test/core/end2end/tests/load_reporting_hook.c - platform/external/grpc-grpc - Gitiles

 /*
  *
  * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */

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

 #include <string.h>

 #include <grpc/byte_buffer.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
 #include "test/core/end2end/cq_verifier.h"

 #include "src/core/ext/load_reporting/load_reporting.h"
 #include "src/core/lib/channel/channel_args.h"

 enum { TIMEOUT = 200000 };

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

 typedef struct {
   uint32_t call_creation_token;       /* expected 0xCAFED00D */
   uint32_t call_destruction_token;    /* expected 0xDEADD00D */
   uint32_t channel_creation_token;    /* expected 0xCAFEFACE */
   uint32_t channel_destruction_token; /* expected 0xDEADFACE */

   char *method_name;

   uint64_t total_bytes;
   bool fully_processed;
 } aggregated_bw_stats;

 static void sample_fn(const grpc_load_reporting_call_data *call_data,
                       void *user_data) {
   GPR_ASSERT(user_data != NULL);
   aggregated_bw_stats *custom_stats = (aggregated_bw_stats *)user_data;
   switch (call_data->source) {
     case GRPC_LR_POINT_CHANNEL_CREATION:
       custom_stats->channel_creation_token = 0xCAFEFACE;
       break;
     case GRPC_LR_POINT_CHANNEL_DESTRUCTION:
       custom_stats->channel_destruction_token = 0xDEADFACE;
       break;
     case GRPC_LR_POINT_CALL_CREATION:
       custom_stats->call_creation_token = 0xCAFED00D;
       break;
     case GRPC_LR_POINT_CALL_DESTRUCTION:
       custom_stats->method_name = gpr_strdup(call_data->method);
       custom_stats->call_destruction_token = 0xDEADD00D;
       custom_stats->total_bytes =
           call_data->final_info->stats.transport_stream_stats.outgoing
               .data_bytes +
           call_data->final_info->stats.transport_stream_stats.incoming
               .data_bytes;
       custom_stats->fully_processed = true;
       break;
     default:
       abort();
   }
 }

 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, "%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_time(int n) {
   return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
 }

 static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }

 static void drain_cq(grpc_completion_queue *cq) {
   grpc_event ev;
   do {
     ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
   } 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->cq, tag(1000));
   GPR_ASSERT(grpc_completion_queue_pluck(
                  f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
                  .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
 }

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

 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);
 }

 static void request_response_with_payload(grpc_end2end_test_fixture f,
                                           const char *method_name,
                                           const char *request_msg,
                                           const char *response_msg) {
   gpr_slice request_payload_slice = gpr_slice_from_copied_string(request_msg);
   gpr_slice response_payload_slice = gpr_slice_from_copied_string(response_msg);
   grpc_call *c;
   grpc_call *s;
   grpc_byte_buffer *request_payload =
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
   gpr_timespec deadline = five_seconds_time();
   cq_verifier *cqv = cq_verifier_create(f.cq);
   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_byte_buffer *request_payload_recv = NULL;
   grpc_byte_buffer *response_payload_recv = NULL;
   grpc_call_details call_details;
   grpc_status_code status;
   grpc_call_error error;
   char *details = NULL;
   size_t details_capacity = 0;
   int was_cancelled = 2;

   c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
                                method_name, "foo.test.google.fr", deadline,
                                NULL);
   GPR_ASSERT(c);

   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);

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message = request_payload;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_INITIAL_METADATA;
   op->data.recv_initial_metadata = &initial_metadata_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message = &response_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   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->data.recv_status_on_client.status_details_capacity = &details_capacity;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);

   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), 1);
   cq_verify(cqv);

   memset(ops, 0, sizeof(ops));
   op = ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message = &request_payload_recv;
   op->flags = 0;
   op->reserved = NULL;
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);

   cq_expect_completion(cqv, tag(102), 1);
   cq_verify(cqv);

   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->flags = 0;
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message = response_payload;
   op->flags = 0;
   op->reserved = NULL;
   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_OK;
   op->data.send_status_from_server.status_details = "xyz";
   op->flags = 0;
   op->reserved = NULL;
   op++;
   error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);

   cq_expect_completion(cqv, tag(103), 1);
   cq_expect_completion(cqv, tag(1), 1);
   cq_verify(cqv);

   GPR_ASSERT(status == GRPC_STATUS_OK);

   gpr_free(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_call_destroy(c);
   grpc_call_destroy(s);

   cq_verifier_destroy(cqv);

   grpc_byte_buffer_destroy(request_payload);
   grpc_byte_buffer_destroy(response_payload);
   grpc_byte_buffer_destroy(request_payload_recv);
   grpc_byte_buffer_destroy(response_payload_recv);
 }

 static void test_load_reporting_hook(grpc_end2end_test_config config) {
   aggregated_bw_stats *aggr_stats_server =
       gpr_malloc(sizeof(aggregated_bw_stats));
   memset(aggr_stats_server, 0, sizeof(aggregated_bw_stats));

   grpc_load_reporting_config *server_lrc =
       grpc_load_reporting_config_create(sample_fn, aggr_stats_server);

