| 1 | package pathidentity |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "testing" |
| 8 | ) |
| 9 | |
| 10 | func TestResolveRejectsEmptyAndUnboundRelativePaths(t *testing.T) { |
| 11 | for _, path := range []string{"", " ", "relative"} { |
| 12 | _, err := Resolve(path, Options{FollowLeaf: true}) |
| 13 | var identityErr *Error |
| 14 | if !errors.As(err, &identityErr) || identityErr.Kind != ErrorInvalid { |
| 15 | t.Fatalf("Resolve(%q) error = %v", path, err) |
| 16 | } |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | func TestResolveMissingTailThroughSymlink(t *testing.T) { |
| 21 | realParent := t.TempDir() |
| 22 | aliasParent := filepath.Join(t.TempDir(), "alias") |
| 23 | if err := os.Symlink(realParent, aliasParent); err != nil { |
| 24 | t.Skipf("symlink unavailable: %v", err) |
| 25 | } |
| 26 | realPhysical, err := filepath.EvalSymlinks(realParent) |
| 27 | if err != nil { |
| 28 | t.Fatal(err) |
| 29 | } |
| 30 | want := filepath.Join(realPhysical, "missing", "leaf") |
| 31 | got, err := Resolve(filepath.Join(aliasParent, "missing", "leaf"), Options{FollowLeaf: true}) |
| 32 | if err != nil { |
| 33 | t.Fatal(err) |
| 34 | } |
| 35 | if got.PhysicalPath != want { |
| 36 | t.Fatalf("PhysicalPath = %q, want %q", got.PhysicalPath, want) |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | func TestResolveCanPreserveLeafSymlink(t *testing.T) { |
| 41 | dir := t.TempDir() |
| 42 | target := filepath.Join(dir, "target") |
| 43 | link := filepath.Join(dir, "link") |
| 44 | if err := os.Mkdir(target, 0o700); err != nil { |
| 45 | t.Fatal(err) |
| 46 | } |
| 47 | if err := os.Symlink(target, link); err != nil { |
| 48 | t.Skipf("symlink unavailable: %v", err) |
| 49 | } |
| 50 | followed, err := Resolve(link, Options{FollowLeaf: true}) |
| 51 | if err != nil { |
| 52 | t.Fatal(err) |
| 53 | } |
| 54 | preserved, err := Resolve(link, Options{FollowLeaf: false}) |
| 55 | if err != nil { |
| 56 | t.Fatal(err) |
| 57 | } |
| 58 | physicalDir, err := filepath.EvalSymlinks(dir) |
| 59 | if err != nil { |
| 60 | t.Fatal(err) |
| 61 | } |
| 62 | if followed.PhysicalPath != filepath.Join(physicalDir, "target") || preserved.PhysicalPath != filepath.Join(physicalDir, "link") { |
| 63 | t.Fatalf("followed=%q preserved=%q", followed.PhysicalPath, preserved.PhysicalPath) |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | func TestSameUsesPhysicalIdentity(t *testing.T) { |
| 68 | dir := t.TempDir() |
| 69 | alias := filepath.Join(t.TempDir(), "alias") |
| 70 | if err := os.Symlink(dir, alias); err != nil { |
| 71 | t.Skipf("symlink unavailable: %v", err) |
| 72 | } |
| 73 | same, err := Same(dir, alias, Options{FollowLeaf: true}) |
| 74 | if err != nil || !same { |
| 75 | t.Fatalf("Same = %v, %v", same, err) |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | func TestResolveIdentityIsStableAcrossMissingTailCreation(t *testing.T) { |
| 80 | path := filepath.Join(t.TempDir(), "new", "workspace") |
| 81 | before, err := Resolve(path, Options{FollowLeaf: true}) |
| 82 | if err != nil { |
| 83 | t.Fatal(err) |
| 84 | } |
| 85 | if err := os.MkdirAll(path, 0o700); err != nil { |
| 86 | t.Fatal(err) |
| 87 | } |
| 88 | after, err := Resolve(path, Options{FollowLeaf: true}) |
| 89 | if err != nil { |
| 90 | t.Fatal(err) |
| 91 | } |
| 92 | if before.Key != after.Key { |
| 93 | t.Fatalf("identity changed after creation: %q != %q", before.Key, after.Key) |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | func TestResolveReportsLinkLoop(t *testing.T) { |
| 98 | dir := t.TempDir() |
| 99 | left, right := filepath.Join(dir, "left"), filepath.Join(dir, "right") |
| 100 | if err := os.Symlink(right, left); err != nil { |
| 101 | t.Skipf("symlink unavailable: %v", err) |
| 102 | } |
| 103 | if err := os.Symlink(left, right); err != nil { |
| 104 | t.Fatal(err) |
| 105 | } |
| 106 | _, err := Resolve(left, Options{FollowLeaf: true}) |
| 107 | var identityErr *Error |
| 108 | if !errors.As(err, &identityErr) || identityErr.Kind != ErrorLinkLoop { |
| 109 | t.Fatalf("error = %v", err) |
| 110 | } |
| 111 | } |
| 112 |