1package hints
2
3import (
4 "os"
5 "path/filepath"
6 "testing"
7 "time"
8
9 "github.com/stretchr/testify/require"
10
11 "github.com/bnema/neferwl/internal/ports"
12)
13
14// An existing dump directory is made private, and a symlink at a file name is
15// replaced instead of followed.
16func TestWriteDumpPrivate(t *testing.T) {
17 base := t.TempDir()
18 dir := filepath.Join(base, "hints")
19 require.NoError(t, os.Mkdir(dir, 0o755))
20 require.NoError(t, os.Chmod(dir, 0o755))
21 victim := filepath.Join(base, "victim")
22 require.NoError(t, os.WriteFile(victim, []byte("keep"), 0o644))
23 when := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
24 prefix := filepath.Join(dir, when.Format("20060102-150405.000")+"-o")
25 require.NoError(t, os.Symlink(victim, prefix+".json"))
26 pix := make([]byte, 4*4*4)
27 j := &dumpJob{when: when, req: ports.HintScanRequest{Output: "o", Width: 4, Height: 4, Scale: 1}, pix: pix, stride: 16, m: &mapping{}}
28 require.NoError(t, writeDump(dir, j))
29
30 fi, err := os.Stat(dir)
31 require.NoError(t, err)
32 require.Equal(t, os.FileMode(0o700), fi.Mode().Perm())
33 got, err := os.ReadFile(victim)
34 require.NoError(t, err)
35 require.Equal(t, "keep", string(got))
36 li, err := os.Lstat(prefix + ".json")
37 require.NoError(t, err)
38 require.True(t, li.Mode().IsRegular())
39 require.Equal(t, os.FileMode(0o600), li.Mode().Perm())
40}