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 * in the documentation and/or other materials provided with the
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#include "test/core/end2end/end2end_tests.h"

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

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

enum { TIMEOUT = 200000 };

static void *tag(gpr_intptr 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, "%s/%s", test_name, config.name);
  f = config.create_fixture(client_args, server_args);
  config.init_client(&f, client_args);
  config.init_server(&f, server_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 test_no_op(grpc_end2end_test_config config) {
  grpc_end2end_test_fixture f = begin_test(config, "no-op", NULL, NULL);
  end_test(&f);
  config.tear_down_data(&f);
}

void grpc_end2end_tests(grpc_end2end_test_config config) { test_no_op(config); }