TEST_F(RouterTest, GrpcOutlierDetectionUnavailableStatusCode) {
  NiceMock<Http::MockRequestEncoder> encoder1;
  Http::ResponseDecoder* response_decoder = nullptr;
  EXPECT_CALL(cm_.thread_local_cluster_.conn_pool_, newStream(_, _))
      .WillOnce(Invoke(
          [&](Http::ResponseDecoder& decoder,
              Http::ConnectionPool::Callbacks& callbacks) -> Http::ConnectionPool::Cancellable* {
            response_decoder = &decoder;
            callbacks.onPoolReady(encoder1, cm_.thread_local_cluster_.conn_pool_.host_,
                                  upstream_stream_info_, Http::Protocol::Http10);
            return nullptr;
          }));
  expectResponseTimerCreate();

  Http::TestRequestHeaderMapImpl headers{{"content-type", "application/grpc"},
                                         {"grpc-timeout", "20S"}};
  HttpTestUtility::addDefaultHeaders(headers);
  router_.decodeHeaders(headers, true);
  EXPECT_EQ(1U,
            callbacks_.route_->route_entry_.virtual_cluster_.stats().upstream_rq_total_.value());

  Http::ResponseHeaderMapPtr response_headers(
      new Http::TestResponseHeaderMapImpl{{":status", "200"}, {"grpc-status", "14"}});
  // Outlier detector will use the gRPC response status code.
  EXPECT_CALL(cm_.thread_local_cluster_.conn_pool_.host_->outlier_detector_,
              putHttpResponseCode(503));
  response_decoder->decodeHeaders(std::move(response_headers), true);
  EXPECT_TRUE(verifyHostUpstreamStats(0, 1));
}
TEST_F(RouterTest, GrpcOutlierDetectionUnavailableStatusCode) {
  NiceMock<Http::MockRequestEncoder> encoder1;
  Http::ResponseDecoder* response_decoder = nullptr;
  EXPECT_CALL(cm_.thread_local_cluster_.conn_pool_, newStream(_, _))
      .WillOnce(Invoke(
          [&](Http::ResponseDecoder& decoder,
              Http::ConnectionPool::Callbacks& callbacks) -> Http::ConnectionPool::Cancellable* {
            response_decoder = &decoder;
            callbacks.onPoolReady(encoder1, cm_.thread_local_cluster_.conn_pool_.host_,
                                  upstream_stream_info_, Http::Protocol::Http10);
            return nullptr;
          }));
  expectResponseTimerCreate();

  Http::TestRequestHeaderMapImpl headers{{"content-type", "application/grpc"},
                                         {"grpc-timeout", "20S"}};
  HttpTestUtility::addDefaultHeaders(headers);
  router_.decodeHeaders(headers, true);
  EXPECT_EQ(1U,
            callbacks_.route_->route_entry_.virtual_cluster_.stats().upstream_rq_total_.value());

  Http::ResponseHeaderMapPtr response_headers(
      new Http::TestResponseHeaderMapImpl{{":status", "200"}, {"grpc-status", "14"}});
   
  EXPECT_CALL(cm_.thread_local_cluster_.conn_pool_.host_->outlier_detector_,
              putHttpResponseCode(503));
  response_decoder->decodeHeaders(std::move(response_headers), true);
  EXPECT_TRUE(verifyHostUpstreamStats(0, 1));
}