vhost

overlay/virtqueue/eventfd_test.go

@@ -0,0 +1,45 @@
+package virtqueue
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gvisor.dev/gvisor/pkg/eventfd"
+)
+
+// Tests how an eventfd and a waiting goroutine can be gracefully closed.
+// Extends the eventfd test suite:
+// https://github.com/google/gvisor/blob/0799336d64be65eb97d330606c30162dc3440cab/pkg/eventfd/eventfd_test.go
+func TestEventFD_CancelWait(t *testing.T) {
+	efd, err := eventfd.Create()
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		assert.NoError(t, efd.Close())
+	})
+
+	var stop bool
+
+	done := make(chan struct{})
+	go func() {
+		for !stop {
+			_ = efd.Wait()
+		}
+		close(done)
+	}()
+	select {
+	case <-done:
+		t.Fatalf("goroutine ended early")
+	case <-time.After(500 * time.Millisecond):
+	}
+
+	stop = true
+	assert.NoError(t, efd.Notify())
+	select {
+	case <-done:
+		break
+	case <-time.After(5 * time.Second):
+		t.Error("goroutine did not end")
+	}
+}