Golang bazil-org-fuse-fs-fstestutil.MountedT类(方法)实例源码

func testTruncate(t *testing.T, toSize int64) {
	t.Parallel()
	f := &truncate{}
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	err = os.Truncate(mnt.Dir+"/child", toSize)
	if err != nil {
		t.Fatalf("Truncate: %v", err)
	}
	gotr := f.RecordedSetattr()
	if gotr == (fuse.SetattrRequest{}) {
		t.Fatalf("no recorded SetattrRequest")
	}
	if g, e := gotr.Size, uint64(toSize); g != e {
		t.Errorf("got Size = %q; want %q", g, e)
	}
	if g, e := gotr.Valid&^fuse.SetattrLockOwner, fuse.SetattrSize; g != e {
		t.Errorf("got Valid = %q; want %q", g, e)
	}
	t.Logf("Got request: %#v", gotr)
}

func TestMountOptionDefaultPermissions(t *testing.T) {
	if runtime.GOOS == "freebsd" {
		t.Skip("FreeBSD does not support DefaultPermissions")
	}
	t.Parallel()
	mnt, err := fstestutil.MountedT(t,
		fstestutil.SimpleFS{
			fstestutil.ChildMap{"child": unwritableFile{}},
		},
		fuse.DefaultPermissions(),
	)

	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	// This will be prevented by kernel-level access checking when
	// DefaultPermissions is used.
	f, err := os.OpenFile(mnt.Dir+"/child", os.O_WRONLY, 0000)
	if err == nil {
		f.Close()
		t.Fatal("expected an error")
	}
	if !os.IsPermission(err) {
		t.Fatalf("expected a permission error, got %T: %v", err, err)
	}
}

func TestSetxattr(t *testing.T) {
	t.Parallel()
	f := &setxattr{}
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	err = syscallx.Setxattr(mnt.Dir+"/child", "greeting", []byte("hello, world"), 0)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
		return
	}

	// fuse.SetxattrRequest contains a byte slice and thus cannot be
	// directly compared
	got := f.RecordedSetxattr()

	if g, e := got.Name, "greeting"; g != e {
		t.Errorf("Setxattr incorrect name: %q != %q", g, e)
	}

	if g, e := got.Flags, uint32(0); g != e {
		t.Errorf("Setxattr incorrect flags: %d != %d", g, e)
	}

	if g, e := string(got.Xattr), "hello, world"; g != e {
		t.Errorf("Setxattr incorrect data: %q != %q", g, e)
	}
}

func TestSymlink(t *testing.T) {
	t.Parallel()
	f := &symlink1{}
	mnt, err := fstestutil.MountedT(t, simpleFS{f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	const target = "/some-target"

	err = os.Symlink(target, mnt.Dir+"/symlink.file")
	if err != nil {
		t.Fatalf("os.Symlink: %v", err)
	}

	want := fuse.SymlinkRequest{NewName: "symlink.file", Target: target}
	if g, e := f.RecordedSymlink(), want; g != e {
		t.Errorf("symlink saw %+v, want %+v", g, e)
	}

	gotName, err := os.Readlink(mnt.Dir + "/symlink.file")
	if err != nil {
		t.Fatalf("os.Readlink: %v", err)
	}
	if gotName != target {
		t.Errorf("os.Readlink = %q; want %q", gotName, target)
	}
}

func TestListxattr(t *testing.T) {
	t.Parallel()
	f := &listxattr{}
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	buf := make([]byte, 8192)
	n, err := syscallx.Listxattr(mnt.Dir+"/child", buf)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
		return
	}
	buf = buf[:n]
	if g, e := string(buf), "one\x00two\x00"; g != e {
		t.Errorf("wrong listxattr content: %#v != %#v", g, e)
	}

	want := fuse.ListxattrRequest{
		Size: 8192,
	}
	if g, e := f.RecordedListxattr(), want; g != e {
		t.Fatalf("listxattr saw %+v, want %+v", g, e)
	}
}

func TestTruncateWithOpen(t *testing.T) {
	t.Parallel()
	f := &truncateWithOpen{}
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	fil, err := os.OpenFile(mnt.Dir+"/child", os.O_WRONLY|os.O_TRUNC, 0666)
	if err != nil {
		t.Error(err)
		return
	}
	fil.Close()

