Removed obsolete lb_policies_test

2 files changed, 0 insertions, 1042 deletions

diff --git a/test/core/client_channel/BUILD b/test/core/client_channel/BUILD
index ec72e0ea72..890e03fec1 100644
--- a/test/core/client_channel/BUILD
+++ b/test/core/client_channel/BUILD
@@ -23,24 +23,11 @@ load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 grpc_fuzzer(
     name = "uri_fuzzer_test",
     srcs = ["uri_fuzzer_test.cc"],
-    language = "C++",
     corpus = "uri_corpus",
-    deps = [
-        "//:gpr",
-        "//:grpc",
-        "//test/core/util:grpc_test_util",
-    ],
-)
-
-grpc_cc_test(
-    name = "lb_policies_test",
-    srcs = ["lb_policies_test.cc"],
     language = "C++",
     deps = [
         "//:gpr",
         "//:grpc",
-        "//test/core/end2end:cq_verifier",
-        "//test/core/util:gpr_test_util",
         "//test/core/util:grpc_test_util",
     ],
 )
diff --git a/test/core/client_channel/lb_policies_test.cc b/test/core/client_channel/lb_policies_test.cc
deleted file mode 100644
index 716c63b9d0..0000000000
--- a/test/core/client_channel/lb_policies_test.cc
+++ /dev/null
@@ -1,1029 +0,0 @@
-/*
- *
- * 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 <stdarg.h>
-#include <string.h>
-
-#include <grpc/grpc.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/time.h>
-
-#include "src/core/ext/filters/client_channel/client_channel.h"
-#include "src/core/ext/filters/client_channel/lb_policy_registry.h"
-#include "src/core/lib/channel/channel_args.h"
-#include "src/core/lib/channel/channel_stack.h"
-#include "src/core/lib/gpr/string.h"
-#include "src/core/lib/surface/channel.h"
-#include "src/core/lib/surface/server.h"
-#include "test/core/end2end/cq_verifier.h"
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
-
-#define RETRY_TIMEOUT 300
-
-typedef struct servers_fixture {
-  size_t num_servers;
-  grpc_server** servers;
-  grpc_call** server_calls;
-  grpc_completion_queue* cq;
-  grpc_completion_queue* shutdown_cq;
-  char** servers_hostports;
-  grpc_metadata_array* request_metadata_recv;
-} servers_fixture;
-
-typedef struct request_sequences {
-  size_t n;         /* number of iterations */
-  int* connections; /* indexed by the interation number, value is the index of
-                       the server it connected to or -1 if none */
-  /* indexed by the interation number, value is the client connectivity state */
-  grpc_connectivity_state* connectivity_states;
-} request_sequences;
-
-typedef void (*verifier_fn)(const servers_fixture*, grpc_channel*,
-                            const request_sequences*, const size_t);
-
-typedef struct test_spec {
-  size_t num_iters;
-  size_t num_servers;
-
-  int** kill_at;
-  int** revive_at;
-
-  const char* description;
-
-  verifier_fn verifier;
-
-} test_spec;
-
-static void test_spec_reset(test_spec* spec) {
-  size_t i, j;
-
-  for (i = 0; i < spec->num_iters; i++) {
-    for (j = 0; j < spec->num_servers; j++) {
-      spec->kill_at[i][j] = 0;
-      spec->revive_at[i][j] = 0;
-    }
-  }
-}
-
-static test_spec* test_spec_create(size_t num_iters, size_t num_servers) {
-  test_spec* spec;
-  size_t i;
-
-  spec = static_cast<test_spec*>(gpr_malloc(sizeof(test_spec)));
-  spec->num_iters = num_iters;
-  spec->num_servers = num_servers;
-  spec->kill_at = static_cast<int**>(gpr_malloc(sizeof(int*) * num_iters));
-  spec->revive_at = static_cast<int**>(gpr_malloc(sizeof(int*) * num_iters));
-  for (i = 0; i < num_iters; i++) {
-    spec->kill_at[i] = static_cast<int*>(gpr_malloc(sizeof(int) * num_servers));
-    spec->revive_at[i] =
-        static_cast<int*>(gpr_malloc(sizeof(int) * num_servers));
-  }
-
-  test_spec_reset(spec);
-  return spec;
-}
-
-static void test_spec_destroy(test_spec* spec) {
-  size_t i;
-  for (i = 0; i < spec->num_iters; i++) {
-    gpr_free(spec->kill_at[i]);
-    gpr_free(spec->revive_at[i]);
-  }
-
-  gpr_free(spec->kill_at);
-  gpr_free(spec->revive_at);
-
-  gpr_free(spec);
-}
-
-static void* tag(intptr_t t) { return (void*)t; }
-
-static gpr_timespec n_millis_time(int n) {
-  return gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
