test/core/end2end/tests/retry_streaming.cc - platform/external/grpc-grpc - Git at Google

 /*
  *
  * Copyright 2017 gRPC authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  */

 #include "test/core/end2end/end2end_tests.h"

 #include <stdio.h>
 #include <string.h>

 #include <grpc/byte_buffer.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>

 #include "src/core/lib/surface/channel.h"
 #include "src/core/lib/surface/server.h"

 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/gpr/useful.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/transport/static_metadata.h"

 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/end2end/tests/cancel_test_helpers.h"

 static void* tag(intptr_t t) { return (void*)t; }

 static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                             const char* test_name,
                                             grpc_channel_args* client_args,
                                             grpc_channel_args* server_args) {
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
   config.init_server(&f, server_args);
   config.init_client(&f, client_args);
   return f;
 }

 static gpr_timespec n_seconds_from_now(int n) {
   return grpc_timeout_seconds_to_deadline(n);
 }

 static gpr_timespec five_seconds_from_now(void) {
   return n_seconds_from_now(5);
 }

 static void drain_cq(grpc_completion_queue* cq) {
   grpc_event ev;
   do {
     ev = grpc_completion_queue_next(cq, five_seconds_from_now(), nullptr);
   } while (ev.type != GRPC_QUEUE_SHUTDOWN);
 }

 static void shutdown_server(grpc_end2end_test_fixture* f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->shutdown_cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(1000),
                                          grpc_timeout_seconds_to_deadline(5),
                                          nullptr)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = nullptr;
 }

 static void shutdown_client(grpc_end2end_test_fixture* f) {
   if (!f->client) return;
   grpc_channel_destroy(f->client);
   f->client = nullptr;
 }

 static void end_test(grpc_end2end_test_fixture* f) {
   shutdown_server(f);
   shutdown_client(f);

   grpc_completion_queue_shutdown(f->cq);
   drain_cq(f->cq);
   grpc_completion_queue_destroy(f->cq);
   grpc_completion_queue_destroy(f->shutdown_cq);
 }

 // Tests retrying a streaming RPC.  This is the same as
 // the basic retry test, except that the client sends two messages on the
 // call before the initial attempt fails.
 // FIXME: We should also test the case where the retry is committed after
 // replaying 1 of 2 previously-completed send_message ops.  However,
 // there's no way to trigger that from an end2end test, because the
 // replayed ops happen under the hood -- they are not surfaced to the
 // C-core API, and therefore we have no way to inject the commit at the
 // right point.
 static void test_retry_streaming(grpc_end2end_test_config config) {
   grpc_call* c;
   grpc_call* s;
   grpc_op ops[6];
   grpc_op* op;
   grpc_metadata_array initial_metadata_recv;
   grpc_metadata_array trailing_metadata_recv;
   grpc_metadata_array request_metadata_recv;
   grpc_call_details call_details;
   grpc_slice request_payload_slice = grpc_slice_from_static_string("foo");
   grpc_slice request2_payload_slice = grpc_slice_from_static_string("bar");
   grpc_slice request3_payload_slice = grpc_slice_from_static_string("baz");
   grpc_slice response_payload_slice = grpc_slice_from_static_string("quux");
   grpc_byte_buffer* request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
   grpc_byte_buffer* request2_payload =
       grpc_raw_byte_buffer_create(&request2_payload_slice, 1);
   grpc_byte_buffer* request3_payload =
       grpc_raw_byte_buffer_create(&request3_payload_slice, 1);
   grpc_byte_buffer* response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   grpc_byte_buffer* request_payload_recv = nullptr;
   grpc_byte_buffer* request2_payload_recv = nullptr;
   grpc_byte_buffer* request3_payload_recv = nullptr;
   grpc_byte_buffer* response_payload_recv = nullptr;
   grpc_status_code status;
   grpc_call_error error;
   grpc_slice details;
   int was_cancelled = 2;
   char* peer;