   /* Introduce load reporting for the server through its arguments */
   grpc_arg arg = grpc_load_reporting_config_create_arg(server_lrc);
   grpc_channel_args *lr_server_args =
       grpc_channel_args_copy_and_add(NULL, &arg, 1);

   grpc_end2end_test_fixture f =
       begin_test(config, "test_load_reporting_hook", NULL, lr_server_args);

   const char *method_name = "/gRPCFTW";
   const char *request_msg = "so long!";
   const char *response_msg = "I'm back!";
   request_response_with_payload(f, method_name, request_msg, response_msg);
   end_test(&f);
   grpc_channel_args_destroy(lr_server_args);
   config.tear_down_data(&f);

   if (aggr_stats_server->fully_processed) {
     GPR_ASSERT(aggr_stats_server->total_bytes ==
                5 + strlen(request_msg) + strlen(response_msg));

     GPR_ASSERT(aggr_stats_server->channel_creation_token == 0xCAFEFACE);
     GPR_ASSERT(aggr_stats_server->channel_destruction_token == 0xDEADFACE);

     GPR_ASSERT(aggr_stats_server->call_creation_token == 0xCAFED00D);
     GPR_ASSERT(aggr_stats_server->call_destruction_token == 0xDEADD00D);

     GPR_ASSERT(strcmp(aggr_stats_server->method_name, "/gRPCFTW") == 0);
   }

   gpr_free(aggr_stats_server->method_name);
   gpr_free(aggr_stats_server);
   grpc_load_reporting_config_destroy(server_lrc);
 }

 void load_reporting_hook(grpc_end2end_test_config config) {
   test_load_reporting_hook(config);
 }

 void load_reporting_hook_pre_init(void) {}
	/*
	*
	* Copyright 2016, Google Inc.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	*/

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

	#include <string.h>

	#include <grpc/byte_buffer.h>
	#include <grpc/support/alloc.h>
	#include <grpc/support/log.h>
	#include <grpc/support/string_util.h>
	#include <grpc/support/time.h>
	#include <grpc/support/useful.h>
	#include "test/core/end2end/cq_verifier.h"

	#include "src/core/ext/load_reporting/load_reporting.h"
	#include "src/core/lib/channel/channel_args.h"

	enum { TIMEOUT = 200000 };

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

	typedef struct {
	uint32_t call_creation_token; /* expected 0xCAFED00D */
	uint32_t call_destruction_token; /* expected 0xDEADD00D */
	uint32_t channel_creation_token; /* expected 0xCAFEFACE */
	uint32_t channel_destruction_token; /* expected 0xDEADFACE */

	char *method_name;

	uint64_t total_bytes;
	bool fully_processed;
	} aggregated_bw_stats;

	static void sample_fn(const grpc_load_reporting_call_data *call_data,
	void *user_data) {
	GPR_ASSERT(user_data != NULL);
	aggregated_bw_stats custom_stats = (aggregated_bw_stats )user_data;
	switch (call_data->source) {
	case GRPC_LR_POINT_CHANNEL_CREATION:
	custom_stats->channel_creation_token = 0xCAFEFACE;
	break;
	case GRPC_LR_POINT_CHANNEL_DESTRUCTION:
	custom_stats->channel_destruction_token = 0xDEADFACE;
	break;
	case GRPC_LR_POINT_CALL_CREATION:
	custom_stats->call_creation_token = 0xCAFED00D;
	break;
	case GRPC_LR_POINT_CALL_DESTRUCTION:
	custom_stats->method_name = gpr_strdup(call_data->method);
	custom_stats->call_destruction_token = 0xDEADD00D;
	custom_stats->total_bytes =
	call_data->final_info->stats.transport_stream_stats.outgoing
	.data_bytes +
	call_data->final_info->stats.transport_stream_stats.incoming
	.data_bytes;
	custom_stats->fully_processed = true;
	break;
	default:
	abort();
	}
	}

	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, "%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_time(int n) {
	return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
	}

	static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }

	static void drain_cq(grpc_completion_queue *cq) {
	grpc_event ev;
	do {
	ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
	} 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->cq, tag(1000));
	GPR_ASSERT(grpc_completion_queue_pluck(
	f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
	.type == GRPC_OP_COMPLETE);
	grpc_server_destroy(f->server);
	f->server = NULL;
	}

