41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
//go:build linux
|
|
|
|
package processlock
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"path/filepath"
|
|
"testing"
|
|
)
|
|
|
|
func TestLockUsesKernelOwnershipAndLeavesFileInPlace(t *testing.T) {
|
|
t.Parallel()
|
|
path := filepath.Join(t.TempDir(), "serve.lock")
|
|
first, err := Acquire(path)
|
|
if err != nil {
|
|
t.Fatalf("acquire first lock: %v", err)
|
|
}
|
|
second, err := Acquire(path)
|
|
if !errors.Is(err, ErrAlreadyLocked) || second != nil {
|
|
t.Fatalf("expected second acquire to fail with lock ownership, lock=%v err=%v", second, err)
|
|
}
|
|
metadata, err := os.ReadFile(path)
|
|
if err != nil || len(metadata) == 0 {
|
|
t.Fatalf("read diagnostic PID: data=%q err=%v", metadata, err)
|
|
}
|
|
if err := first.Close(); err != nil {
|
|
t.Fatalf("release first lock: %v", err)
|
|
}
|
|
if _, err := os.Stat(path); err != nil {
|
|
t.Fatalf("lock file should remain after release: %v", err)
|
|
}
|
|
third, err := Acquire(path)
|
|
if err != nil {
|
|
t.Fatalf("reacquire existing lock file: %v", err)
|
|
}
|
|
if err := third.Close(); err != nil {
|
|
t.Fatalf("release reacquired lock: %v", err)
|
|
}
|
|
}
|