   grpc_arg args[] = {
       grpc_channel_arg_integer_create(
           const_cast<char*>(GRPC_ARG_MAX_CHANNEL_TRACE_EVENT_MEMORY_PER_NODE),
           1024 * 8),
       grpc_channel_arg_integer_create(
           const_cast<char*>(GRPC_ARG_ENABLE_CHANNELZ), true),
       grpc_channel_arg_string_create(
           const_cast<char*>(GRPC_ARG_SERVICE_CONFIG),
           const_cast<char*>(
               "{\n"
               "  \"methodConfig\": [ {\n"
               "    \"name\": [\n"
               "      { \"service\": \"service\", \"method\": \"method\" }\n"
               "    ],\n"
               "    \"retryPolicy\": {\n"
               "      \"maxAttempts\": 3,\n"
               "      \"initialBackoff\": \"1s\",\n"
               "      \"maxBackoff\": \"120s\",\n"
               "      \"backoffMultiplier\": 1.6,\n"
               "      \"retryableStatusCodes\": [ \"ABORTED\" ]\n"
               "    }\n"
               "  } ]\n"
               "}"))};
   grpc_channel_args client_args = {GPR_ARRAY_SIZE(args), args};
   grpc_end2end_test_fixture f =
       begin_test(config, "retry_streaming", &client_args, nullptr);

   cq_verifier* cqv = cq_verifier_create(f.cq);

   gpr_timespec deadline = five_seconds_from_now();
   c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                grpc_slice_from_static_string("/service/method"),
                                nullptr, deadline, nullptr);
   grpc_core::channelz::ChannelNode* channelz_channel =
       grpc_channel_get_channelz_node(f.client);

   GPR_ASSERT(c);

   peer = grpc_call_get_peer(c);
   GPR_ASSERT(peer != nullptr);
   gpr_log(GPR_DEBUG, "client_peer_before_call=%s", peer);
   gpr_free(peer);

   grpc_metadata_array_init(&initial_metadata_recv);
   grpc_metadata_array_init(&trailing_metadata_recv);
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_init(&call_details);
   grpc_slice status_details = grpc_slice_from_static_string("xyz");

   // Client starts a batch for receiving initial metadata, a message,
   // and trailing metadata.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
   op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &response_payload_recv;
   op++;
   op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
   op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);

   // Client sends initial metadata and a message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = request_payload;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(2), true);
   cq_verify(cqv);

   // Server gets a call with received initial metadata.
   error =
       grpc_server_request_call(f.server, &s, &call_details,
                                &request_metadata_recv, f.cq, f.cq, tag(101));
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(101), true);
   cq_verify(cqv);

   peer = grpc_call_get_peer(s);
   GPR_ASSERT(peer != nullptr);
   gpr_log(GPR_DEBUG, "server_peer=%s", peer);
   gpr_free(peer);
   peer = grpc_call_get_peer(c);
   GPR_ASSERT(peer != nullptr);
   gpr_log(GPR_DEBUG, "client_peer=%s", peer);
   gpr_free(peer);

   // Server receives a message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(102), true);
   cq_verify(cqv);

   // Client sends a second message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = request2_payload;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(3), true);
   cq_verify(cqv);

   // Server receives the second message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request2_payload_recv;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(103), true);
   cq_verify(cqv);

   // Server sends both initial and trailing metadata.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
   op++;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   op->data.send_status_from_server.status = GRPC_STATUS_ABORTED;
   op->data.send_status_from_server.status_details = &status_details;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(104), true);
   cq_verify(cqv);

   // Clean up from first attempt.
   grpc_call_unref(s);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_metadata_array_init(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
   grpc_call_details_init(&call_details);
   GPR_ASSERT(byte_buffer_eq_slice(request_payload_recv, request_payload_slice));
   grpc_byte_buffer_destroy(request_payload_recv);
   request_payload_recv = nullptr;
   GPR_ASSERT(
       byte_buffer_eq_slice(request2_payload_recv, request2_payload_slice));
   grpc_byte_buffer_destroy(request2_payload_recv);
   request2_payload_recv = nullptr;

   // Server gets a second call (the retry).
   error =
       grpc_server_request_call(f.server, &s, &call_details,
                                &request_metadata_recv, f.cq, f.cq, tag(201));
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(201), true);
   cq_verify(cqv);

   peer = grpc_call_get_peer(s);
   GPR_ASSERT(peer != nullptr);
   gpr_log(GPR_DEBUG, "server_peer=%s", peer);
   gpr_free(peer);
   peer = grpc_call_get_peer(c);
   GPR_ASSERT(peer != nullptr);
   gpr_log(GPR_DEBUG, "client_peer=%s", peer);
   gpr_free(peer);

   // Server receives a message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(202),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(202), true);
   cq_verify(cqv);