	gotr := f.RecordedSetattr()
	if gotr == (fuse.SetattrRequest{}) {
		t.Fatalf("no recorded SetattrRequest")
	}
	if g, e := gotr.Size, uint64(0); g != e {
		t.Errorf("got Size = %q; want %q", g, e)
	}
	// osxfuse sets SetattrHandle here, linux does not
	if g, e := gotr.Valid&^(fuse.SetattrLockOwner|fuse.SetattrHandle), fuse.SetattrSize; g != e {
		t.Errorf("got Valid = %q; want %q", g, e)
	}
	t.Logf("Got request: %#v", gotr)
}

func TestReadDir(t *testing.T) {
	t.Parallel()
	f := &readdir{}
	mnt, err := fstestutil.MountedT(t, simpleFS{f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	fil, err := os.Open(mnt.Dir)
	if err != nil {
		t.Error(err)
		return
	}
	defer fil.Close()

	// go Readdir is just Readdirnames + Lstat, there's no point in
	// testing that here; we have no consumption API for the real
	// dirent data
	names, err := fil.Readdirnames(100)
	if err != nil {
		t.Error(err)
		return
	}

	t.Logf("Got readdir: %q", names)

	if len(names) != 3 ||
		names[0] != "one" ||
		names[1] != "three" ||
		names[2] != "two" {
		t.Errorf(`expected 3 entries of "one", "three", "two", got: %q`, names)
		return
	}
}

func TestMountOptionSubtype(t *testing.T) {
	if runtime.GOOS == "darwin" {
		t.Skip("OS X does not support Subtype")
	}
	if runtime.GOOS == "freebsd" {
		t.Skip("FreeBSD does not support Subtype")
	}
	t.Parallel()
	const name = "FuseTestMarker"
	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{fstestutil.Dir{}},
		fuse.Subtype(name),
	)
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	info, err := fstestutil.GetMountInfo(mnt.Dir)
	if err != nil {
		t.Fatal(err)
	}
	if g, e := info.Type, "fuse."+name; g != e {
		t.Errorf("wrong Subtype: %q != %q", g, e)
	}
}

func TestJunkType(t *testing.T) {
	tmp := tempdir.New(t)
	defer tmp.Cleanup()

	setup_fs := func() fs.FS {
		chunkStore := &mock.InMemory{}
		dir := setup_dir(t, chunkStore, []*wire.Dirent{
			&wire.Dirent{
				Name: "junk",
			},
		})
		filesys, err := newFS(chunkStore, dir.Type.Dir)
		if err != nil {
			t.Fatalf("cannot serve snapshot as FUSE: %v", err)
		}
		return filesys
	}
	filesys := setup_fs()

	mnt, err := fstestutil.MountedT(t, filesys)
	if err != nil {
		t.Fatalf("Mount fail: %v\n", err)
	}
	defer mnt.Close()

	junk_path := path.Join(mnt.Dir, "junk")
	_, err = os.Stat(junk_path)
	if err == nil {
		t.Fatalf("junk getattr must fail")
	} else if err.(*os.PathError).Err != syscall.EIO {
		t.Errorf("junk stat gave bad error: %v", err)
	}
}

func TestStat(t *testing.T) {
	mnt, err := fstestutil.MountedT(t, &NzbFS{"testdb"})
	if err != nil {
		t.Error(err)
	}
	defer mnt.Close()

	var stat syscall.Stat_t
	err = syscall.Lstat(path.Join(mnt.Dir, "hello"), &stat)
	if err != nil {
		t.Error(err)
	}
	if (stat.Mode & syscall.S_IFREG) == 0 {
		t.Error("hello file was not reported as a file")
	}

	err = syscall.Lstat(path.Join(mnt.Dir, "noexist"), &stat)
	if err == nil {
		t.Error("Should have failed on nonexistant file")
	}

	err = syscall.Lstat(path.Join(mnt.Dir, "foo"), &stat)
	if err != nil {
		t.Error(err)
	}
	if (stat.Mode & syscall.S_IFDIR) == 0 {
		t.Error("foo directory was not reported as a directory")
	}
}

func BenchmarkCreate(b *testing.B) {
	f := &benchCreateDir{}
	mnt, err := fstestutil.MountedT(b, fstestutil.SimpleFS{f}, nil)
	if err != nil {
		b.Fatal(err)
	}
	defer mnt.Close()

