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torrent_test.go
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torrent_test.go
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package torrent
import (
"testing"
"github.com/michaeldye/torrent/peer_protocol"
)
func r(i, b, l peer_protocol.Integer) request {
return request{i, chunkSpec{b, l}}
}
// Check the given Request is correct for various torrent offsets.
func TestTorrentRequest(t *testing.T) {
const s = 472183431 // Length of torrent.
for _, _case := range []struct {
off int64 // An offset into the torrent.
req request // The expected Request. The zero value means !ok.
}{
// Invalid offset.
{-1, request{}},
{0, r(0, 0, 16384)},
// One before the end of a piece.
{1<<18 - 1, r(0, 1<<18-16384, 16384)},
// Offset beyond torrent length.
{472 * 1 << 20, request{}},
// One before the end of the torrent. Complicates the chunk length.
{s - 1, r((s-1)/(1<<18), (s-1)%(1<<18)/(16384)*(16384), 12935)},
{1, r(0, 0, 16384)},
// One before end of chunk.
{16383, r(0, 0, 16384)},
// Second chunk.
{16384, r(0, 16384, 16384)},
} {
req, ok := torrentOffsetRequest(472183431, 1<<18, 16384, _case.off)
if (_case.req == request{}) == ok {
t.Fatalf("expected %v, got %v", _case.req, req)
}
if req != _case.req {
t.Fatalf("expected %v, got %v", _case.req, req)
}
}
}
func TestAppendToCopySlice(t *testing.T) {
orig := []int{1, 2, 3}
dupe := append([]int{}, orig...)
dupe[0] = 4
if orig[0] != 1 {
t.FailNow()
}
}
func TestTorrentString(t *testing.T) {
tor := &torrent{}
s := tor.InfoHash.HexString()
if s != "0000000000000000000000000000000000000000" {
t.FailNow()
}
}