TEST_F(RouterTest, RetryRequestDuringBodyCompleteBetweenAttempts) {
  Buffer::OwnedImpl decoding_buffer;
  EXPECT_CALL(callbacks_, decodingBuffer()).WillRepeatedly(Return(&decoding_buffer));
  EXPECT_CALL(callbacks_, addDecodedData(_, true))
      .WillRepeatedly(Invoke([&](Buffer::Instance& data, bool) { decoding_buffer.move(data); }));

  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;
          }));

  Http::TestRequestHeaderMapImpl headers{
      {"x-envoy-retry-on", "5xx"}, {"x-envoy-internal", "true"}, {"myheader", "present"}};
  HttpTestUtility::addDefaultHeaders(headers);
  router_.decodeHeaders(headers, false);
  const std::string body1("body1");
  Buffer::OwnedImpl buf1(body1);
  EXPECT_CALL(*router_.retry_state_, enabled()).Times(2).WillRepeatedly(Return(true));
  router_.decodeData(buf1, false);

  router_.retry_state_->expectResetRetry();
  encoder1.stream_.resetStream(Http::StreamResetReason::RemoteReset);

  // Complete request while there is no upstream request.
  const std::string body2("body2");
  Buffer::OwnedImpl buf2(body2);
  router_.decodeData(buf2, true);

  NiceMock<Http::MockRequestEncoder> encoder2;
  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(encoder2, cm_.thread_local_cluster_.conn_pool_.host_,
                                  upstream_stream_info_, Http::Protocol::Http10);
            return nullptr;
          }));

  EXPECT_CALL(encoder2, encodeHeaders(HeaderHasValueRef("myheader", "present"), false));
  EXPECT_CALL(encoder2, encodeData(BufferStringEqual(body1 + body2), true));
  router_.retry_state_->callback_();
  EXPECT_EQ(2U,
            callbacks_.route_->route_entry_.virtual_cluster_.stats().upstream_rq_total_.value());
  EXPECT_TRUE(verifyHostUpstreamStats(0, 1));

  // Send successful response, verify success.
  Http::ResponseHeaderMapPtr response_headers(
      new Http::TestResponseHeaderMapImpl({{":status", "200"}}));
  EXPECT_CALL(callbacks_, encodeHeaders_(_, _))
      .WillOnce(Invoke([&](Http::ResponseHeaderMap& headers, bool) -> void {
        EXPECT_EQ(headers.Status()->value(), "200");
      }));
  response_decoder->decodeHeaders(std::move(response_headers), true);
  EXPECT_TRUE(verifyHostUpstreamStats(1, 1));
}
TEST_F(RouterTest, RetryRequestDuringBodyCompleteBetweenAttempts) {
  Buffer::OwnedImpl decoding_buffer;
  EXPECT_CALL(callbacks_, decodingBuffer()).WillRepeatedly(Return(&decoding_buffer));
  EXPECT_CALL(callbacks_, addDecodedData(_, true))
      .WillRepeatedly(Invoke([&](Buffer::Instance& data, bool) { decoding_buffer.move(data); }));

  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;
          }));

  Http::TestRequestHeaderMapImpl headers{
      {"x-envoy-retry-on", "5xx"}, {"x-envoy-internal", "true"}, {"myheader", "present"}};
  HttpTestUtility::addDefaultHeaders(headers);
  router_.decodeHeaders(headers, false);
  const std::string body1("body1");
  Buffer::OwnedImpl buf1(body1);
  EXPECT_CALL(*router_.retry_state_, enabled()).Times(2).WillRepeatedly(Return(true));
  router_.decodeData(buf1, false);

  router_.retry_state_->expectResetRetry();
  encoder1.stream_.resetStream(Http::StreamResetReason::RemoteReset);

   
  const std::string body2("body2");
  Buffer::OwnedImpl buf2(body2);
  router_.decodeData(buf2, true);

  NiceMock<Http::MockRequestEncoder> encoder2;
  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(encoder2, cm_.thread_local_cluster_.conn_pool_.host_,
                                  upstream_stream_info_, Http::Protocol::Http10);
            return nullptr;
          }));

  EXPECT_CALL(encoder2, encodeHeaders(HeaderHasValueRef("myheader", "present"), false));
  EXPECT_CALL(encoder2, encodeData(BufferStringEqual(body1 + body2), true));
  router_.retry_state_->callback_();
  EXPECT_EQ(2U,
            callbacks_.route_->route_entry_.virtual_cluster_.stats().upstream_rq_total_.value());
  EXPECT_TRUE(verifyHostUpstreamStats(0, 1));

   
  Http::ResponseHeaderMapPtr response_headers(
      new Http::TestResponseHeaderMapImpl({{":status", "200"}}));
  EXPECT_CALL(callbacks_, encodeHeaders_(_, _))
      .WillOnce(Invoke([&](Http::ResponseHeaderMap& headers, bool) -> void {
        EXPECT_EQ(headers.Status()->value(), "200");
      }));
  response_decoder->decodeHeaders(std::move(response_headers), true);
  EXPECT_TRUE(verifyHostUpstreamStats(1, 1));
}