   // Server receives a second message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request2_payload_recv;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(203),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(203), true);
   cq_verify(cqv);

   // Client sends a third message and a close.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = request3_payload;
   op++;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op++;
   error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(4), true);
   cq_verify(cqv);

   // Server receives a third message.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request3_payload_recv;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(204),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(204), true);
   cq_verify(cqv);

   // Server receives a close and sends initial metadata, a message, and
   // trailing metadata.
   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   op->data.recv_close_on_server.cancelled = &was_cancelled;
   op++;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = response_payload;
   op++;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count = 0;
   // Returning a retriable code, but because we are also sending a
   // message, the client will commit instead of retrying again.
   op->data.send_status_from_server.status = GRPC_STATUS_ABORTED;
   op->data.send_status_from_server.status_details = &status_details;
   op++;
   error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(205),
                                 nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(205), true);
   CQ_EXPECT_COMPLETION(cqv, tag(1), true);
   cq_verify(cqv);

   GPR_ASSERT(status == GRPC_STATUS_ABORTED);
   GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
   GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/service/method"));
   GPR_ASSERT(0 == call_details.flags);
   GPR_ASSERT(was_cancelled == 0);

   GPR_ASSERT(channelz_channel != nullptr);
   std::string json = channelz_channel->RenderJsonString();
   gpr_log(GPR_INFO, "%s", json.c_str());
   GPR_ASSERT(json.find("\"trace\"") != json.npos);
   GPR_ASSERT(json.find("\"description\":\"Channel created\"") != json.npos);
   GPR_ASSERT(json.find("\"severity\":\"CT_INFO\"") != json.npos);
   GPR_ASSERT(json.find("Resolution event") != json.npos);
   GPR_ASSERT(json.find("Created new LB policy") != json.npos);
   GPR_ASSERT(json.find("Service config changed") != json.npos);
   GPR_ASSERT(json.find("Address list became non-empty") != json.npos);
   GPR_ASSERT(json.find("Channel state change to CONNECTING") != json.npos);

   grpc_slice_unref(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);
   grpc_metadata_array_destroy(&request_metadata_recv);
   grpc_call_details_destroy(&call_details);
   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(request2_payload);
   grpc_byte_buffer_destroy(request3_payload);
   grpc_byte_buffer_destroy(response_payload);
   GPR_ASSERT(byte_buffer_eq_slice(request_payload_recv, request_payload_slice));
   grpc_byte_buffer_destroy(request_payload_recv);
   GPR_ASSERT(
       byte_buffer_eq_slice(request2_payload_recv, request2_payload_slice));
   grpc_byte_buffer_destroy(request2_payload_recv);
   GPR_ASSERT(
       byte_buffer_eq_slice(request3_payload_recv, request3_payload_slice));
   grpc_byte_buffer_destroy(request3_payload_recv);
   grpc_byte_buffer_destroy(response_payload_recv);

   grpc_call_unref(c);
   grpc_call_unref(s);

   cq_verifier_destroy(cqv);

   end_test(&f);
   config.tear_down_data(&f);
 }

 void retry_streaming(grpc_end2end_test_config config) {
   GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL);

   test_retry_streaming(config);
 }

 void retry_streaming_pre_init(void) {}
	/*
	*
	* Copyright 2017 gRPC authors.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/

	#include "test/core/end2end/end2end_tests.h"

	#include <stdio.h>
	#include <string.h>

	#include <grpc/byte_buffer.h>
	#include <grpc/grpc.h>
	#include <grpc/support/alloc.h>
	#include <grpc/support/log.h>
	#include <grpc/support/string_util.h>
	#include <grpc/support/time.h>

	#include "src/core/lib/surface/channel.h"
	#include "src/core/lib/surface/server.h"

	#include "src/core/lib/channel/channel_args.h"
	#include "src/core/lib/gpr/string.h"
	#include "src/core/lib/gpr/useful.h"
	#include "src/core/lib/iomgr/exec_ctx.h"
	#include "src/core/lib/transport/static_metadata.h"

