| 1 | package workspacelease |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "reflect" |
| 10 | "strings" |
| 11 | "testing" |
| 12 | "time" |
| 13 | |
| 14 | "reasonix/internal/filelock" |
| 15 | ) |
| 16 | |
| 17 | func collidingRootOwners(t *testing.T) (string, *Owner, *Owner) { |
| 18 | t.Helper() |
| 19 | base, err := CanonicalWorkspace(t.TempDir()) |
| 20 | if err != nil { |
| 21 | t.Fatal(err) |
| 22 | } |
| 23 | locks := t.TempDir() |
| 24 | seen := map[string]*Owner{} |
| 25 | for i := range treeLockStripes + 1 { |
| 26 | owner, err := New(filepath.Join(base, fmt.Sprintf("root-%d", i)), locks, nil) |
| 27 | if err != nil { |
| 28 | t.Fatal(err) |
| 29 | } |
| 30 | slot := owner.treeLockPath(owner.canonical) |
| 31 | if first := seen[slot]; first != nil { |
| 32 | for _, root := range []string{first.canonical, owner.canonical} { |
| 33 | if err := os.MkdirAll(root, 0o700); err != nil { |
| 34 | t.Fatal(err) |
| 35 | } |
| 36 | } |
| 37 | return locks, first, owner |
| 38 | } |
| 39 | seen[slot] = owner |
| 40 | } |
| 41 | t.Fatal("no tree stripe collision found") |
| 42 | return "", nil, nil |
| 43 | } |
| 44 | |
| 45 | func TestRootGroupCoalescesCollidingTreeStripes(t *testing.T) { |
| 46 | locks, first, second := collidingRootOwners(t) |
| 47 | ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| 48 | defer cancel() |
| 49 | release, err := HoldWriteRoots(ctx, locks, first.canonical, second.canonical) |
| 50 | if err != nil { |
| 51 | t.Fatalf("group waited for its own tree stripe: %v", err) |
| 52 | } |
| 53 | defer release() |
| 54 | for _, owner := range []*Owner{first, second} { |
| 55 | if unlock, err := filelock.TryAcquire(owner.lockPath); !errors.Is(err, filelock.ErrHeld) { |
| 56 | if unlock != nil { |
| 57 | unlock() |
| 58 | } |
| 59 | t.Fatalf("group omitted legacy workspace protection: %v", err) |
| 60 | } |
| 61 | } |
| 62 | blocked, stop := context.WithTimeout(context.Background(), 30*time.Millisecond) |
| 63 | defer stop() |
| 64 | if unlock, err := second.HoldWrite(blocked); !errors.Is(err, context.DeadlineExceeded) { |
| 65 | if unlock != nil { |
| 66 | unlock() |
| 67 | } |
| 68 | t.Fatalf("independent owner bypassed group: %v", err) |
| 69 | } |
| 70 | release() |
| 71 | release() // Group release is idempotent. |
| 72 | for _, owner := range []*Owner{first, second} { |
| 73 | unlock, err := owner.HoldWrite(ctx) |
| 74 | if err != nil { |
| 75 | t.Fatalf("group leaked lease: %v", err) |
| 76 | } |
| 77 | unlock() |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | func TestRootGroupCancellationReleasesPartialCompatibilityHolds(t *testing.T) { |
| 82 | locks, first, second := collidingRootOwners(t) |
| 83 | holdTree, err := filelock.TryAcquire(first.treeLockPath(first.canonical)) |
| 84 | if err != nil { |
| 85 | t.Fatal(err) |
| 86 | } |
| 87 | defer holdTree() |
| 88 | ctx, cancel := context.WithTimeout(context.Background(), 30*time.Millisecond) |
| 89 | defer cancel() |
| 90 | if release, err := HoldWriteRoots(ctx, locks, first.canonical, second.canonical); !errors.Is(err, context.DeadlineExceeded) { |
| 91 | if release != nil { |
| 92 | release() |
| 93 | } |
| 94 | t.Fatalf("group did not honor cancellation: %v", err) |
| 95 | } |
| 96 | for _, owner := range []*Owner{first, second} { |
