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// Copyright 2015 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package osutil
import (
"fmt"
"path/filepath"
"strconv"
"sync"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestProcessTempDir(t *testing.T) {
for try := 0; try < 10; try++ {
func() {
tmp := t.TempDir()
const P = 16
// Pre-create half of the instances with stale pid.
var dirs []string
for i := 0; i < P/2; i++ {
dir, err := ProcessTempDir(tmp)
if err != nil {
t.Fatalf("failed to create process temp dir")
}
dirs = append(dirs, dir)
}
for _, dir := range dirs {
if err := WriteFile(filepath.Join(dir, ".pid"), []byte(strconv.Itoa(999999999))); err != nil {
t.Fatalf("failed to write pid file: %v", err)
}
}
// Now request a bunch of instances concurrently.
done := make(chan error)
allDirs := make(map[string]bool)
var mu sync.Mutex
for p := 0; p < P; p++ {
go func() {
dir, err := ProcessTempDir(tmp)
if err != nil {
done <- fmt.Errorf("failed to create temp dir: %w", err)
return
}
mu.Lock()
present := allDirs[dir]
allDirs[dir] = true
mu.Unlock()
if present {
done <- fmt.Errorf("duplicate dir %v", dir)
return
}
done <- nil
}()
}
for p := 0; p < P; p++ {
if err := <-done; err != nil {
t.Error(err)
}
}
}()
}
}
func TestGrepFiles(t *testing.T) {
dir := t.TempDir()
require.NoError(t, FillDirectory(dir, map[string]string{
"a.c": `must be found`,
"a/b.c": `nested`,
"a/b/c.c": `even more nested, must be found`,
"a.txt": `must be found, but has a different extension`,
}))
ret, err := GrepFiles(dir, ".c", []byte(`must be found`))
require.NoError(t, err)
assert.ElementsMatch(t, []string{"a.c", "a/b/c.c"}, ret)
}
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