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|
//go:build darwin || aix || dragonfly || freebsd || (js && wasm) || linux || netbsd || openbsd || solaris
package fastwalk_test
import (
"io/fs"
"os"
"path/filepath"
"runtime"
"sync"
"testing"
"github.com/charlievieth/fastwalk"
)
func TestDirent(t *testing.T) {
tempdir := t.TempDir()
fileName := filepath.Join(tempdir, "file.txt")
if err := writeFile(fileName, "file.txt", 0644); err != nil {
t.Fatal(err)
}
linkName := filepath.Join(tempdir, "link.link")
if err := symlink(t, filepath.Base(fileName), linkName); err != nil {
t.Fatal(err)
}
// Use fastwalk.Walk to create the dir entries
getDirEnts := func(t *testing.T) (linkEnt, fileEnt fs.DirEntry) {
err := fastwalk.Walk(nil, tempdir, func(path string, d fs.DirEntry, err error) error {
switch path {
case linkName:
linkEnt = d
case fileName:
fileEnt = d
}
return nil
})
if err != nil {
t.Fatal(err)
}
if fileEnt == nil || linkEnt == nil {
t.Fatal("error walking directory")
}
return linkEnt, fileEnt
}
t.Run("Lstat", func(t *testing.T) {
linkEnt, _ := getDirEnts(t)
want, err := os.Lstat(linkName)
if err != nil {
t.Fatal(err)
}
got, err := linkEnt.Info()
if err != nil {
t.Fatal(err)
}
if !os.SameFile(want, got) {
t.Errorf("lstat mismatch\n got:\n%s\nwant:\n%s",
fastwalk.FormatFileInfo(got), fastwalk.FormatFileInfo(want))
}
})
t.Run("Stat", func(t *testing.T) {
_, fileEnt := getDirEnts(t)
want, err := os.Stat(fileName)
if err != nil {
t.Fatal(err)
}
got, err := fastwalk.StatDirEntry(linkName, fileEnt)
if err != nil {
t.Fatal(err)
}
if !os.SameFile(want, got) {
t.Errorf("lstat mismatch\n got:\n%s\nwant:\n%s",
fastwalk.FormatFileInfo(got), fastwalk.FormatFileInfo(want))
}
fi, err := fileEnt.Info()
if err != nil {
t.Fatal(err)
}
if fi != got {
t.Error("failed to return or cache FileInfo")
}
de := fileEnt.(fastwalk.DirEntry)
fi, err = de.Stat()
if err != nil {
t.Fatal(err)
}
if fi != got {
t.Error("failed to use cached Info result for non-symlink")
}
})
t.Run("Parallel", func(t *testing.T) {
testParallel := func(t *testing.T, de fs.DirEntry, fn func() (fs.FileInfo, error)) {
numCPU := runtime.NumCPU()
infos := make([][]fs.FileInfo, numCPU)
for i := range infos {
infos[i] = make([]fs.FileInfo, 100)
}
// Start all the goroutines at the same time to
// maximise the chance of a race
start := make(chan struct{})
var wg, ready sync.WaitGroup
ready.Add(numCPU)
wg.Add(numCPU)
for i := 0; i < numCPU; i++ {
go func(fis []fs.FileInfo, de fs.DirEntry) {
defer wg.Done()
ready.Done()
<-start
for i := range fis {
fis[i], _ = de.Info()
}
}(infos[i], de)
}
ready.Wait()
close(start) // start all goroutines at once
wg.Wait()
first := infos[0][0]
if first == nil {
t.Fatal("failed to stat file:", de.Name())
}
for _, fis := range infos {
for _, fi := range fis {
if fi != first {
t.Errorf("Expected the same fs.FileInfo to always "+
"be returned got: %#v want: %#v", fi, first)
}
}
}
}
t.Run("File", func(t *testing.T) {
t.Run("Stat", func(t *testing.T) {
_, fileEnt := getDirEnts(t)
de := fileEnt.(fastwalk.DirEntry)
testParallel(t, de, de.Stat)
})
t.Run("Lstat", func(t *testing.T) {
_, fileEnt := getDirEnts(t)
de := fileEnt.(fastwalk.DirEntry)
testParallel(t, de, de.Info)
})
})
t.Run("Link", func(t *testing.T) {
t.Run("Stat", func(t *testing.T) {
linkEnt, _ := getDirEnts(t)
de := linkEnt.(fastwalk.DirEntry)
testParallel(t, de, de.Stat)
})
t.Run("Lstat", func(t *testing.T) {
linkEnt, _ := getDirEnts(t)
de := linkEnt.(fastwalk.DirEntry)
testParallel(t, de, de.Info)
})
})
})
}
|