| 97 | unlock, err := filelock.TryAcquire(owner.lockPath) |
| 98 | if err != nil { |
| 99 | t.Fatalf("cancelled group leaked compatibility lock: %v", err) |
| 100 | } |
| 101 | unlock() |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | func TestRootGroupRejectsLinkRedirectAfterLockAcquisition(t *testing.T) { |
| 106 | root := t.TempDir() |
| 107 | first, second := filepath.Join(root, "first"), filepath.Join(root, "second") |
| 108 | if err := os.Mkdir(first, 0o700); err != nil { |
| 109 | t.Fatal(err) |
| 110 | } |
| 111 | if err := os.Mkdir(second, 0o700); err != nil { |
| 112 | t.Fatal(err) |
| 113 | } |
| 114 | alias := filepath.Join(root, "alias") |
| 115 | if err := os.Symlink(first, alias); err != nil { |
| 116 | t.Skipf("symlink unavailable: %v", err) |
| 117 | } |
| 118 | original := workspaceRootsAfterAcquire |
| 119 | workspaceRootsAfterAcquire = func() { |
| 120 | if err := os.Remove(alias); err != nil { |
| 121 | t.Fatal(err) |
| 122 | } |
| 123 | if err := os.Symlink(second, alias); err != nil { |
| 124 | t.Fatal(err) |
| 125 | } |
| 126 | } |
| 127 | t.Cleanup(func() { workspaceRootsAfterAcquire = original }) |
| 128 | release, err := HoldWriteRoots(t.Context(), t.TempDir(), alias) |
| 129 | if release != nil { |
| 130 | release() |
| 131 | } |
| 132 | if err == nil || !strings.Contains(err.Error(), "identity changed") { |
| 133 | t.Fatalf("error = %v", err) |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | func TestRootGroupPromotesRequestedAncestorAndOrdersBothDirections(t *testing.T) { |
| 138 | parent := t.TempDir() |
| 139 | child := filepath.Join(parent, "child") |
| 140 | if err := os.Mkdir(child, 0o700); err != nil { |
| 141 | t.Fatal(err) |
| 142 | } |
| 143 | locks := t.TempDir() |
| 144 | _, forward, err := rootLockDomains(locks, []string{parent, child}) |
| 145 | if err != nil { |
| 146 | t.Fatal(err) |
| 147 | } |
| 148 | _, reverse, err := rootLockDomains(locks, []string{child, parent, parent}) |
| 149 | if err != nil || !reflect.DeepEqual(forward, reverse) { |
| 150 | t.Fatalf("group ordering depends on caller order: %v", err) |
| 151 | } |
| 152 | ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| 153 | defer cancel() |
| 154 | release, err := HoldWriteRoots(ctx, locks, child, parent) |
| 155 | if err != nil { |
| 156 | t.Fatalf("group reacquired its ancestor: %v", err) |
| 157 | } |
| 158 | defer release() |
| 159 | owner, err := New(parent, locks, nil) |
| 160 | if err != nil { |
| 161 | t.Fatal(err) |
| 162 | } |
| 163 | if unlock, err := filelock.TryAcquire(owner.lockPath); !errors.Is(err, filelock.ErrHeld) { |
| 164 | if unlock != nil { |
| 165 | unlock() |
| 166 | } |
| 167 | t.Fatalf("ancestor was not exclusive: %v", err) |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | func TestRootGroupRejectsCancelledContextWithFreeLocks(t *testing.T) { |
| 172 | root, locks := t.TempDir(), t.TempDir() |
| 173 | ctx, cancel := context.WithCancel(context.Background()) |
| 174 | cancel() |
| 175 | if release, err := HoldWriteRoots(ctx, locks, root); !errors.Is(err, context.Canceled) { |
| 176 | if release != nil { |
| 177 | release() |
| 178 | } |
| 179 | t.Fatalf("cancelled group acquired free locks: %v", err) |
| 180 | } |
| 181 | } |
| 182 |