| 1 | package agent |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "sync" |
| 6 | "sync/atomic" |
| 7 | "testing" |
| 8 | "time" |
| 9 | ) |
| 10 | |
| 11 | func TestSchedulerTotalConcurrencyQueues(t *testing.T) { |
| 12 | s := NewSubagentScheduler(2, 2) |
| 13 | root := t.TempDir() |
| 14 | var started atomic.Int32 |
| 15 | var max atomic.Int32 |
| 16 | var wg sync.WaitGroup |
| 17 | barrier := make(chan struct{}) |
| 18 | |
| 19 | for i := 0; i < 4; i++ { |
| 20 | wg.Add(1) |
| 21 | go func() { |
| 22 | defer wg.Done() |
| 23 | release, err := s.Acquire(context.Background(), AcquireRequest{Writer: false}) |
| 24 | if err != nil { |
| 25 | t.Errorf("acquire: %v", err) |
| 26 | return |
| 27 | } |
| 28 | cur := started.Add(1) |
| 29 | for { |
| 30 | old := max.Load() |
| 31 | if cur <= old || max.CompareAndSwap(old, cur) { |
| 32 | break |
| 33 | } |
| 34 | } |
| 35 | <-barrier |
| 36 | started.Add(-1) |
| 37 | release() |
| 38 | }() |
| 39 | } |
| 40 | |
| 41 | // Wait until at least 2 are running, then release them. |
| 42 | deadline := time.Now().Add(2 * time.Second) |
| 43 | for time.Now().Before(deadline) { |
| 44 | if max.Load() >= 2 { |
| 45 | break |
| 46 | } |
| 47 | time.Sleep(5 * time.Millisecond) |
| 48 | } |
| 49 | if got := max.Load(); got > 2 { |
| 50 | t.Fatalf("max concurrent = %d, want <= 2", got) |
| 51 | } |
| 52 | close(barrier) |
| 53 | wg.Wait() |
| 54 | _ = root |
| 55 | } |
| 56 | |
| 57 | func TestSchedulerNestedFailsFast(t *testing.T) { |
| 58 | s := NewSubagentScheduler(1, 1) |
| 59 | release, err := s.Acquire(context.Background(), AcquireRequest{Writer: false}) |
| 60 | if err != nil { |
| 61 | t.Fatal(err) |
| 62 | } |
| 63 | defer release() |
| 64 | _, err = s.Acquire(context.Background(), AcquireRequest{Writer: false, Nested: true}) |
| 65 | if err == nil { |
| 66 | t.Fatal("nested acquire should fail fast at limit") |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | func TestSchedulerWriterPathConflictQueues(t *testing.T) { |
| 71 | s := NewSubagentScheduler(4, 2) |
| 72 | root := t.TempDir() |
| 73 | claim, err := NormalizeWritePaths(root, []string{"a.md"}) |
| 74 | if err != nil { |
| 75 | t.Fatal(err) |
| 76 | } |
| 77 | release, err := s.Acquire(context.Background(), AcquireRequest{Writer: true, WritePaths: claim}) |
| 78 | if err != nil { |
| 79 | t.Fatal(err) |
| 80 | } |
| 81 | |
| 82 | ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond) |
| 83 | defer cancel() |
| 84 | // Same path cannot start while the first claim is held — with Nested it fails. |
| 85 | _, err = s.Acquire(ctx, AcquireRequest{Writer: true, WritePaths: claim, Nested: true}) |
| 86 | if err == nil { |
| 87 | t.Fatal("expected path conflict for nested acquire") |
| 88 | } |
| 89 | release() |
| 90 | |
| 91 | // After release, same path is free. |
| 92 | release2, err := s.Acquire(context.Background(), AcquireRequest{Writer: true, WritePaths: claim}) |
| 93 | if err != nil { |
| 94 | t.Fatal(err) |
| 95 | } |
| 96 | release2() |
| 97 | } |
| 98 | |
| 99 | func TestSchedulerTryClaimWritePaths(t *testing.T) { |
| 100 | s := NewSubagentScheduler(4, 2) |
| 101 | root := t.TempDir() |
| 102 | claim, _ := NormalizeWritePaths(root, []string{"a.md"}) |
| 103 | release, err := s.Acquire(context.Background(), AcquireRequest{Writer: true, WritePaths: claim}) |
| 104 | if err != nil { |
| 105 | t.Fatal(err) |
| 106 | } |
| 107 | defer release() |
| 108 | if err := s.TryClaimWritePaths(claim); err == nil { |
| 109 | t.Fatal("parent should see active claim") |
| 110 | } |
| 111 | other, _ := NormalizeWritePaths(root, []string{"b.md"}) |
| 112 | if err := s.TryClaimWritePaths(other); err != nil { |
| 113 | t.Fatalf("disjoint claim should be free: %v", err) |
| 114 | } |
| 115 | } |
| 116 |