| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "sync/atomic" |
| 5 | "testing" |
| 6 | |
| 7 | "reasonix/internal/event" |
| 8 | ) |
| 9 | |
| 10 | type countedRuntimeReader struct { |
| 11 | bindingRuntimeReader |
| 12 | reads atomic.Int32 |
| 13 | } |
| 14 | |
| 15 | func (r *countedRuntimeReader) RuntimeStateSnapshot() event.RuntimeStateSnapshot { |
| 16 | r.reads.Add(1) |
| 17 | return r.bindingRuntimeReader.RuntimeStateSnapshot() |
| 18 | } |
| 19 | |
| 20 | func TestRuntimeStateUpdateDoesNotResampleUnchangedBindings(t *testing.T) { |
| 21 | isolateDesktopUserDirs(t) |
| 22 | first, second := &countedRuntimeReader{}, &countedRuntimeReader{} |
| 23 | first.state = event.RuntimeStateSnapshot{SchemaVersion: 1, RuntimeEpoch: "first", Revision: 1} |
| 24 | second.state = event.RuntimeStateSnapshot{SchemaVersion: 1, RuntimeEpoch: "second", Revision: 1} |
| 25 | a := &WorkspaceTab{ID: "a", Ctrl: first} |
| 26 | b := &WorkspaceTab{ID: "b", Ctrl: second} |
| 27 | app := &App{tabs: map[string]*WorkspaceTab{"a": a, "b": b}} |
| 28 | app.GetRuntimeStateSnapshot() |
| 29 | for revision := uint64(2); revision <= 20; revision++ { |
| 30 | state := first.state |
| 31 | state.Revision = revision |
| 32 | app.runtimeStateSnapshotWithUpdate(&localRuntimeUpdate{tab: a, ctrl: first, state: state}) |
| 33 | } |
| 34 | if first.reads.Load() != 1 || second.reads.Load() != 1 { |
| 35 | t.Fatal("incremental update sampled unrelated controllers") |
| 36 | } |
| 37 | app.GetRuntimeStateSnapshot() |
| 38 | if second.reads.Load() != 2 { |
| 39 | t.Fatal("explicit reconciliation did not sample the owner") |
| 40 | } |
| 41 | // An older callback must not regress an already-published producer revision. |
| 42 | result := app.runtimeStateSnapshotWithUpdate(&localRuntimeUpdate{tab: a, ctrl: first, state: first.state}) |
| 43 | if result.Sessions[0].State.Revision != 20 { |
| 44 | t.Fatal("late callback regressed the projection") |
| 45 | } |
| 46 | replacement := &countedRuntimeReader{} |
| 47 | replacement.state = event.RuntimeStateSnapshot{RuntimeEpoch: "replacement", Revision: 1} |
| 48 | app.mu.Lock() |
| 49 | b.Ctrl = replacement |
| 50 | app.mu.Unlock() |
| 51 | app.runtimeStateSnapshotWithUpdate(&localRuntimeUpdate{tab: a, ctrl: first, state: first.state}) |
| 52 | if replacement.reads.Load() != 1 { |
| 53 | t.Fatal("replacement inherited the old binding cache") |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | func TestRuntimeStateQueuedUpdatesKeepNewestAndFenceRebinding(t *testing.T) { |
| 58 | isolateDesktopUserDirs(t) |
| 59 | reader := &countedRuntimeReader{} |
| 60 | reader.state = event.RuntimeStateSnapshot{RuntimeEpoch: "owner", Revision: 1} |
| 61 | tab := &WorkspaceTab{ID: "a", Ctrl: reader} |
| 62 | app := &App{tabs: map[string]*WorkspaceTab{"a": tab}} |
| 63 | app.GetRuntimeStateSnapshot() |
| 64 | // Prevent the worker from sampling while all producers enqueue their cut. |
| 65 | app.mu.Lock() |
| 66 | for revision := uint64(100); revision > 1; revision-- { |
| 67 | state := reader.state |
| 68 | state.Revision = revision |
| 69 | app.queueRuntimeProjection(localRuntimeUpdate{tab: tab, ctrl: reader, state: state}) |
| 70 | } |
| 71 | app.mu.Unlock() |
| 72 | app.flushRuntimeProjections() |
| 73 | projection := app.runtimeStateSnapshotWithUpdate(&localRuntimeUpdate{tab: tab, ctrl: reader, state: reader.state}) |
| 74 | if projection.Sessions[0].State.Revision != 100 || reader.reads.Load() != 1 { |
| 75 | t.Fatal("batched callbacks lost the newest revision or resampled the owner") |
| 76 | } |
| 77 | // A queued callback may outlive a same-controller session rebind. |
| 78 | app.mu.Lock() |
| 79 | tab.SessionGeneration = 2 |
| 80 | tab.SessionPath, tab.SessionID = "session:new", "new" |
| 81 | app.mu.Unlock() |
| 82 | projection = app.runtimeStateSnapshotWithUpdate(&localRuntimeUpdate{tab: tab, ctrl: reader, |
| 83 | state: event.RuntimeStateSnapshot{RuntimeEpoch: "obsolete", Revision: 999}}) |
| 84 | if projection.Sessions[0].State.RuntimeEpoch == "obsolete" || reader.reads.Load() != 2 { |
| 85 | t.Fatal("obsolete callback crossed the binding generation fence") |
| 86 | } |
| 87 | app.shuttingDown.Store(true) |
| 88 | app.queueRuntimeProjection(localRuntimeUpdate{tab: tab, ctrl: reader}) |
| 89 | if app.runtimeStateProjection.events.done != nil { |
| 90 | t.Fatal("shutdown admitted another projection worker") |
| 91 | } |
| 92 | } |
| 93 |