	#include "test/core/end2end/cq_verifier.h"
	#include "test/core/end2end/tests/cancel_test_helpers.h"

	static void* tag(intptr_t t) { return (void*)t; }

	static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
	const char* test_name,
	grpc_channel_args* client_args,
	grpc_channel_args* server_args) {
	grpc_end2end_test_fixture f;
	gpr_log(GPR_INFO, "Running test: %s/%s", test_name, config.name);
	f = config.create_fixture(client_args, server_args);
	config.init_server(&f, server_args);
	config.init_client(&f, client_args);
	return f;
	}

	static gpr_timespec n_seconds_from_now(int n) {
	return grpc_timeout_seconds_to_deadline(n);
	}

	static gpr_timespec five_seconds_from_now(void) {
	return n_seconds_from_now(5);
	}

	static void drain_cq(grpc_completion_queue* cq) {
	grpc_event ev;
	do {
	ev = grpc_completion_queue_next(cq, five_seconds_from_now(), nullptr);
	} while (ev.type != GRPC_QUEUE_SHUTDOWN);
	}

	static void shutdown_server(grpc_end2end_test_fixture* f) {
	if (!f->server) return;
	grpc_server_shutdown_and_notify(f->server, f->shutdown_cq, tag(1000));
	GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(1000),
	grpc_timeout_seconds_to_deadline(5),
	nullptr)
	.type == GRPC_OP_COMPLETE);
	grpc_server_destroy(f->server);
	f->server = nullptr;
	}

	static void shutdown_client(grpc_end2end_test_fixture* f) {
	if (!f->client) return;
	grpc_channel_destroy(f->client);
	f->client = nullptr;
	}

	static void end_test(grpc_end2end_test_fixture* f) {
	shutdown_server(f);
	shutdown_client(f);

	grpc_completion_queue_shutdown(f->cq);
	drain_cq(f->cq);
	grpc_completion_queue_destroy(f->cq);
	grpc_completion_queue_destroy(f->shutdown_cq);
	}

	// Tests retrying a streaming RPC. This is the same as
	// the basic retry test, except that the client sends two messages on the
	// call before the initial attempt fails.
	// FIXME: We should also test the case where the retry is committed after
	// replaying 1 of 2 previously-completed send_message ops. However,
	// there's no way to trigger that from an end2end test, because the
	// replayed ops happen under the hood -- they are not surfaced to the
	// C-core API, and therefore we have no way to inject the commit at the
	// right point.
	static void test_retry_streaming(grpc_end2end_test_config config) {
	grpc_call* c;
	grpc_call* s;
	grpc_op ops[6];
	grpc_op* op;
	grpc_metadata_array initial_metadata_recv;
	grpc_metadata_array trailing_metadata_recv;
	grpc_metadata_array request_metadata_recv;
	grpc_call_details call_details;
	grpc_slice request_payload_slice = grpc_slice_from_static_string("foo");
	grpc_slice request2_payload_slice = grpc_slice_from_static_string("bar");
	grpc_slice request3_payload_slice = grpc_slice_from_static_string("baz");
	grpc_slice response_payload_slice = grpc_slice_from_static_string("quux");
	grpc_byte_buffer* request_payload =
	grpc_raw_byte_buffer_create(&request_payload_slice, 1);
	grpc_byte_buffer* request2_payload =
	grpc_raw_byte_buffer_create(&request2_payload_slice, 1);
	grpc_byte_buffer* request3_payload =
	grpc_raw_byte_buffer_create(&request3_payload_slice, 1);
	grpc_byte_buffer* response_payload =
	grpc_raw_byte_buffer_create(&response_payload_slice, 1);
	grpc_byte_buffer* request_payload_recv = nullptr;
	grpc_byte_buffer* request2_payload_recv = nullptr;
	grpc_byte_buffer* request3_payload_recv = nullptr;
	grpc_byte_buffer* response_payload_recv = nullptr;
	grpc_status_code status;
	grpc_call_error error;
	grpc_slice details;
	int was_cancelled = 2;
	char* peer;

	grpc_arg args[] = {
	grpc_channel_arg_integer_create(
	const_cast<char*>(GRPC_ARG_MAX_CHANNEL_TRACE_EVENT_MEMORY_PER_NODE),
	1024 * 8),
	grpc_channel_arg_integer_create(
	const_cast<char*>(GRPC_ARG_ENABLE_CHANNELZ), true),
	grpc_channel_arg_string_create(
	const_cast<char*>(GRPC_ARG_SERVICE_CONFIG),
	const_cast<char*>(
	"{\n"
	" \"methodConfig\": [ {\n"
	" \"name\": [\n"
	" { \"service\": \"service\", \"method\": \"method\" }\n"
	" ],\n"
	" \"retryPolicy\": {\n"
	" \"maxAttempts\": 3,\n"
	" \"initialBackoff\": \"1s\",\n"
	" \"maxBackoff\": \"120s\",\n"
	" \"backoffMultiplier\": 1.6,\n"
	" \"retryableStatusCodes\": [ \"ABORTED\" ]\n"
	" }\n"
	" } ]\n"
	"}"))};
	grpc_channel_args client_args = {GPR_ARRAY_SIZE(args), args};
	grpc_end2end_test_fixture f =
	begin_test(config, "retry_streaming", &client_args, nullptr);

