mirror of https://github.com/octoleo/restic.git
142 lines
3.4 KiB
Go
142 lines
3.4 KiB
Go
package fstestutil
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import (
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"errors"
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"io/ioutil"
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"log"
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"os"
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"testing"
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"time"
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"bazil.org/fuse"
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"bazil.org/fuse/fs"
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)
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// Mount contains information about the mount for the test to use.
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type Mount struct {
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// Dir is the temporary directory where the filesystem is mounted.
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Dir string
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Conn *fuse.Conn
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Server *fs.Server
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// Error will receive the return value of Serve.
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Error <-chan error
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done <-chan struct{}
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closed bool
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}
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// Close unmounts the filesystem and waits for fs.Serve to return. Any
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// returned error will be stored in Err. It is safe to call Close
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// multiple times.
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func (mnt *Mount) Close() {
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if mnt.closed {
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return
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}
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mnt.closed = true
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for tries := 0; tries < 1000; tries++ {
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err := fuse.Unmount(mnt.Dir)
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if err != nil {
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// TODO do more than log?
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log.Printf("unmount error: %v", err)
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time.Sleep(10 * time.Millisecond)
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continue
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}
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break
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}
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<-mnt.done
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mnt.Conn.Close()
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os.Remove(mnt.Dir)
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}
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// MountedFunc mounts a filesystem at a temporary directory. The
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// filesystem used is constructed by calling a function, to allow
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// storing fuse.Conn and fs.Server in the FS.
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//
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// It also waits until the filesystem is known to be visible (OS X
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// workaround).
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//
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// After successful return, caller must clean up by calling Close.
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func MountedFunc(fn func(*Mount) fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
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dir, err := ioutil.TempDir("", "fusetest")
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if err != nil {
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return nil, err
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}
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c, err := fuse.Mount(dir, options...)
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if err != nil {
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return nil, err
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}
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server := fs.New(c, conf)
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done := make(chan struct{})
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serveErr := make(chan error, 1)
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mnt := &Mount{
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Dir: dir,
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Conn: c,
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Server: server,
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Error: serveErr,
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done: done,
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}
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filesys := fn(mnt)
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go func() {
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defer close(done)
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serveErr <- server.Serve(filesys)
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}()
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select {
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case <-mnt.Conn.Ready:
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if err := mnt.Conn.MountError; err != nil {
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return nil, err
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}
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return mnt, nil
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case err = <-mnt.Error:
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// Serve quit early
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if err != nil {
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return nil, err
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}
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return nil, errors.New("Serve exited early")
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}
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}
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// Mounted mounts the fuse.Server at a temporary directory.
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//
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// It also waits until the filesystem is known to be visible (OS X
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// workaround).
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//
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// After successful return, caller must clean up by calling Close.
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func Mounted(filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
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fn := func(*Mount) fs.FS { return filesys }
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return MountedFunc(fn, conf, options...)
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}
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// MountedFuncT mounts a filesystem at a temporary directory,
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// directing it's debug log to the testing logger.
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//
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// See MountedFunc for usage.
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//
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// The debug log is not enabled by default. Use `-fuse.debug` or call
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// DebugByDefault to enable.
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func MountedFuncT(t testing.TB, fn func(*Mount) fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
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if conf == nil {
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conf = &fs.Config{}
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}
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if debug && conf.Debug == nil {
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conf.Debug = func(msg interface{}) {
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t.Logf("FUSE: %s", msg)
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}
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}
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return MountedFunc(fn, conf, options...)
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}
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// MountedT mounts the filesystem at a temporary directory,
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// directing it's debug log to the testing logger.
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//
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// See Mounted for usage.
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//
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// The debug log is not enabled by default. Use `-fuse.debug` or call
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// DebugByDefault to enable.
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func MountedT(t testing.TB, filesys fs.FS, conf *fs.Config, options ...fuse.MountOption) (*Mount, error) {
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fn := func(*Mount) fs.FS { return filesys }
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return MountedFuncT(t, fn, conf, options...)
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}
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