fs/torrentfs_test.go

   1 package torrentfs
   2
   3 import (
   4         "fmt"
   5         "io/ioutil"
   6         "log"
   7         "net"
   8         _ "net/http/pprof"
   9         "os"
  10         "path/filepath"
  11         "strings"
  12         "testing"
  13         "time"
  14
  15         "bazil.org/fuse"
  16         fusefs "bazil.org/fuse/fs"
  17         _ "github.com/anacrolix/envpprof"
  18         "github.com/anacrolix/missinggo"
  19         "github.com/stretchr/testify/assert"
  20         "github.com/stretchr/testify/require"
  21         netContext "golang.org/x/net/context"
  22
  23         "github.com/anacrolix/torrent"
  24         "github.com/anacrolix/torrent/internal/testutil"
  25         "github.com/anacrolix/torrent/metainfo"
  26         "github.com/anacrolix/torrent/storage"
  27 )
  28
  29 func init() {
  30         log.SetFlags(log.Flags() | log.Lshortfile)
  31 }
  32
  33 func TestTCPAddrString(t *testing.T) {
  34         l, err := net.Listen("tcp4", "localhost:0")
  35         if err != nil {
  36                 t.Fatal(err)
  37         }
  38         defer l.Close()
  39         c, err := net.Dial("tcp", l.Addr().String())
  40         if err != nil {
  41                 t.Fatal(err)
  42         }
  43         defer c.Close()
  44         ras := c.RemoteAddr().String()
  45         ta := &net.TCPAddr{
  46                 IP:   net.IPv4(127, 0, 0, 1),
  47                 Port: missinggo.AddrPort(l.Addr()),
  48         }
  49         s := ta.String()
  50         if ras != s {
  51                 t.FailNow()
  52         }
  53 }
  54
  55 type testLayout struct {
  56         BaseDir   string
  57         MountDir  string
  58         Completed string
  59         Metainfo  *metainfo.MetaInfo
  60 }
  61
  62 func (tl *testLayout) Destroy() error {
  63         return os.RemoveAll(tl.BaseDir)
  64 }
  65
  66 func newGreetingLayout() (tl testLayout, err error) {
  67         tl.BaseDir, err = ioutil.TempDir("", "torrentfs")
  68         if err != nil {
  69                 return
  70         }
  71         tl.Completed = filepath.Join(tl.BaseDir, "completed")
  72         os.Mkdir(tl.Completed, 0777)
  73         tl.MountDir = filepath.Join(tl.BaseDir, "mnt")
  74         os.Mkdir(tl.MountDir, 0777)
  75         testutil.CreateDummyTorrentData(tl.Completed)
  76         tl.Metainfo = testutil.GreetingMetaInfo()
  77         return
  78 }
  79
  80 // Unmount without first killing the FUSE connection while there are FUSE
  81 // operations blocked inside the filesystem code.
  82 func TestUnmountWedged(t *testing.T) {
  83         layout, err := newGreetingLayout()
  84         require.NoError(t, err)
  85         defer func() {
  86                 err := layout.Destroy()
  87                 if err != nil {
  88                         t.Log(err)
  89                 }
  90         }()
  91         client, err := torrent.NewClient(&torrent.Config{
  92                 DataDir:         filepath.Join(layout.BaseDir, "incomplete"),
  93                 DisableTrackers: true,
  94                 NoDHT:           true,
  95                 DisableTCP:      true,
  96                 DisableUTP:      true,
  97         })
  98         require.NoError(t, err)
  99         defer client.Close()
 100         _, err = client.AddTorrent(layout.Metainfo)
 101         require.NoError(t, err)
 102         fs := New(client)
 103         fuseConn, err := fuse.Mount(layout.MountDir)
 104         if err != nil {
 105                 msg := fmt.Sprintf("error mounting: %s", err)
 106                 if strings.Contains(err.Error(), "fuse") || err.Error() == "exit status 71" {
 107                         t.Skip(msg)
 108                 }
 109                 t.Fatal(msg)
 110         }
 111         go func() {
 112                 server := fusefs.New(fuseConn, &fusefs.Config{
 113                         Debug: func(msg interface{}) {
 114                                 t.Log(msg)
 115                         },
 116                 })
 117                 server.Serve(fs)
 118         }()
 119         <-fuseConn.Ready
 120         if err := fuseConn.MountError; err != nil {
 121                 t.Fatalf("mount error: %s", err)
 122         }
 123         // Read the greeting file, though it will never be available. This should
 124         // "wedge" FUSE, requiring the fs object to be forcibly destroyed. The
 125         // read call will return with a FS error.