	cq_verifier* cqv = cq_verifier_create(f.cq);

	gpr_timespec deadline = five_seconds_from_now();
	c = grpc_channel_create_call(f.client, nullptr, GRPC_PROPAGATE_DEFAULTS, f.cq,
	grpc_slice_from_static_string("/service/method"),
	nullptr, deadline, nullptr);
	grpc_core::channelz::ChannelNode* channelz_channel =
	grpc_channel_get_channelz_node(f.client);

	GPR_ASSERT(c);

	peer = grpc_call_get_peer(c);
	GPR_ASSERT(peer != nullptr);
	gpr_log(GPR_DEBUG, "client_peer_before_call=%s", peer);
	gpr_free(peer);

	grpc_metadata_array_init(&initial_metadata_recv);
	grpc_metadata_array_init(&trailing_metadata_recv);
	grpc_metadata_array_init(&request_metadata_recv);
	grpc_call_details_init(&call_details);
	grpc_slice status_details = grpc_slice_from_static_string("xyz");

	// Client starts a batch for receiving initial metadata, a message,
	// and trailing metadata.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_INITIAL_METADATA;
	op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
	op++;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &response_payload_recv;
	op++;
	op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
	op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
	op->data.recv_status_on_client.status = &status;
	op->data.recv_status_on_client.status_details = &details;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);

	// Client sends initial metadata and a message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op++;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message.send_message = request_payload;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(2), true);
	cq_verify(cqv);

	// Server gets a call with received initial metadata.
	error =
	grpc_server_request_call(f.server, &s, &call_details,
	&request_metadata_recv, f.cq, f.cq, tag(101));
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(101), true);
	cq_verify(cqv);

	peer = grpc_call_get_peer(s);
	GPR_ASSERT(peer != nullptr);
	gpr_log(GPR_DEBUG, "server_peer=%s", peer);
	gpr_free(peer);
	peer = grpc_call_get_peer(c);
	GPR_ASSERT(peer != nullptr);
	gpr_log(GPR_DEBUG, "client_peer=%s", peer);
	gpr_free(peer);

	// Server receives a message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &request_payload_recv;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(102), true);
	cq_verify(cqv);

	// Client sends a second message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message.send_message = request2_payload;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(3), true);
	cq_verify(cqv);

	// Server receives the second message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &request2_payload_recv;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(103), true);
	cq_verify(cqv);

	// Server sends both initial and trailing metadata.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
	op->data.recv_close_on_server.cancelled = &was_cancelled;
	op++;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op++;
	op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
	op->data.send_status_from_server.trailing_metadata_count = 0;
	op->data.send_status_from_server.status = GRPC_STATUS_ABORTED;
	op->data.send_status_from_server.status_details = &status_details;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(104), true);
	cq_verify(cqv);

	// Clean up from first attempt.
	grpc_call_unref(s);
	grpc_metadata_array_destroy(&request_metadata_recv);
	grpc_metadata_array_init(&request_metadata_recv);
	grpc_call_details_destroy(&call_details);
	grpc_call_details_init(&call_details);
	GPR_ASSERT(byte_buffer_eq_slice(request_payload_recv, request_payload_slice));
	grpc_byte_buffer_destroy(request_payload_recv);
	request_payload_recv = nullptr;
	GPR_ASSERT(
	byte_buffer_eq_slice(request2_payload_recv, request2_payload_slice));
	grpc_byte_buffer_destroy(request2_payload_recv);
	request2_payload_recv = nullptr;