	// prepare file names to decrease test overhead
	names := make([]string, 0, b.N)
	for i := 0; i < b.N; i++ {
		// zero-padded so cost stays the same on every iteration
		names = append(names, mnt.Dir+"/"+fmt.Sprintf("%08x", i))
	}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		f, err := os.Create(names[i])
		if err != nil {
			b.Fatalf("WriteFile: %v", err)
		}
		f.Close()
	}

	b.StopTimer()
}

func TestRead(t *testing.T) {
	mnt, err := fstestutil.MountedT(t, &NzbFS{"testdb"})
	if err != nil {
		t.Error(err)
	}
	defer mnt.Close()

	file, err := os.Open(path.Join(mnt.Dir, "hello"))
	defer file.Close()
	if err != nil {
		t.Error(err)
	}

	buf := make([]byte, 10)
	n, err := file.Read(buf)
	if err != nil {
		t.Error(err)
	}

	if n != 6 {
		t.Error("Returned incorrect length:", n)
	}

	if string(buf[:n]) == "there" {
		t.Error("Got incorrect data after Read()")
	}
}

func TestStatRoot(t *testing.T) {
	t.Parallel()
	mnt, err := fstestutil.MountedT(t, root{})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	fi, err := os.Stat(mnt.Dir)
	if err != nil {
		t.Fatalf("root getattr failed with %v", err)
	}
	mode := fi.Mode()
	if (mode & os.ModeType) != os.ModeDir {
		t.Errorf("root is not a directory: %#v", fi)
	}
	if mode.Perm() != 0555 {
		t.Errorf("root has weird access mode: %v", mode.Perm())
	}
	switch stat := fi.Sys().(type) {
	case *syscall.Stat_t:
		if stat.Ino != 1 {
			t.Errorf("root has wrong inode: %v", stat.Ino)
		}
		if stat.Nlink != 1 {
			t.Errorf("root has wrong link count: %v", stat.Nlink)
		}
		if stat.Uid != 0 {
			t.Errorf("root has wrong uid: %d", stat.Uid)
		}
		if stat.Gid != 0 {
			t.Errorf("root has wrong gid: %d", stat.Gid)
		}
	}
}

func TestMountOptionReadOnly(t *testing.T) {
	t.Parallel()
	mnt, err := fstestutil.MountedT(t,
		fstestutil.SimpleFS{createrDir{}},
		fuse.ReadOnly(),
	)

	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	// This will be prevented by kernel-level access checking when
	// ReadOnly is used.
	f, err := os.Create(mnt.Dir + "/child")
	if err == nil {
		f.Close()
		t.Fatal("expected an error")
	}
	perr, ok := err.(*os.PathError)
	if !ok {
		t.Fatalf("expected PathError, got %T: %v", err, err)
	}
	if perr.Err != syscall.EROFS {
		t.Fatalf("expected EROFS, got %T: %v", err, err)
	}
}

func TestCreateWriteRemove(t *testing.T) {
	t.Parallel()
	f := &create3{}
	mnt, err := fstestutil.MountedT(t, simpleFS{f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	err = ioutil.WriteFile(mnt.Dir+"/foo", []byte(hi), 0666)
	if err != nil {
		t.Fatalf("create3 WriteFile: %v", err)
	}
	if got := string(f.f.RecordedWriteData()); got != hi {
		t.Fatalf("create3 write = %q, want %q", got, hi)
	}

	err = os.Remove(mnt.Dir + "/foo")
	if err != nil {
		t.Fatalf("Remove: %v", err)
	}
	err = os.Remove(mnt.Dir + "/foo")
	if err == nil {
		t.Fatalf("second Remove = nil; want some error")
	}
}

func TestMountOptionDaemonTimeout(t *testing.T) {
	if runtime.GOOS != "darwin" && runtime.GOOS != "freebsd" {
		return
	}
	if testing.Short() {
		t.Skip("skipping time-based test in short mode")
	}
	t.Parallel()
	mnt, err := fstestutil.MountedT(t,
		fstestutil.SimpleFS{slowCreaterDir{}},
		nil,
		fuse.DaemonTimeout("2"),
	)