-                      gpr_time_from_millis(n, GPR_TIMESPAN));
-}
-
-static void drain_cq(grpc_completion_queue* cq) {
-  grpc_event ev;
-  do {
-    ev = grpc_completion_queue_next(cq, n_millis_time(5000), nullptr);
-  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
-}
-
-static void kill_server(const servers_fixture* f, size_t i) {
-  gpr_log(GPR_INFO, "KILLING SERVER %" PRIuPTR, i);
-  GPR_ASSERT(f->servers[i] != nullptr);
-  grpc_server_shutdown_and_notify(f->servers[i], f->shutdown_cq, tag(10000));
-  GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(10000),
-                                         n_millis_time(5000), nullptr)
-                 .type == GRPC_OP_COMPLETE);
-  grpc_server_destroy(f->servers[i]);
-  f->servers[i] = nullptr;
-}
-
-typedef struct request_data {
-  grpc_metadata_array initial_metadata_recv;
-  grpc_metadata_array trailing_metadata_recv;
-  grpc_slice details;
-  grpc_status_code status;
-  grpc_call_details* call_details;
-} request_data;
-
-static void revive_server(const servers_fixture* f, request_data* rdata,
-                          size_t i) {
-  int got_port;
-  gpr_log(GPR_INFO, "RAISE AGAIN SERVER %" PRIuPTR, i);
-  GPR_ASSERT(f->servers[i] == nullptr);
-
-  gpr_log(GPR_DEBUG, "revive: %s", f->servers_hostports[i]);
-
-  f->servers[i] = grpc_server_create(nullptr, nullptr);
-  grpc_server_register_completion_queue(f->servers[i], f->cq, nullptr);
-  GPR_ASSERT((got_port = grpc_server_add_insecure_http2_port(
-                  f->servers[i], f->servers_hostports[i])) > 0);
-  grpc_server_start(f->servers[i]);
-
-  GPR_ASSERT(GRPC_CALL_OK ==
-             grpc_server_request_call(f->servers[i], &f->server_calls[i],
-                                      &rdata->call_details[i],
-                                      &f->request_metadata_recv[i], f->cq,
-                                      f->cq, tag(1000 + (int)i)));
-}
-
-static servers_fixture* setup_servers(const char* server_host,
-                                      request_data* rdata,
-                                      const size_t num_servers) {
-  servers_fixture* f =
-      static_cast<servers_fixture*>(gpr_malloc(sizeof(servers_fixture)));
-  size_t i;
-
-  f->num_servers = num_servers;
-  f->server_calls =
-      static_cast<grpc_call**>(gpr_malloc(sizeof(grpc_call*) * num_servers));
-  f->request_metadata_recv = static_cast<grpc_metadata_array*>(
-      gpr_malloc(sizeof(grpc_metadata_array) * num_servers));
-  /* Create servers. */
-  f->servers = static_cast<grpc_server**>(
-      gpr_malloc(sizeof(grpc_server*) * num_servers));
-  f->servers_hostports =
-      static_cast<char**>(gpr_malloc(sizeof(char*) * num_servers));
-  f->cq = grpc_completion_queue_create_for_next(nullptr);
-  f->shutdown_cq = grpc_completion_queue_create_for_pluck(nullptr);
-  for (i = 0; i < num_servers; i++) {
-    grpc_metadata_array_init(&f->request_metadata_recv[i]);
-    gpr_join_host_port(&f->servers_hostports[i], server_host,
-                       grpc_pick_unused_port_or_die());
-    f->servers[i] = nullptr;
-    revive_server(f, rdata, i);
-  }
-  return f;
-}
-
-static void teardown_servers(servers_fixture* f) {
-  size_t i;
-  /* Destroy server. */
-  for (i = 0; i < f->num_servers; i++) {
-    if (f->servers[i] == nullptr) continue;
-    grpc_server_shutdown_and_notify(f->servers[i], f->shutdown_cq, tag(10000));
-    GPR_ASSERT(grpc_completion_queue_pluck(f->shutdown_cq, tag(10000),
-                                           n_millis_time(5000), nullptr)
-                   .type == GRPC_OP_COMPLETE);
-    grpc_server_destroy(f->servers[i]);
-  }
-  grpc_completion_queue_shutdown(f->cq);
-  drain_cq(f->cq);
-  grpc_completion_queue_destroy(f->cq);
-  grpc_completion_queue_destroy(f->shutdown_cq);
-
-  gpr_free(f->servers);
-
-  for (i = 0; i < f->num_servers; i++) {
-    gpr_free(f->servers_hostports[i]);
-    grpc_metadata_array_destroy(&f->request_metadata_recv[i]);
-  }
-
-  gpr_free(f->servers_hostports);
-  gpr_free(f->request_metadata_recv);
-  gpr_free(f->server_calls);
-  gpr_free(f);
-}
-
