| 1 | package proc |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "testing" |
| 7 | "time" |
| 8 | ) |
| 9 | |
| 10 | func TestWaitForTrackedCommandReturnsWhenWaitStallsAfterCancel(t *testing.T) { |
| 11 | ctx, cancel := context.WithCancel(context.Background()) |
| 12 | cancel() |
| 13 | tracked := &TrackedCommand{} |
| 14 | releaseWait := make(chan struct{}) |
| 15 | defer close(releaseWait) |
| 16 | |
| 17 | start := time.Now() |
| 18 | err := waitForTrackedCommand(ctx, tracked, func() error { |
| 19 | <-releaseWait |
| 20 | return nil |
| 21 | }, 20*time.Millisecond, time.Millisecond, time.Millisecond) |
| 22 | elapsed := time.Since(start) |
| 23 | |
| 24 | if !errors.Is(err, context.Canceled) { |
| 25 | t.Fatalf("error = %v, want context.Canceled", err) |
| 26 | } |
| 27 | if elapsed > time.Second { |
| 28 | t.Fatalf("cancelled stalled wait returned too slowly: %v", elapsed) |
| 29 | } |
| 30 | if tracked.Diagnostics().KillCalls == 0 { |
| 31 | t.Fatal("tracked command was not killed") |
| 32 | } |
| 33 | if !tracked.Diagnostics().CancelWaitGraceExpired { |
| 34 | t.Fatal("cancelled stalled wait did not record grace expiry") |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | func TestWaitForTrackedCommandKeepsWaitErrorAfterCancel(t *testing.T) { |
| 39 | ctx, cancel := context.WithCancel(context.Background()) |
| 40 | tracked := &TrackedCommand{} |
| 41 | waitStarted := make(chan struct{}) |
| 42 | releaseWait := make(chan struct{}) |
| 43 | errWait := errors.New("wait failed after cancel") |
| 44 | done := make(chan error, 1) |
| 45 | |
| 46 | go func() { |
| 47 | done <- waitForTrackedCommand(ctx, tracked, func() error { |
| 48 | close(waitStarted) |
| 49 | <-releaseWait |
| 50 | return errWait |
| 51 | }, time.Second, time.Millisecond, time.Millisecond) |
| 52 | }() |
| 53 | |
| 54 | <-waitStarted |
| 55 | cancel() |
| 56 | waitUntilTrackedCommandKilled(t, tracked) |
| 57 | close(releaseWait) |
| 58 | |
| 59 | select { |
| 60 | case err := <-done: |
| 61 | if err.Error() != context.Canceled.Error() { |
| 62 | t.Fatalf("error text = %q, want %q", err.Error(), context.Canceled.Error()) |
| 63 | } |
| 64 | if !errors.Is(err, context.Canceled) { |
| 65 | t.Fatalf("error = %v, want context.Canceled", err) |
| 66 | } |
| 67 | if !errors.Is(err, errWait) { |
| 68 | t.Fatalf("error = %v, want wrapped wait error %v", err, errWait) |
| 69 | } |
| 70 | case <-time.After(time.Second): |
| 71 | t.Fatal("timed out waiting for cancelled command wait") |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | func waitUntilTrackedCommandKilled(t *testing.T, tracked *TrackedCommand) { |
| 76 | t.Helper() |
| 77 | deadline := time.After(time.Second) |
| 78 | for { |
| 79 | if tracked.Diagnostics().KillCalls > 0 { |
| 80 | return |
| 81 | } |
| 82 | select { |
| 83 | case <-deadline: |
| 84 | t.Fatal("timed out waiting for tracked command kill") |
| 85 | default: |
| 86 | time.Sleep(time.Millisecond) |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 |