| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "os" |
| 5 | "path/filepath" |
| 6 | "testing" |
| 7 | "time" |
| 8 | |
| 9 | "reasonix/internal/agent" |
| 10 | "reasonix/internal/config" |
| 11 | ) |
| 12 | |
| 13 | // TestEnsureTabSessionLeaseForRebuildSurvivesTransientHolder reproduces the |
| 14 | // startup "this session is already open in another Reasonix window" false |
| 15 | // positive: a transient lease holder — CleanupStaleRunning probing a running |
| 16 | // subagent's parent session during a concurrent controller build — holds the |
| 17 | // session lease for a few milliseconds while the tab's own startup bind runs. |
| 18 | // The bind must retry against the genuinely-free lease instead of surfacing a |
| 19 | // spurious ErrSessionLeaseHeld. |
| 20 | func TestEnsureTabSessionLeaseForRebuildSurvivesTransientHolder(t *testing.T) { |
| 21 | isolateDesktopUserDirs(t) |
| 22 | dir := config.SessionDir() |
| 23 | if err := os.MkdirAll(dir, 0o755); err != nil { |
| 24 | t.Fatalf("mkdir sessions: %v", err) |
| 25 | } |
| 26 | path := filepath.Join(dir, "contended-session.jsonl") |
| 27 | |
| 28 | tab := &WorkspaceTab{ID: "tab", Scope: "global", Ready: true, SessionPath: path} |
| 29 | app := &App{ |
| 30 | tabs: map[string]*WorkspaceTab{tab.ID: tab}, |
| 31 | tabOrder: []string{tab.ID}, |
| 32 | } |
| 33 | t.Cleanup(tab.releaseSessionLease) |
| 34 | |
| 35 | // Simulate CleanupStaleRunning's transient parent-session lease probe: |
| 36 | // acquire, hold briefly, then release. The probe targets the same runtime |
| 37 | // key the tab's bind uses (case-folded on Windows), so the contention is |
| 38 | // real on every platform. |
| 39 | key := sessionRuntimeKey(path) |
| 40 | acquired := make(chan struct{}) |
| 41 | releaseProbe := make(chan struct{}) |
| 42 | probeDone := make(chan struct{}) |
| 43 | go func() { |
| 44 | defer close(probeDone) |
| 45 | lease, err := agent.TryAcquireSessionLease(key) |
| 46 | if err != nil { |
| 47 | t.Errorf("probe lease acquire: %v", err) |
| 48 | close(acquired) |
| 49 | return |
| 50 | } |
| 51 | close(acquired) |
| 52 | <-releaseProbe |
| 53 | lease.Release() |
| 54 | }() |
| 55 | |
| 56 | <-acquired // the probe now holds the lease |
| 57 | |
| 58 | bindErr := make(chan error, 1) |
| 59 | go func() { |
| 60 | bindErr <- app.ensureTabSessionLeaseForRebuild(tab, path, "") |
| 61 | }() |
| 62 | |
| 63 | // Give the first bind attempt time to fail against the held lease, then |
| 64 | // release the probe: the bind must succeed on a later attempt. |
| 65 | time.Sleep(50 * time.Millisecond) |
| 66 | close(releaseProbe) |
| 67 | |
| 68 | select { |
| 69 | case err := <-bindErr: |
| 70 | if err != nil { |
| 71 | t.Fatalf("startup bind failed against a transient holder: %v", err) |
| 72 | } |
| 73 | case <-time.After(5 * time.Second): |
| 74 | t.Fatal("startup bind did not complete after the transient holder released") |
| 75 | } |
| 76 | <-probeDone |
| 77 | |
| 78 | if key := tab.sessionLeaseRuntimeKey(); key != sessionRuntimeKey(path) { |
| 79 | t.Fatalf("tab lease key = %q, want %q", key, sessionRuntimeKey(path)) |
| 80 | } |
| 81 | } |
| 82 |