-static request_sequences request_sequences_create(size_t n) {
-  request_sequences res;
-  res.n = n;
-  res.connections = static_cast<int*>(gpr_malloc(sizeof(*res.connections) * n));
-  res.connectivity_states = static_cast<grpc_connectivity_state*>(
-      gpr_malloc(sizeof(*res.connectivity_states) * n));
-  memset(res.connections, 0, sizeof(*res.connections) * n);
-  memset(res.connectivity_states, 0, sizeof(*res.connectivity_states) * n);
-  return res;
-}
-
-static void request_sequences_destroy(const request_sequences* rseqs) {
-  gpr_free(rseqs->connections);
-  gpr_free(rseqs->connectivity_states);
-}
-
-/** Returns connection sequence (server indices), which must be freed */
-static request_sequences perform_request(servers_fixture* f,
-                                         grpc_channel* client,
-                                         request_data* rdata,
-                                         const test_spec* spec) {
-  grpc_call* c;
-  int s_idx;
-  int* s_valid;
-  grpc_op ops[6];
-  grpc_op* op;
-  int was_cancelled;
-  size_t i, iter_num;
-  grpc_event ev;
-  int read_tag;
-  int completed_client;
-  const request_sequences sequences = request_sequences_create(spec->num_iters);
-
-  s_valid = static_cast<int*>(gpr_malloc(sizeof(int) * f->num_servers));
-
-  for (iter_num = 0; iter_num < spec->num_iters; iter_num++) {
-    cq_verifier* cqv = cq_verifier_create(f->cq);
-    was_cancelled = 2;
-
-    for (i = 0; i < f->num_servers; i++) {
-      if (spec->kill_at[iter_num][i] != 0) {
-        kill_server(f, i);
-      } else if (spec->revive_at[iter_num][i] != 0) {
-        /* killing takes precedence */
-        revive_server(f, rdata, i);
-      }
-    }
-
-    sequences.connections[iter_num] = -1;
-    grpc_metadata_array_init(&rdata->initial_metadata_recv);
-    grpc_metadata_array_init(&rdata->trailing_metadata_recv);
-
-    for (i = 0; i < f->num_servers; i++) {
-      grpc_call_details_init(&rdata->call_details[i]);
-    }
-    memset(s_valid, 0, f->num_servers * sizeof(int));
-
-    grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
-    c = grpc_channel_create_call(client, nullptr, GRPC_PROPAGATE_DEFAULTS,
-                                 f->cq, grpc_slice_from_static_string("/foo"),
-                                 &host, gpr_inf_future(GPR_CLOCK_REALTIME),
-                                 nullptr);
-    GPR_ASSERT(c);
-    completed_client = 0;
-
-    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 = nullptr;
-    op++;
-    op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-    op->flags = 0;
-    op->reserved = nullptr;
-    op++;
-    op->op = GRPC_OP_RECV_INITIAL_METADATA;
-    op->data.recv_initial_metadata.recv_initial_metadata =
-        &rdata->initial_metadata_recv;
-    op->flags = 0;
-    op->reserved = nullptr;
-    op++;
-    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
-    op->data.recv_status_on_client.trailing_metadata =
-        &rdata->trailing_metadata_recv;
-    op->data.recv_status_on_client.status = &rdata->status;
-    op->data.recv_status_on_client.status_details = &rdata->details;
-    op->flags = 0;
-    op->reserved = nullptr;
-    op++;
-    GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(c, ops, (size_t)(op - ops),
-                                                     tag(1), nullptr));
-
-    s_idx = -1;
-    while ((ev = grpc_completion_queue_next(
-                f->cq, grpc_timeout_milliseconds_to_deadline(RETRY_TIMEOUT),
-                nullptr))
-               .type != GRPC_QUEUE_TIMEOUT) {
-      GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
-      read_tag = ((int)(intptr_t)ev.tag);
-      const grpc_connectivity_state conn_state =
-          grpc_channel_check_connectivity_state(client, 0);
-      sequences.connectivity_states[iter_num] = conn_state;
-      gpr_log(GPR_DEBUG, "EVENT: success:%d, type:%d, tag:%d iter:%" PRIuPTR,
-              ev.success, ev.type, read_tag, iter_num);
-      if (ev.success && read_tag >= 1000) {
-        GPR_ASSERT(s_idx == -1); /* only one server must reply */
-        /* only server notifications for non-shutdown events */