	// Server gets a second call (the retry).
	error =
	grpc_server_request_call(f.server, &s, &call_details,
	&request_metadata_recv, f.cq, f.cq, tag(201));
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(201), true);
	cq_verify(cqv);

	peer = grpc_call_get_peer(s);
	GPR_ASSERT(peer != nullptr);
	gpr_log(GPR_DEBUG, "server_peer=%s", peer);
	gpr_free(peer);
	peer = grpc_call_get_peer(c);
	GPR_ASSERT(peer != nullptr);
	gpr_log(GPR_DEBUG, "client_peer=%s", peer);
	gpr_free(peer);

	// Server receives a message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &request_payload_recv;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(202),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(202), true);
	cq_verify(cqv);

	// Server receives a second message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &request2_payload_recv;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(203),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(203), true);
	cq_verify(cqv);

	// Client sends a third message and a close.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message.send_message = request3_payload;
	op++;
	op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
	op++;
	error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(4), true);
	cq_verify(cqv);

	// Server receives a third message.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message.recv_message = &request3_payload_recv;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(204),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(204), true);
	cq_verify(cqv);

	// Server receives a close and sends initial metadata, a message, and
	// trailing metadata.
	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
	op->data.recv_close_on_server.cancelled = &was_cancelled;
	op++;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op++;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message.send_message = response_payload;
	op++;
	op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
	op->data.send_status_from_server.trailing_metadata_count = 0;
	// Returning a retriable code, but because we are also sending a
	// message, the client will commit instead of retrying again.
	op->data.send_status_from_server.status = GRPC_STATUS_ABORTED;
	op->data.send_status_from_server.status_details = &status_details;
	op++;
	error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(205),
	nullptr);
	GPR_ASSERT(GRPC_CALL_OK == error);
	CQ_EXPECT_COMPLETION(cqv, tag(205), true);
	CQ_EXPECT_COMPLETION(cqv, tag(1), true);
	cq_verify(cqv);

	GPR_ASSERT(status == GRPC_STATUS_ABORTED);
	GPR_ASSERT(0 == grpc_slice_str_cmp(details, "xyz"));
	GPR_ASSERT(0 == grpc_slice_str_cmp(call_details.method, "/service/method"));
	GPR_ASSERT(0 == call_details.flags);
	GPR_ASSERT(was_cancelled == 0);

	GPR_ASSERT(channelz_channel != nullptr);
	std::string json = channelz_channel->RenderJsonString();
	gpr_log(GPR_INFO, "%s", json.c_str());
	GPR_ASSERT(json.find("\"trace\"") != json.npos);
	GPR_ASSERT(json.find("\"description\":\"Channel created\"") != json.npos);
	GPR_ASSERT(json.find("\"severity\":\"CT_INFO\"") != json.npos);
	GPR_ASSERT(json.find("Resolution event") != json.npos);
	GPR_ASSERT(json.find("Created new LB policy") != json.npos);
	GPR_ASSERT(json.find("Service config changed") != json.npos);
	GPR_ASSERT(json.find("Address list became non-empty") != json.npos);
	GPR_ASSERT(json.find("Channel state change to CONNECTING") != json.npos);

	grpc_slice_unref(details);
	grpc_metadata_array_destroy(&initial_metadata_recv);
	grpc_metadata_array_destroy(&trailing_metadata_recv);
	grpc_metadata_array_destroy(&request_metadata_recv);
	grpc_call_details_destroy(&call_details);
	grpc_byte_buffer_destroy(request_payload);
	grpc_byte_buffer_destroy(request2_payload);
	grpc_byte_buffer_destroy(request3_payload);
	grpc_byte_buffer_destroy(response_payload);
	GPR_ASSERT(byte_buffer_eq_slice(request_payload_recv, request_payload_slice));
	grpc_byte_buffer_destroy(request_payload_recv);
	GPR_ASSERT(
	byte_buffer_eq_slice(request2_payload_recv, request2_payload_slice));
	grpc_byte_buffer_destroy(request2_payload_recv);
	GPR_ASSERT(
	byte_buffer_eq_slice(request3_payload_recv, request3_payload_slice));
	grpc_byte_buffer_destroy(request3_payload_recv);
	grpc_byte_buffer_destroy(response_payload_recv);

	grpc_call_unref(c);
	grpc_call_unref(s);

	cq_verifier_destroy(cqv);

	end_test(&f);
	config.tear_down_data(&f);
	}

	void retry_streaming(grpc_end2end_test_config config) {
	GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_CLIENT_CHANNEL);

	test_retry_streaming(config);
	}

	void retry_streaming_pre_init(void) {}