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| 1 | package safefile |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "io" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | ) |
| 10 | |
| 11 | func TestPlan14DurableWriteInterruptedSync(t *testing.T) { |
| 12 | for _, point := range []string{"file-sync", "parent-sync"} { |
| 13 | t.Run(point, func(t *testing.T) { |
| 14 | dir := t.TempDir() |
| 15 | path := filepath.Join(dir, "floor") |
| 16 | if err := os.WriteFile(path, []byte("old"), 0600); err != nil { |
| 17 | t.Fatal(err) |
| 18 | } |
| 19 | fd, err := OpenDir(dir) |
| 20 | if err != nil { |
| 21 | t.Fatal(err) |
| 22 | } |
| 23 | defer fd.Close() |
| 24 | interrupted := errors.New("sync interrupted") |
| 25 | err = writeAtSteps(int(fd.Fd()), "floor", 0600, func(w io.Writer) error { _, e := w.Write([]byte("new")); return e }, func(stage string, op func() error) error { |
| 26 | if e := op(); e != nil { |
| 27 | return e |
| 28 | } |
| 29 | if stage == point { |
| 30 | return interrupted |
| 31 | } |
| 32 | return nil |
| 33 | }) |
| 34 | if !errors.Is(err, interrupted) { |
| 35 | t.Fatal("lost durability failure", err) |
| 36 | } |
| 37 | body, err := os.ReadFile(path) |
| 38 | if err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | want := "old" |
| 42 | if point == "parent-sync" { |
| 43 | want = "new" |
| 44 | } |
| 45 | if string(body) != want { |
| 46 | t.Fatal("publication crossed unsynced boundary", string(body)) |
| 47 | } |
| 48 | if err := WriteAt(int(fd.Fd()), "floor", []byte("new"), 0600); err != nil { |
| 49 | t.Fatal("retry", err) |
| 50 | } |
| 51 | }) |
| 52 | } |
| 53 | } |
| 54 | |
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