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// Copyright 2016 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 nodefs
import (
"io/ioutil"
"testing"
"github.com/hanwen/go-fuse/fuse"
)
type nodeReadNode struct {
Node
dir bool
noOpen bool
data []byte
}
func newNodeReadNode(noOpen, dir bool, d []byte) *nodeReadNode {
return &nodeReadNode{
Node: NewDefaultNode(),
noOpen: noOpen,
dir: dir,
data: d,
}
}
func (n *nodeReadNode) Open(flags uint32, context *fuse.Context) (file File, code fuse.Status) {
if n.noOpen {
return nil, fuse.ENOSYS
}
return nil, fuse.OK
}
func (n *nodeReadNode) Read(file File, dest []byte, off int64, context *fuse.Context) (fuse.ReadResult, fuse.Status) {
e := off + int64(len(dest))
if int(e) > len(n.data) {
e = int64(len(n.data))
}
return fuse.ReadResultData(n.data[off:int(e)]), fuse.OK
}
func (n *nodeReadNode) GetAttr(out *fuse.Attr, file File, context *fuse.Context) (code fuse.Status) {
if n.dir {
out.Mode = fuse.S_IFDIR | 0755
} else {
out.Mode = fuse.S_IFREG | 0644
}
out.Size = uint64(len(n.data))
return fuse.OK
}
func (n *nodeReadNode) Lookup(out *fuse.Attr, name string, context *fuse.Context) (*Inode, fuse.Status) {
ch := n.Inode().NewChild(name, false, newNodeReadNode(n.noOpen, false, []byte(name)))
return ch, ch.Node().GetAttr(out, nil, context)
}
func TestNoOpen(t *testing.T) {
dir, err := ioutil.TempDir("", "nodefs")
if err != nil {
t.Fatalf("TempDir: %v", err)
}
root := newNodeReadNode(true, true, nil)
root.noOpen = true
s, _, err := MountRoot(dir, root, &Options{Debug: VerboseTest()})
if err != nil {
t.Fatalf("MountRoot: %v", err)
}
defer s.Unmount()
go s.Serve()
if err := s.WaitMount(); err != nil {
t.Fatal("WaitMount", err)
}
if s.KernelSettings().Minor < 23 {
t.Skip("Kernel does not support open-less read/writes. Skipping test.")
}
content, err := ioutil.ReadFile(dir + "/file")
if err != nil {
t.Fatalf("ReadFile: %v", err)
}
want := "file"
if string(content) != want {
t.Fatalf("got %q, want %q", content, want)
}
content, err = ioutil.ReadFile(dir + "/file2")
if err != nil {
t.Fatalf("ReadFile: %v", err)
}
want = "file2"
if string(content) != want {
t.Fatalf("got %q, want %q", content, want)
}
}
func TestNodeRead(t *testing.T) {
dir, err := ioutil.TempDir("", "nodefs")
if err != nil {
t.Fatalf("TempDir: %v", err)
}
root := newNodeReadNode(false, true, nil)
opts := NewOptions()
opts.Debug = VerboseTest()
s, _, err := MountRoot(dir, root, opts)
if err != nil {
t.Fatalf("MountRoot: %v", err)
}
defer s.Unmount()
go s.Serve()
if err := s.WaitMount(); err != nil {
t.Fatal("WaitMount", err)
}
content, err := ioutil.ReadFile(dir + "/file")
if err != nil {
t.Fatalf("ReadFile: %v", err)
}
want := "file"
if string(content) != want {
t.Fatalf("got %q, want %q", content, want)
}
}
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