 126         go func() {
 127                 _, err := ioutil.ReadFile(filepath.Join(layout.MountDir, layout.Metainfo.Info.Name))
 128                 if err == nil {
 129                         t.Fatal("expected error reading greeting")
 130                 }
 131         }()
 132
 133         // Wait until the read has blocked inside the filesystem code.
 134         fs.mu.Lock()
 135         for fs.blockedReads != 1 {
 136                 fs.event.Wait()
 137         }
 138         fs.mu.Unlock()
 139
 140         fs.Destroy()
 141
 142         for {
 143                 err = fuse.Unmount(layout.MountDir)
 144                 if err != nil {
 145                         t.Logf("error unmounting: %s", err)
 146                         time.Sleep(time.Millisecond)
 147                 } else {
 148                         break
 149                 }
 150         }
 151
 152         err = fuseConn.Close()
 153         if err != nil {
 154                 t.Fatalf("error closing fuse conn: %s", err)
 155         }
 156 }
 157
 158 func TestDownloadOnDemand(t *testing.T) {
 159         layout, err := newGreetingLayout()
 160         require.NoError(t, err)
 161         defer layout.Destroy()
 162         seeder, err := torrent.NewClient(&torrent.Config{
 163                 DataDir:         layout.Completed,
 164                 DisableTrackers: true,
 165                 NoDHT:           true,
 166                 ListenAddr:      "localhost:0",
 167                 Seed:            true,
 168         })
 169         require.NoError(t, err)
 170         defer seeder.Close()
 171         testutil.ExportStatusWriter(seeder, "s")
 172         _, err = seeder.AddMagnet(fmt.Sprintf("magnet:?xt=urn:btih:%s", layout.Metainfo.Info.Hash().HexString()))
 173         require.NoError(t, err)
 174         leecher, err := torrent.NewClient(&torrent.Config{
 175                 DisableTrackers: true,
 176                 NoDHT:           true,
 177                 ListenAddr:      "localhost:0",
 178                 DisableTCP:      true,
 179                 DefaultStorage:  storage.NewMMap(filepath.Join(layout.BaseDir, "download")),
 180                 // This can be used to check if clients can connect to other clients
 181                 // with the same ID.
 182                 // PeerID: seeder.PeerID(),
 183         })
 184         require.NoError(t, err)
 185         testutil.ExportStatusWriter(leecher, "l")
 186         defer leecher.Close()
 187         leecherTorrent, _ := leecher.AddTorrent(layout.Metainfo)
 188         leecherTorrent.AddPeers([]torrent.Peer{
 189                 torrent.Peer{
 190                         IP:   missinggo.AddrIP(seeder.ListenAddr()),
 191                         Port: missinggo.AddrPort(seeder.ListenAddr()),
 192                 },
 193         })
 194         fs := New(leecher)
 195         defer fs.Destroy()
 196         root, _ := fs.Root()
 197         node, _ := root.(fusefs.NodeStringLookuper).Lookup(netContext.Background(), "greeting")
 198         var attr fuse.Attr
 199         node.Attr(netContext.Background(), &attr)
 200         size := attr.Size
 201         resp := &fuse.ReadResponse{
 202                 Data: make([]byte, size),
 203         }
 204         node.(fusefs.HandleReader).Read(netContext.Background(), &fuse.ReadRequest{
 205                 Size: int(size),
 206         }, resp)
 207         assert.EqualValues(t, testutil.GreetingFileContents, resp.Data)
 208 }
 209
 210 func TestIsSubPath(t *testing.T) {
 211         for _, case_ := range []struct {
 212                 parent, child string
 213                 is            bool
 214         }{
 215                 {"", "", false},
 216                 {"", "/", true},
 217                 {"", "a", true},
 218                 {"a/b", "a/bc", false},
 219                 {"a/b", "a/b", false},
 220                 {"a/b", "a/b/c", true},
 221                 {"a/b", "a//b", false},
 222         } {
 223                 assert.Equal(t, case_.is, isSubPath(case_.parent, case_.child))
 224         }
 225 }