text: /*
   *
   * Copyright 2015 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/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"
  #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,
                                              cancellation_mode mode,
                                              grpc_channel_args *client_args,
                                              grpc_channel_args *server_args) {
    grpc_end2end_test_fixture f;
    gpr_log(GPR_INFO, "Running test: %s/%s/%s", test_name, config.name,
            mode.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(), 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->shutdown_cq, tag(1000));
    GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_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);
    grpc_completion_queue_destroy(f->shutdown_cq);
  }
  
  /* Cancel and do nothing */
  static void test_cancel_in_a_vacuum(grpc_end2end_test_config config,
                                      cancellation_mode mode) {
    grpc_call *c;
    grpc_end2end_test_fixture f =
        begin_test(config, "test_cancel_in_a_vacuum", mode, NULL, NULL);
    cq_verifier *v_client = cq_verifier_create(f.cq);
  
    gpr_timespec deadline = five_seconds_from_now();
    c = grpc_channel_create_call(
        f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
        grpc_slice_from_static_string("/foo"),
        get_host_override_slice("foo.test.google.fr:1234", config), deadline,
        NULL);
    GPR_ASSERT(c);
  
    GPR_ASSERT(GRPC_CALL_OK == mode.initiate_cancel(c, NULL));
  
    grpc_call_unref(c);
  
    cq_verifier_destroy(v_client);
    end_test(&f);
    config.tear_down_data(&f);
  }
  
  void cancel_in_a_vacuum(grpc_end2end_test_config config) {
    unsigned i;
  
    for (i = 0; i < GPR_ARRAY_SIZE(cancellation_modes); i++) {
      test_cancel_in_a_vacuum(config, cancellation_modes[i]);
    }
  }
  
  void cancel_in_a_vacuum_pre_init(void) {}
  