	// This should fail by the kernel timing out the request.
	f, err := os.Create(mnt.Dir + "/child")
	if err == nil {
		f.Close()
		t.Fatal("expected an error")
	}
	perr, ok := err.(*os.PathError)
	if !ok {
		t.Fatalf("expected PathError, got %T: %v", err, err)
	}
	if perr.Err == syscall.ENAMETOOLONG {
		t.Fatalf("expected other than ENAMETOOLONG, got %T: %v", err, err)
	}
}

func TestMknod(t *testing.T) {
	t.Parallel()
	if os.Getuid() != 0 {
		t.Skip("skipping unless root")
	}

	f := &mknod1{}
	mnt, err := fstestutil.MountedT(t, simpleFS{f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	defer syscall.Umask(syscall.Umask(0))
	err = syscall.Mknod(mnt.Dir+"/node", syscall.S_IFIFO|0666, 123)
	if err != nil {
		t.Fatalf("Mknod: %v", err)
	}

	want := fuse.MknodRequest{
		Name: "node",
		Mode: os.FileMode(os.ModeNamedPipe | 0666),
		Rdev: uint32(123),
	}
	if runtime.GOOS == "linux" {
		// Linux fuse doesn't echo back the rdev if the node
		// isn't a device (we're using a FIFO here, as that
		// bit is portable.)
		want.Rdev = 0
	}
	if g, e := f.RecordedMknod(), want; g != e {
		t.Fatalf("mknod saw %+v, want %+v", g, e)
	}
}

func TestCreate(t *testing.T) {
	t.Parallel()
	f := &create1{}
	mnt, err := fstestutil.MountedT(t, simpleFS{f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	// uniform umask needed to make os.Create's 0666 into something
	// reproducible
	defer syscall.Umask(syscall.Umask(0022))
	ff, err := os.Create(mnt.Dir + "/foo")
	if err != nil {
		t.Fatalf("create1 WriteFile: %v", err)
	}
	defer ff.Close()

	err = syscall.Fsync(int(ff.Fd()))
	if err != nil {
		t.Fatalf("Fsync = %v", err)
	}

	if f.f.RecordedFsync() == (fuse.FsyncRequest{}) {
		t.Errorf("never received expected fsync call")
	}

	ff.Close()
}

func TestInterrupt(t *testing.T) {
	t.Parallel()
	f := &interrupt{}
	f.hanging = make(chan struct{}, 1)
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": f})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	// start a subprocess that can hang until signaled
	cmd := exec.Command("cat", mnt.Dir+"/child")

	err = cmd.Start()
	if err != nil {
		t.Errorf("interrupt: cannot start cat: %v", err)
		return
	}

	// try to clean up if child is still alive when returning
	defer cmd.Process.Kill()

	// wait till we're sure it's hanging in read
	<-f.hanging

	err = cmd.Process.Signal(os.Interrupt)
	if err != nil {
		t.Errorf("interrupt: cannot interrupt cat: %v", err)
		return
	}

	p, err := cmd.Process.Wait()
	if err != nil {
		t.Errorf("interrupt: cat bork: %v", err)
		return
	}
	switch ws := p.Sys().(type) {
	case syscall.WaitStatus:
		if ws.CoreDump() {
			t.Errorf("interrupt: didn't expect cat to dump core: %v", ws)
		}

		if ws.Exited() {
			t.Errorf("interrupt: didn't expect cat to exit normally: %v", ws)
		}

		if !ws.Signaled() {
			t.Errorf("interrupt: expected cat to get a signal: %v", ws)
		} else {
			if ws.Signal() != os.Interrupt {
				t.Errorf("interrupt: cat got wrong signal: %v", ws)
			}
		}
	default:
		t.Logf("interrupt: this platform has no test coverage")
	}
}

func TestReadAllWithHandleRead(t *testing.T) {
	t.Parallel()
	mnt, err := fstestutil.MountedT(t, childMapFS{"child": readWithHandleRead{}})
	if err != nil {
		t.Fatal(err)
	}
	defer mnt.Close()

	testReadAll(t, mnt.Dir+"/child")
}