text: /*
   *
   * Copyright 2015, 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 <string.h>
  
  #include <grpc/grpc.h>
  #include <grpc/support/alloc.h>
  #include <grpc/support/log.h>
  #include "src/core/lib/channel/channel_stack.h"
  #include "src/core/lib/iomgr/closure.h"
  #include "src/core/lib/surface/channel.h"
  #include "src/core/lib/transport/transport.h"
  #include "test/core/end2end/cq_verifier.h"
  #include "test/core/util/test_config.h"
  
  grpc_closure transport_op_cb;
  
  static void *tag(intptr_t x) { return (void *)x; }
  
  void verify_connectivity(grpc_exec_ctx *exec_ctx, void *arg,
                           grpc_error *error) {
    grpc_connectivity_state *state = arg;
    GPR_ASSERT(GRPC_CHANNEL_SHUTDOWN == *state);
    GPR_ASSERT(error == GRPC_ERROR_NONE);
  }
  
  void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
  
  void test_transport_op(grpc_channel *channel) {
    grpc_transport_op *op;
    grpc_channel_element *elem;
    grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  
    grpc_closure_init(&transport_op_cb, verify_connectivity, &state,
                      grpc_schedule_on_exec_ctx);
  
    op = grpc_make_transport_op(NULL);
    op->on_connectivity_state_change = &transport_op_cb;
    op->connectivity_state = &state;
    elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
    elem->filter->start_transport_op(&exec_ctx, elem, op);
    grpc_exec_ctx_finish(&exec_ctx);
  
    grpc_closure_init(&transport_op_cb, do_nothing, NULL,
                      grpc_schedule_on_exec_ctx);
    op = grpc_make_transport_op(&transport_op_cb);
    elem->filter->start_transport_op(&exec_ctx, elem, op);
    grpc_exec_ctx_finish(&exec_ctx);
  }
  
  int main(int argc, char **argv) {
    grpc_channel *chan;
    grpc_call *call;
    grpc_completion_queue *cq;
    cq_verifier *cqv;
    grpc_op ops[6];
    grpc_op *op;
    grpc_metadata_array initial_metadata_recv;
    grpc_metadata_array trailing_metadata_recv;
    grpc_status_code status;
    grpc_call_error error;
    char *details = NULL;
    size_t details_capacity = 0;
    char *peer;
  
    grpc_test_init(argc, argv);
    grpc_init();
  
    grpc_metadata_array_init(&initial_metadata_recv);
    grpc_metadata_array_init(&trailing_metadata_recv);
  
    chan = grpc_lame_client_channel_create(
        "lampoon:national", GRPC_STATUS_UNKNOWN, "Rpc sent on a lame channel.");
    GPR_ASSERT(chan);
  
    test_transport_op(chan);
  
    GPR_ASSERT(GRPC_CHANNEL_SHUTDOWN ==
               grpc_channel_check_connectivity_state(chan, 0));
  
    cq = grpc_completion_queue_create(NULL);
  
    call = grpc_channel_create_call(chan, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
                                    "/Foo", "anywhere",
                                    GRPC_TIMEOUT_SECONDS_TO_DEADLINE(100), NULL);
    GPR_ASSERT(call);
    cqv = cq_verifier_create(cq);
  
    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_INITIAL_METADATA;
    op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
    op->flags = 0;
    op->reserved = NULL;
    op++;
    error = grpc_call_start_batch(call, ops, (size_t)(op - ops), tag(1), NULL);
    GPR_ASSERT(GRPC_CALL_OK == error);
  
    /* the call should immediately fail */
    CQ_EXPECT_COMPLETION(cqv, tag(1), 0);
    cq_verify(cqv);
  
    memset(ops, 0, sizeof(ops));
    op = ops;
    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(call, ops, (size_t)(op - ops), tag(2), NULL);
    GPR_ASSERT(GRPC_CALL_OK == error);
  
    /* the call should immediately fail */
    CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
    cq_verify(cqv);
  
    peer = grpc_call_get_peer(call);
    GPR_ASSERT(strcmp(peer, "lampoon:national") == 0);
    gpr_free(peer);
  
    grpc_call_destroy(call);
    grpc_channel_destroy(chan);
    cq_verifier_destroy(cqv);
    grpc_completion_queue_destroy(cq);
  
    grpc_metadata_array_destroy(&initial_metadata_recv);
    grpc_metadata_array_destroy(&trailing_metadata_recv);
    gpr_free(details);
  
    grpc_shutdown();
  
    return 0;
  }
  