fs/torrentfs_test.go

   1 package torrentfs
   2
   3 import (
   4         "context"
   5         "fmt"
   6         "io/ioutil"
   7         "log"
   8         "net"
   9         _ "net/http/pprof"
  10         "os"
  11         "path/filepath"
  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         tt, 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                 switch err.Error() {
 106                 case "cannot locate OSXFUSE",
 107                         "fusermount: exit status 1":
 108                         t.Skip(err)
 109                 }
 110                 t.Fatal(err)
 111         }
 112         go func() {
 113                 server := fusefs.New(fuseConn, &fusefs.Config{
 114                         Debug: func(msg interface{}) {
 115                                 t.Log(msg)
 116                         },
 117                 })
 118                 server.Serve(fs)
 119         }()
 120         <-fuseConn.Ready
 121         if err := fuseConn.MountError; err != nil {
 122                 t.Fatalf("mount error: %s", err)
 123         }
 124         ctx, cancel := context.WithCancel(context.Background())
 125         // Read the greeting file, though it will never be available. This should
 126         // "wedge" FUSE, requiring the fs object to be forcibly destroyed. The
 127         // read call will return with a FS error.
 128         go func() {
 129                 <-ctx.Done()
 130                 fs.mu.Lock()
 131                 fs.event.Broadcast()
 132                 fs.mu.Unlock()
 133         }()
 134         go func() {
 135                 defer cancel()
 136                 _, err := ioutil.ReadFile(filepath.Join(layout.MountDir, tt.Info().Name))
 137                 if err == nil {
 138                         t.Fatal("expected error reading greeting")
 139                 }
 140         }()
 141
 142         // Wait until the read has blocked inside the filesystem code.
 143         fs.mu.Lock()
 144         for fs.blockedReads != 1 && ctx.Err() == nil {
 145                 fs.event.Wait()
 146         }
 147         fs.mu.Unlock()
 148
 149         fs.Destroy()
 150
 151         for {
 152                 err = fuse.Unmount(layout.MountDir)
 153                 if err != nil {
 154                         t.Logf("error unmounting: %s", err)
 155                         time.Sleep(time.Millisecond)
 156                 } else {
 157                         break
 158                 }
 159         }
 160
 161         err = fuseConn.Close()
 162         if err != nil {
 163                 t.Fatalf("error closing fuse conn: %s", err)
 164         }
 165 }
 166
 167 func TestDownloadOnDemand(t *testing.T) {
 168         layout, err := newGreetingLayout()
 169         require.NoError(t, err)
 170         defer layout.Destroy()
 171         seeder, err := torrent.NewClient(&torrent.Config{
 172                 DataDir:         layout.Completed,
 173                 DisableTrackers: true,
 174                 NoDHT:           true,
 175                 ListenAddr:      "localhost:0",
 176                 Seed:            true,
 177         })
 178         require.NoError(t, err)
 179         defer seeder.Close()
 180         testutil.ExportStatusWriter(seeder, "s")
 181         // Just to mix things up, the seeder starts with the data, but the leecher
 182         // starts with the metainfo.
 183         seederTorrent, err := seeder.AddMagnet(fmt.Sprintf("magnet:?xt=urn:btih:%s", layout.Metainfo.HashInfoBytes().HexString()))
 184         require.NoError(t, err)
 185         go func() {
 186                 // Wait until we get the metainfo, then check for the data.
 187                 <-seederTorrent.GotInfo()
 188                 seederTorrent.VerifyData()
 189         }()
 190         leecher, err := torrent.NewClient(&torrent.Config{
 191                 DisableTrackers: true,
 192                 NoDHT:           true,
 193                 ListenAddr:      "localhost:0",
 194                 DisableTCP:      true,
 195                 DefaultStorage:  storage.NewMMap(filepath.Join(layout.BaseDir, "download")),
 196                 // This can be used to check if clients can connect to other clients
 197                 // with the same ID.
 198                 // PeerID: seeder.PeerID(),
 199         })
 200         require.NoError(t, err)
 201         testutil.ExportStatusWriter(leecher, "l")
 202         defer leecher.Close()
 203         leecherTorrent, _ := leecher.AddTorrent(layout.Metainfo)
 204         leecherTorrent.AddPeers([]torrent.Peer{
 205                 {
 206                         IP:   missinggo.AddrIP(seeder.ListenAddr()),
 207                         Port: missinggo.AddrPort(seeder.ListenAddr()),
 208                 },
 209         })
 210         fs := New(leecher)
 211         defer fs.Destroy()
 212         root, _ := fs.Root()
 213         node, _ := root.(fusefs.NodeStringLookuper).Lookup(netContext.Background(), "greeting")
 214         var attr fuse.Attr
 215         node.Attr(netContext.Background(), &attr)
 216         size := attr.Size
 217         resp := &fuse.ReadResponse{
 218                 Data: make([]byte, size),
 219         }
 220         h, err := node.(fusefs.NodeOpener).Open(nil, nil, nil)
 221         require.NoError(t, err)
 222         h.(fusefs.HandleReader).Read(netContext.Background(), &fuse.ReadRequest{
 223                 Size: int(size),
 224         }, resp)
 225         assert.EqualValues(t, testutil.GreetingFileContents, resp.Data)
 226 }
 227
 228 func TestIsSubPath(t *testing.T) {
 229         for _, case_ := range []struct {
 230                 parent, child string
 231                 is            bool
 232         }{
 233                 {"", "", false},
 234                 {"", "/", true},
 235                 {"", "a", true},
 236                 {"a/b", "a/bc", false},
 237                 {"a/b", "a/b", false},
 238                 {"a/b", "a/b/c", true},
 239                 {"a/b", "a//b", false},
 240         } {
 241                 assert.Equal(t, case_.is, isSubPath(case_.parent, case_.child))
 242         }
 243 }