| 1 | //go:build windows |
| 2 | |
| 3 | package installlayout |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "testing" |
| 10 | "time" |
| 11 | |
| 12 | "golang.org/x/sys/windows" |
| 13 | ) |
| 14 | |
| 15 | func silenceRetryDelay(t *testing.T) *[]time.Duration { |
| 16 | t.Helper() |
| 17 | restore := transientRetryDelay |
| 18 | var delays []time.Duration |
| 19 | transientRetryDelay = func(d time.Duration) { delays = append(delays, d) } |
| 20 | t.Cleanup(func() { transientRetryDelay = restore }) |
| 21 | return &delays |
| 22 | } |
| 23 | |
| 24 | func TestRetryTransientRecoversFromScannerLocks(t *testing.T) { |
| 25 | delays := silenceRetryDelay(t) |
| 26 | attempts := 0 |
| 27 | err := retryTransient(func() error { |
| 28 | attempts++ |
| 29 | if attempts < 4 { |
| 30 | return &os.PathError{Op: "rename", Path: "x", Err: windows.ERROR_SHARING_VIOLATION} |
| 31 | } |
| 32 | return nil |
| 33 | }) |
| 34 | if err != nil || attempts != 4 || len(*delays) != 3 { |
| 35 | t.Fatalf("attempts=%d delays=%v err=%v", attempts, *delays, err) |
| 36 | } |
| 37 | if (*delays)[0] != 250*time.Millisecond || (*delays)[2] != 750*time.Millisecond { |
| 38 | t.Fatalf("backoff must grow linearly: %v", *delays) |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | func TestRetryTransientGivesUpAndKeepsTheErrno(t *testing.T) { |
| 43 | delays := silenceRetryDelay(t) |
| 44 | attempts := 0 |
| 45 | err := retryTransient(func() error { |
| 46 | attempts++ |
| 47 | return &os.PathError{Op: "remove", Path: "x", Err: windows.ERROR_ACCESS_DENIED} |
| 48 | }) |
| 49 | if !errors.Is(err, windows.ERROR_ACCESS_DENIED) || attempts != transientRetryAttempts || len(*delays) != transientRetryAttempts-1 { |
| 50 | t.Fatalf("attempts=%d delays=%d err=%v", attempts, len(*delays), err) |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | // Windows refuses to rename a directory while any file inside it is open, |
| 55 | // which is how a scanner briefly blocks displacing an existing version tree. |
| 56 | func TestActivateVersionOutlastsAnOpenHandleInTheReplacedTree(t *testing.T) { |
| 57 | root := t.TempDir() |
| 58 | seed := ActivationRequest{InstallRoot: root, Version: "v1.20.0", RequestID: "seed", Members: writeMembers(t, t.TempDir(), "old")} |
| 59 | if err := ActivateVersion(seed); err != nil { |
| 60 | t.Fatal(err) |
| 61 | } |
| 62 | held, err := os.Open(filepath.Join(root, VersionsDirName, "v1.20.0", DesktopBinaryName())) |
| 63 | if err != nil { |
| 64 | t.Fatal(err) |
| 65 | } |
| 66 | released := make(chan struct{}) |
| 67 | go func() { |
| 68 | time.Sleep(600 * time.Millisecond) |
| 69 | held.Close() |
| 70 | close(released) |
| 71 | }() |
| 72 | err = ActivateVersion(ActivationRequest{InstallRoot: root, Version: "v1.20.0", RequestID: "again", Members: writeMembers(t, t.TempDir(), "new")}) |
| 73 | <-released |
| 74 | if err != nil { |
| 75 | t.Fatalf("activation must wait out a transient handle: %v", err) |
| 76 | } |
| 77 | data, err := os.ReadFile(filepath.Join(root, VersionsDirName, "v1.20.0", DesktopBinaryName())) |
| 78 | if err != nil || string(data) != "new-"+DesktopBinaryName() { |
| 79 | t.Fatalf("replacement not published: %q err=%v", data, err) |
| 80 | } |
| 81 | } |
| 82 |