-        s_idx = read_tag - 1000;
-        s_valid[s_idx] = 1;
-        sequences.connections[iter_num] = s_idx;
-        break;
-      } else if (read_tag == 1) {
-        gpr_log(GPR_DEBUG, "client timed out");
-        GPR_ASSERT(ev.success);
-        completed_client = 1;
-      }
-    }
-
-    if (s_idx >= 0) {
-      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 = nullptr;
-      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_UNIMPLEMENTED;
-      grpc_slice status_details = grpc_slice_from_static_string("xyz");
-      op->data.send_status_from_server.status_details = &status_details;
-      op->flags = 0;
-      op->reserved = nullptr;
-      op++;
-      op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
-      op->data.recv_close_on_server.cancelled = &was_cancelled;
-      op->flags = 0;
-      op->reserved = nullptr;
-      op++;
-      GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(f->server_calls[s_idx],
-                                                       ops, (size_t)(op - ops),
-                                                       tag(102), nullptr));
-
-      CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
-      if (!completed_client) {
-        CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
-      }
-      cq_verify(cqv);
-
-      GPR_ASSERT(rdata->status == GRPC_STATUS_UNIMPLEMENTED);
-      GPR_ASSERT(0 == grpc_slice_str_cmp(rdata->details, "xyz"));
-      GPR_ASSERT(0 ==
-                 grpc_slice_str_cmp(rdata->call_details[s_idx].method, "/foo"));
-      GPR_ASSERT(0 == grpc_slice_str_cmp(rdata->call_details[s_idx].host,
-                                         "foo.test.google.fr"));
-      GPR_ASSERT(was_cancelled == 1);
-
-      grpc_call_unref(f->server_calls[s_idx]);
-
-      /* ask for the next request on this server */
-      GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
-                                     f->servers[s_idx], &f->server_calls[s_idx],
-                                     &rdata->call_details[s_idx],
-                                     &f->request_metadata_recv[s_idx], f->cq,
-                                     f->cq, tag(1000 + (int)s_idx)));
-    } else { /* no response from server */
-      grpc_call_cancel(c, nullptr);
-      if (!completed_client) {
-        CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
-        cq_verify(cqv);
-      }
-    }
-
-    GPR_ASSERT(grpc_completion_queue_next(
-                   f->cq, grpc_timeout_milliseconds_to_deadline(RETRY_TIMEOUT),
-                   nullptr)
-                   .type == GRPC_QUEUE_TIMEOUT);
-
-    grpc_metadata_array_destroy(&rdata->initial_metadata_recv);
-    grpc_metadata_array_destroy(&rdata->trailing_metadata_recv);
-
-    cq_verifier_destroy(cqv);
-
-    grpc_call_unref(c);
-
-    for (i = 0; i < f->num_servers; i++) {
-      grpc_call_details_destroy(&rdata->call_details[i]);
-    }
-    grpc_slice_unref(rdata->details);
-  }
-
-  gpr_free(s_valid);
-
-  return sequences;
-}
-
-static grpc_call** perform_multirequest(servers_fixture* f,
-                                        grpc_channel* client,
-                                        size_t concurrent_calls) {
-  grpc_call** calls;
-  grpc_op ops[6];
-  grpc_op* op;
-  size_t i;
-
-  calls = static_cast<grpc_call**>(
-      gpr_malloc(sizeof(grpc_call*) * concurrent_calls));
-  for (i = 0; i < f->num_servers; i++) {
-    kill_server(f, i);
-  }
-
-  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 = nullptr;
-  op++;
-  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
-  op->flags = 0;
-  op->reserved = nullptr;
-
-  grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
-  for (i = 0; i < concurrent_calls; i++) {
-    calls[i] = grpc_channel_create_call(
-        client, nullptr, GRPC_PROPAGATE_DEFAULTS, f->cq,
-        grpc_slice_from_static_string("/foo"), &host,
-        gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
-    GPR_ASSERT(calls[i]);
-    GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(calls[i], ops,
-                                                     (size_t)(op - ops), tag(1),
