| 1 | package pathidentity |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "testing" |
| 8 | ) |
| 9 | |
| 10 | func TestResolveAllowsCreationBetweenFilesystemObservations(t *testing.T) { |
| 11 | for _, tail := range []string{"state.lock", filepath.Join("new", "state.lock")} { |
| 12 | t.Run(tail, func(t *testing.T) { |
| 13 | root := t.TempDir() |
| 14 | path := filepath.Join(root, tail) |
| 15 | created := false |
| 16 | got, err := resolveThroughExistingAncestorWith(path, func(current string) (string, error) { |
| 17 | resolved, resolveErr := filepath.EvalSymlinks(current) |
| 18 | if !created { |
| 19 | created = true |
| 20 | if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil { |
| 21 | t.Fatal(err) |
| 22 | } |
| 23 | if err := os.WriteFile(path, nil, 0o600); err != nil { |
| 24 | t.Fatal(err) |
| 25 | } |
| 26 | } |
| 27 | return resolved, resolveErr |
| 28 | }) |
| 29 | if err != nil { |
| 30 | t.Fatalf("concurrent creation rejected: %v", err) |
| 31 | } |
| 32 | want, err := filepath.EvalSymlinks(path) |
| 33 | if err != nil || !created || got != want { |
| 34 | t.Fatalf("resolved = %q, want %q; created=%v, err=%v", got, want, created, err) |
| 35 | } |
| 36 | }) |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | func TestResolveRejectsDanglingAncestorAndLeaf(t *testing.T) { |
| 41 | root := t.TempDir() |
| 42 | link := filepath.Join(root, "dangling") |
| 43 | if err := os.Symlink(filepath.Join(root, "absent"), link); err != nil { |
| 44 | t.Skipf("symlink unavailable: %v", err) |
| 45 | } |
| 46 | for _, path := range []string{link, filepath.Join(link, "state.lock")} { |
| 47 | _, err := Resolve(path, Options{FollowLeaf: true}) |
| 48 | var identityErr *Error |
| 49 | if !errors.As(err, &identityErr) || identityErr.Kind != ErrorUnavailable { |
| 50 | t.Fatalf("Resolve(%q) = %v, want unavailable", path, err) |
| 51 | } |
| 52 | } |
| 53 | } |
| 54 |