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// Copyright 2019 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package fs
import (
"bytes"
"context"
"io/ioutil"
"math/rand"
"os"
"syscall"
"testing"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/internal/testutil"
)
func testMount(t *testing.T, root InodeEmbedder, opts *Options) (string, *fuse.Server, func()) {
t.Helper()
mntDir := testutil.TempDir()
if opts == nil {
opts = &Options{
FirstAutomaticIno: 1,
}
}
opts.Debug = testutil.VerboseTest()
server, err := Mount(mntDir, root, opts)
if err != nil {
t.Fatal(err)
}
return mntDir, server, func() {
if err := server.Unmount(); err != nil {
t.Fatalf("testMount: Unmount failed: %v", err)
}
if err := syscall.Rmdir(mntDir); err != nil {
t.Errorf("testMount: Remove failed: %v", err)
}
}
}
func TestDefaultOwner(t *testing.T) {
want := "hello"
root := &Inode{}
mntDir, _, clean := testMount(t, root, &Options{
FirstAutomaticIno: 1,
OnAdd: func(ctx context.Context) {
n := root.EmbeddedInode()
ch := n.NewPersistentInode(
ctx,
&MemRegularFile{
Data: []byte(want),
},
StableAttr{})
n.AddChild("file", ch, false)
},
UID: 42,
GID: 43,
})
defer clean()
var st syscall.Stat_t
if err := syscall.Lstat(mntDir+"/file", &st); err != nil {
t.Fatalf("Lstat: %v", err)
} else if st.Uid != 42 || st.Gid != 43 {
t.Fatalf("Got Lstat %d, %d want 42,43", st.Uid, st.Gid)
}
}
func TestDataFile(t *testing.T) {
want := "hello"
root := &Inode{}
mntDir, _, clean := testMount(t, root, &Options{
FirstAutomaticIno: 1,
OnAdd: func(ctx context.Context) {
n := root.EmbeddedInode()
ch := n.NewPersistentInode(
ctx,
&MemRegularFile{
Data: []byte(want),
Attr: fuse.Attr{
Mode: 0464,
},
},
StableAttr{})
n.AddChild("file", ch, false)
},
})
defer clean()
var st syscall.Stat_t
if err := syscall.Lstat(mntDir+"/file", &st); err != nil {
t.Fatalf("Lstat: %v", err)
}
if want := uint32(syscall.S_IFREG | 0464); st.Mode != want {
t.Errorf("got mode %o, want %o", st.Mode, want)
}
if st.Size != int64(len(want)) || st.Blocks != 8 || st.Blksize != 4096 {
t.Errorf("got %#v, want sz = %d, 8 blocks, 4096 blocksize", st, len(want))
}
fd, err := syscall.Open(mntDir+"/file", syscall.O_RDONLY, 0)
if err != nil {
t.Fatalf("Open: %v", err)
}
var buf [1024]byte
n, err := syscall.Read(fd, buf[:])
if err != nil {
t.Errorf("Read: %v", err)
}
if err := syscall.Close(fd); err != nil {
t.Errorf("Close: %v", err)
}
got := string(buf[:n])
if got != want {
t.Errorf("got %q want %q", got, want)
}
replace := []byte("replaced!")
if err := ioutil.WriteFile(mntDir+"/file", replace, 0644); err != nil {
t.Fatalf("WriteFile: %v", err)
}
if gotBytes, err := ioutil.ReadFile(mntDir + "/file"); err != nil {
t.Fatalf("ReadFile: %v", err)
} else if bytes.Compare(replace, gotBytes) != 0 {
t.Fatalf("read: got %q want %q", gotBytes, replace)
}
}
func TestDataFileLargeRead(t *testing.T) {
root := &Inode{}
data := make([]byte, 256*1024)
rand.Read(data[:])
mntDir, _, clean := testMount(t, root, &Options{
FirstAutomaticIno: 1,
OnAdd: func(ctx context.Context) {
n := root.EmbeddedInode()
ch := n.NewPersistentInode(
ctx,
&MemRegularFile{
Data: data,
Attr: fuse.Attr{
Mode: 0464,
},
},
StableAttr{})
n.AddChild("file", ch, false)
},
})
defer clean()
got, err := ioutil.ReadFile(mntDir + "/file")
if err != nil {
t.Fatalf("ReadFile: %v", err)
}
if !bytes.Equal(got, data) {
t.Errorf("roundtrip read had change")
}
}
type SymlinkerRoot struct {
Inode
}
func (s *SymlinkerRoot) Symlink(ctx context.Context, target, name string, out *fuse.EntryOut) (*Inode, syscall.Errno) {
l := &MemSymlink{
Data: []byte(target),
}
ch := s.NewPersistentInode(ctx, l, StableAttr{Mode: syscall.S_IFLNK})
return ch, 0
}
func TestDataSymlink(t *testing.T) {
root := &SymlinkerRoot{}
mntDir, _, clean := testMount(t, root, nil)
defer clean()
if err := syscall.Symlink("target", mntDir+"/link"); err != nil {
t.Fatalf("Symlink: %v", err)
}
if got, err := os.Readlink(mntDir + "/link"); err != nil {
t.Fatalf("Readlink: %v", err)
} else if want := "target"; got != want {
t.Errorf("Readlink: got %q want %q", got, want)
}
}
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