  void expectSingleHealthcheck(HealthTransition host_changed_state) {
    cluster_->prioritySet().getMockHostSet(0)->hosts_ = {
        makeTestHost(cluster_->info_, "tcp://127.0.0.1:80", simTime())};
    expectHealthchecks(host_changed_state, 1);
  }
  void expectSingleHealthcheck(HealthTransition host_changed_state) {
    cluster_->prioritySet().getMockHostSet(0)->hosts_ = {
        makeTestHost(cluster_->info_, "tcp://127.0.0.1:80", simTime())};
    expectHealthchecks(host_changed_state, 1);
  }