func MaxUnavailable(deployment apps.Deployment) int32 {
	if !IsRollingUpdate(&deployment) || *(deployment.Spec.Replicas) == 0 {
		return int32(0)
	}
	// Error caught by validation
	_, maxUnavailable, _ := ResolveFenceposts(deployment.Spec.Strategy.RollingUpdate.MaxSurge, deployment.Spec.Strategy.RollingUpdate.MaxUnavailable, *(deployment.Spec.Replicas))
	if maxUnavailable > *deployment.Spec.Replicas {
		return *deployment.Spec.Replicas
	}

				maxSurge = ptr.To(intstr.FromString(*test.maxSurge))
			}
			if test.maxUnavailable != nil {
				maxUnavail = ptr.To(intstr.FromString(*test.maxUnavailable))
			}
			surge, unavail, err := ResolveFenceposts(maxSurge, maxUnavail, test.desired)
			if err != nil && !test.expectError {
				t.Errorf("unexpected error %v", err)
			}
			if err == nil && test.expectError {
				t.Error("expected error")
			}