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

	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);
	}

	static void request_response_with_payload(grpc_end2end_test_fixture f,
	const char *method_name,
	const char *request_msg,
	const char *response_msg) {
	gpr_slice request_payload_slice = gpr_slice_from_copied_string(request_msg);
	gpr_slice response_payload_slice = gpr_slice_from_copied_string(response_msg);
	grpc_call *c;
	grpc_call *s;
	grpc_byte_buffer *request_payload =
	grpc_raw_byte_buffer_create(&request_payload_slice, 1);
	grpc_byte_buffer *response_payload =
	grpc_raw_byte_buffer_create(&response_payload_slice, 1);
	gpr_timespec deadline = five_seconds_time();
	cq_verifier *cqv = cq_verifier_create(f.cq);
	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_byte_buffer *request_payload_recv = NULL;
	grpc_byte_buffer *response_payload_recv = NULL;
	grpc_call_details call_details;
	grpc_status_code status;
	grpc_call_error error;
	char *details = NULL;
	size_t details_capacity = 0;
	int was_cancelled = 2;

	c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
	method_name, "foo.test.google.fr", deadline,
	NULL);
	GPR_ASSERT(c);

	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);

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message = request_payload;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_RECV_INITIAL_METADATA;
	op->data.recv_initial_metadata = &initial_metadata_recv;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message = &response_payload_recv;
	op->flags = 0;
	op->reserved = NULL;
	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->data.recv_status_on_client.status_details_capacity = &details_capacity;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
	GPR_ASSERT(GRPC_CALL_OK == error);

	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), 1);
	cq_verify(cqv);

	memset(ops, 0, sizeof(ops));
	op = ops;
	op->op = GRPC_OP_SEND_INITIAL_METADATA;
	op->data.send_initial_metadata.count = 0;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_RECV_MESSAGE;
	op->data.recv_message = &request_payload_recv;
	op->flags = 0;
	op->reserved = NULL;
	op++;
	error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
	GPR_ASSERT(GRPC_CALL_OK == error);

	cq_expect_completion(cqv, tag(102), 1);
	cq_verify(cqv);

	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->flags = 0;
	op->reserved = NULL;
	op++;
	op->op = GRPC_OP_SEND_MESSAGE;
	op->data.send_message = response_payload;
	op->flags = 0;
	op->reserved = NULL;
	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_OK;
	op->data.send_status_from_server.status_details = "xyz";
	op->flags = 0;
	op->reserved = NULL;
	op++;
	error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
	GPR_ASSERT(GRPC_CALL_OK == error);

	cq_expect_completion(cqv, tag(103), 1);
	cq_expect_completion(cqv, tag(1), 1);
	cq_verify(cqv);

	GPR_ASSERT(status == GRPC_STATUS_OK);

	gpr_free(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_call_destroy(c);
	grpc_call_destroy(s);

	cq_verifier_destroy(cqv);

	grpc_byte_buffer_destroy(request_payload);
	grpc_byte_buffer_destroy(response_payload);
	grpc_byte_buffer_destroy(request_payload_recv);
	grpc_byte_buffer_destroy(response_payload_recv);
	}

	static void test_load_reporting_hook(grpc_end2end_test_config config) {
	aggregated_bw_stats *aggr_stats_server =
	gpr_malloc(sizeof(aggregated_bw_stats));
	memset(aggr_stats_server, 0, sizeof(aggregated_bw_stats));

	grpc_load_reporting_config *server_lrc =
	grpc_load_reporting_config_create(sample_fn, aggr_stats_server);

	/* Introduce load reporting for the server through its arguments */
	grpc_arg arg = grpc_load_reporting_config_create_arg(server_lrc);
	grpc_channel_args *lr_server_args =
	grpc_channel_args_copy_and_add(NULL, &arg, 1);

	grpc_end2end_test_fixture f =
	begin_test(config, "test_load_reporting_hook", NULL, lr_server_args);

	const char *method_name = "/gRPCFTW";
	const char *request_msg = "so long!";
	const char *response_msg = "I'm back!";
	request_response_with_payload(f, method_name, request_msg, response_msg);
	end_test(&f);
	grpc_channel_args_destroy(lr_server_args);
	config.tear_down_data(&f);

	if (aggr_stats_server->fully_processed) {
	GPR_ASSERT(aggr_stats_server->total_bytes ==
	5 + strlen(request_msg) + strlen(response_msg));

	GPR_ASSERT(aggr_stats_server->channel_creation_token == 0xCAFEFACE);
	GPR_ASSERT(aggr_stats_server->channel_destruction_token == 0xDEADFACE);

	GPR_ASSERT(aggr_stats_server->call_creation_token == 0xCAFED00D);
	GPR_ASSERT(aggr_stats_server->call_destruction_token == 0xDEADD00D);

	GPR_ASSERT(strcmp(aggr_stats_server->method_name, "/gRPCFTW") == 0);
	}

	gpr_free(aggr_stats_server->method_name);
	gpr_free(aggr_stats_server);
	grpc_load_reporting_config_destroy(server_lrc);
	}

	void load_reporting_hook(grpc_end2end_test_config config) {
	test_load_reporting_hook(config);
	}

	void load_reporting_hook_pre_init(void) {}