 3);
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// same thing for peer3.
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picked.clear();
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p.pick_pieces(peer3, picked, 1, false, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 1);
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TEST_CHECK(picked.front().piece_index == 5);
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// now, if all peers would have piece 1 (the piece we have partially)
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// it should be prioritized over picking a completely new piece.
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peer3[1] = true;
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p.inc_refcount(1);
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picked.clear();
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p.pick_pieces(peer3, picked, 1, false, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 1);
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TEST_CHECK(picked.front().piece_index == 1);
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// and the block picked should not be 0 or 2
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// since we already have those blocks
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TEST_CHECK(picked.front().block_index != 0);
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TEST_CHECK(picked.front().block_index != 2);
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// now, if we mark piece 1 and block 0 in piece 2
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// as being downloaded and picks a block from peer1,
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// it should pick a block from piece 2. But since
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// block 0 is marked as requested from another peer,
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// the piece_picker will continue to pick blocks
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// until it can return at least 1 block (since we
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// tell it we want one block) that is not being
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// downloaded from anyone else. This is to make it
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// possible for us to determine if we want to request
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// the block from more than one peer.
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// Both piece 1 and 2 are partial pieces, but pice
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// 2 is the rarest, so that's why it is picked.
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// we have block 0 and 2 already, so we can't mark
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// them as begin downloaded.
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p.mark_as_downloading(piece_block(1, 1), &peer_struct, piece_picker::fast);
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p.mark_as_downloading(piece_block(1, 3), &peer_struct, piece_picker::fast);
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p.mark_as_downloading(piece_block(2, 0), &peer_struct, piece_picker::fast);
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std::vector<piece_picker::downloading_piece> const& downloads = p.get_download_queue();
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TEST_CHECK(downloads.size() == 2);
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TEST_CHECK(downloads[0].index == 1);
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TEST_CHECK(downloads[0].info[0].state == piece_picker::block_info::state_finished);
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TEST_CHECK(downloads[0].info[1].state == piece_picker::block_info::state_requested);
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TEST_CHECK(downloads[0].info[2].state == piece_picker::block_info::state_finished);
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TEST_CHECK(downloads[0].info[3].state == piece_picker::block_info::state_requested);
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TEST_CHECK(downloads[1].index == 2);
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TEST_CHECK(downloads[1].info[0].state == piece_picker::block_info::state_requested);
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TEST_CHECK(downloads[1].info[1].state == piece_picker::block_info::state_none);
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TEST_CHECK(downloads[1].info[2].state == piece_picker::block_info::state_none);
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TEST_CHECK(downloads[1].info[3].state == piece_picker::block_info::state_none);
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TEST_CHECK(p.is_requested(piece_block(1, 1)));
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TEST_CHECK(p.is_requested(piece_block(1, 3)));
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TEST_CHECK(p.is_requested(piece_block(2, 0)));
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TEST_CHECK(!p.is_requested(piece_block(2, 1)));
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picked.clear();
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p.pick_pieces(peer1, picked, 1, false, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 2);
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piece_block expected3[] = { piece_block(2, 0), piece_block(2, 1) };
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TEST_CHECK(std::equal(picked.begin()
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, picked.end(), expected3));
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// now, if we assume we're downloading at such a speed that
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// we might prefer to download whole pieces at a time from
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// this peer. It should not pick piece 1 or 2 (since those are
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// partially selected)
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picked.clear();
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p.pick_pieces(peer1, picked, 1, true, 0, piece_picker::fast);
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// it will pick 4 blocks, since we said we
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// wanted whole pieces.
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TEST_CHECK(picked.size() == 4);
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piece_block expected4[] =
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{
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piece_block(2, 0), piece_block(2, 1)
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, piece_block(2, 2), piece_block(2, 3)
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};
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TEST_CHECK(std::equal(picked.begin()
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, picked.end(), expected4));
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// now, try the same thing, but pick as many pieces as possible
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// to make sure it can still fall back on partial pieces
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picked.clear();
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p.pick_pieces(peer1, picked, 100, true, 0, piece_picker::fast);
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TEST_CHECK(picked.size() == 12);
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piece_block expected5[] =
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{
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piece_block(2, 0), piece_block(2, 1)
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, piece_block(2, 2), piece_block(2, 3)
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, piece_block(3, 0), piece_block(3, 1)
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, piece_block(3, 2), piece_block(3, 3)
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, piece_block(5, 0), piece_block(5, 1)
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, piece_block(5, 2), piece_block(5, 3)
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};
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TEST_CHECK(std::equal(picked.begin()
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, picked.end(), expected5));
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// now, try the same thing, but pick as many pieces as possible
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// to make sure it can still fall back on partial pieces
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picked.clear();
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p.pick_pieces(peer1, picked, 100, true, &peer_struct, piece_picker::fast);
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TEST_CHECK(picked.size() == 11);
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piece_block expected6[] =
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{
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piece_block(2, 1), piece_block(2, 2)
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, piece_block(2, 3)
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, piece_block(3, 0), piece_block(3, 1)
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, piece_block(3, 2), piece_block(3, 3)
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, piece_block(5, 0), piece_block(5, 1)
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, piece_block(5, 2), piece_block(5, 3)
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};
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TEST_CHECK(std::equal(picked.begin()
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, picked.end(), expected6));
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// make sure the piece picker allows filtered pieces
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// to become available
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p.mark_as_finished(piece_block(4, 2), 0);
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}
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return 0;
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}
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