github.com/anacrolix/torrent@v1.61.0/storage/file_test.go (about)

     1  package storage
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"io"
     7  	"os"
     8  	"path/filepath"
     9  	"testing"
    10  
    11  	"github.com/anacrolix/missinggo/v2"
    12  	"github.com/go-quicktest/qt"
    13  
    14  	"github.com/anacrolix/torrent/metainfo"
    15  )
    16  
    17  func TestShortFile(t *testing.T) {
    18  	td := t.TempDir()
    19  	s := NewFile(td)
    20  	defer s.Close()
    21  	info := &metainfo.Info{
    22  		Name:        "a",
    23  		Length:      2,
    24  		PieceLength: missinggo.MiB,
    25  		Pieces:      make([]byte, 20),
    26  	}
    27  	ts, err := s.OpenTorrent(context.Background(), info, metainfo.Hash{})
    28  	qt.Assert(t, qt.IsNil(err))
    29  	f, err := os.Create(filepath.Join(td, "a"))
    30  	qt.Assert(t, qt.IsNil(err))
    31  	err = f.Truncate(1)
    32  	qt.Assert(t, qt.IsNil(err))
    33  	f.Close()
    34  	var buf bytes.Buffer
    35  	p := info.Piece(0)
    36  	n, err := io.Copy(&buf, io.NewSectionReader(ts.Piece(p), 0, p.Length()))
    37  	qt.Check(t, qt.Equals(n, int64(1)))
    38  	switch err {
    39  	case nil, io.EOF:
    40  	default:
    41  		t.Fatalf("unexpected error: %v", err)
    42  	}
    43  }