//go:build linux || darwin

package fileops

import (
	"os"
	"path/filepath"
	"syscall"
	"testing"
)

func TestPromoteDirectoryRejectsNamedPipe(t *testing.T) {
	root := t.TempDir()
	src := filepath.Join(root, "source")
	dst := filepath.Join(root, "destination")
	if err := os.Mkdir(src, 0o755); err != nil {
		t.Fatalf("Mkdir(source) error = %v", err)
	}
	pipe := filepath.Join(src, "events.pipe")
	if err := syscall.Mkfifo(pipe, 0o600); err != nil {
		t.Skipf("Mkfifo() unavailable: %v", err)
	}

	if err := PromoteDirectory(src, dst); err == nil {
		t.Fatal("PromoteDirectory() error = nil, want named pipe rejection")
	}
	info, err := os.Lstat(pipe)
	if err != nil || info.Mode()&os.ModeNamedPipe == 0 {
		t.Fatalf("source named pipe was not preserved: info=%v err=%v", info, err)
	}
	if _, err := os.Lstat(dst); !os.IsNotExist(err) {
		t.Fatalf("Lstat(destination) error = %v, want not exist", err)
	}
	assertNoMatchingTempDirectories(t, root, ".destination.tmp-")
}