| 1 | package identitylock |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | ) |
| 10 | |
| 11 | func TestAliasPathsShareLocalIdentity(t *testing.T) { |
| 12 | dir := t.TempDir() |
| 13 | realDir := filepath.Join(dir, "real") |
| 14 | if err := os.Mkdir(realDir, 0o755); err != nil { |
| 15 | t.Fatal(err) |
| 16 | } |
| 17 | aliasDir := filepath.Join(dir, "alias") |
| 18 | if err := os.Symlink(realDir, aliasDir); err != nil { |
| 19 | t.Skipf("symlink unavailable: %v", err) |
| 20 | } |
| 21 | release, err := TryAcquire(filepath.Join(realDir, "state.lock")) |
| 22 | if err != nil { |
| 23 | t.Fatal(err) |
| 24 | } |
| 25 | defer release() |
| 26 | if aliasRelease, err := TryAcquire(filepath.Join(aliasDir, "state.lock")); !errors.Is(err, ErrHeld) { |
| 27 | if aliasRelease != nil { |
| 28 | aliasRelease() |
| 29 | } |
| 30 | t.Fatalf("alias acquire error = %v, want ErrHeld", err) |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | func TestAcquireRejectsLinkRedirectAfterIdentityResolution(t *testing.T) { |
| 35 | dir := t.TempDir() |
| 36 | first := filepath.Join(dir, "first") |
| 37 | second := filepath.Join(dir, "second") |
| 38 | if err := os.Mkdir(first, 0o755); err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | if err := os.Mkdir(second, 0o755); err != nil { |
| 42 | t.Fatal(err) |
| 43 | } |
| 44 | alias := filepath.Join(dir, "alias") |
| 45 | if err := os.Symlink(first, alias); err != nil { |
| 46 | t.Skipf("symlink unavailable: %v", err) |
| 47 | } |
| 48 | originalHook := identityLockAfterResolve |
| 49 | identityLockAfterResolve = func() { |
| 50 | identityLockAfterResolve = originalHook |
| 51 | if err := os.Remove(alias); err != nil { |
| 52 | t.Fatal(err) |
| 53 | } |
| 54 | if err := os.Symlink(second, alias); err != nil { |
| 55 | t.Fatal(err) |
| 56 | } |
| 57 | } |
| 58 | defer func() { identityLockAfterResolve = originalHook }() |
| 59 | |
| 60 | release, err := Acquire(context.Background(), filepath.Join(alias, "state.lock")) |
| 61 | if release != nil { |
| 62 | release() |
| 63 | } |
| 64 | if err == nil || err.Error() != "file lock identity changed while acquiring" { |
| 65 | t.Fatalf("Acquire error = %v, want identity change", err) |
| 66 | } |
| 67 | next, nextErr := TryAcquire(filepath.Join(second, "state.lock")) |
| 68 | if nextErr != nil { |
| 69 | t.Fatalf("lock remained held after rejected redirect: %v", nextErr) |
| 70 | } |
| 71 | next() |
| 72 | } |
| 73 |