-                                                     nullptr));
-  }
-
-  return calls;
-}
-
-void run_spec(const test_spec* spec) {
-  grpc_channel* client;
-  char* client_hostport;
-  char* servers_hostports_str;
-  request_data rdata;
-  servers_fixture* f;
-  grpc_channel_args args;
-  grpc_arg arg_array[2];
-  rdata.call_details = static_cast<grpc_call_details*>(
-      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers));
-  f = setup_servers("127.0.0.1", &rdata, spec->num_servers);
-
-  /* Create client. */
-  servers_hostports_str = gpr_strjoin_sep((const char**)f->servers_hostports,
-                                          f->num_servers, ",", nullptr);
-  gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
-
-  arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key =
-      const_cast<char*>("grpc.testing.fixed_reconnect_backoff_ms");
-  arg_array[0].value.integer = RETRY_TIMEOUT;
-  arg_array[1].type = GRPC_ARG_STRING;
-  arg_array[1].key = const_cast<char*>(GRPC_ARG_LB_POLICY_NAME);
-  arg_array[1].value.string = const_cast<char*>("round_robin");
-  args.num_args = 2;
-  args.args = arg_array;
-
-  client = grpc_insecure_channel_create(client_hostport, &args, nullptr);
-
-  gpr_log(GPR_INFO, "Testing '%s' with servers=%s client=%s", spec->description,
-          servers_hostports_str, client_hostport);
-
-  const request_sequences sequences = perform_request(f, client, &rdata, spec);
-
-  spec->verifier(f, client, &sequences, spec->num_iters);
-
-  gpr_free(client_hostport);
-  gpr_free(servers_hostports_str);
-  gpr_free(rdata.call_details);
-  request_sequences_destroy(&sequences);
-
-  grpc_channel_destroy(client); /* calls the LB's shutdown func */
-  teardown_servers(f);
-}
-
-static grpc_channel* create_client(const servers_fixture* f) {
-  grpc_channel* client;
-  char* client_hostport;
-  char* servers_hostports_str;
-  grpc_arg arg_array[3];
-  grpc_channel_args args;
-
-  servers_hostports_str = gpr_strjoin_sep((const char**)f->servers_hostports,
-                                          f->num_servers, ",", nullptr);
-  gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
-
-  arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key =
-      const_cast<char*>("grpc.testing.fixed_reconnect_backoff_ms");
-  arg_array[0].value.integer = RETRY_TIMEOUT;
-  arg_array[1].type = GRPC_ARG_STRING;
-  arg_array[1].key = const_cast<char*>(GRPC_ARG_LB_POLICY_NAME);
-  arg_array[1].value.string = const_cast<char*>("ROUND_ROBIN");
-  arg_array[2].type = GRPC_ARG_INTEGER;
-  arg_array[2].key =
-      const_cast<char*>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
-  arg_array[2].value.integer = 0;
-  args.num_args = GPR_ARRAY_SIZE(arg_array);
-  args.args = arg_array;
-
-  client = grpc_insecure_channel_create(client_hostport, &args, nullptr);
-  gpr_free(client_hostport);
-  gpr_free(servers_hostports_str);
-
-  return client;
-}
-
-static void test_ping() {
-  grpc_channel* client;
-  request_data rdata;
-  servers_fixture* f;
-  cq_verifier* cqv;
-  grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
-  const size_t num_servers = 1;
-  int i;
-
-  rdata.call_details = static_cast<grpc_call_details*>(
-      gpr_malloc(sizeof(grpc_call_details) * num_servers));
-  f = setup_servers("127.0.0.1", &rdata, num_servers);
-  cqv = cq_verifier_create(f->cq);
-
-  client = create_client(f);
-
-  grpc_channel_ping(client, f->cq, tag(0), nullptr);
-  CQ_EXPECT_COMPLETION(cqv, tag(0), 0);
-
-  /* check that we're still in idle, and start connecting */
-  GPR_ASSERT(grpc_channel_check_connectivity_state(client, 1) ==
-             GRPC_CHANNEL_IDLE);
-  /* we'll go through some set of transitions (some might be missed), until
-     READY is reached */
-  while (state != GRPC_CHANNEL_READY) {
-    grpc_channel_watch_connectivity_state(
-        client, state, grpc_timeout_seconds_to_deadline(3), f->cq, tag(99));
-    CQ_EXPECT_COMPLETION(cqv, tag(99), 1);
-    cq_verify(cqv);
-    state = grpc_channel_check_connectivity_state(client, 0);
-    GPR_ASSERT(state == GRPC_CHANNEL_READY ||
-               state == GRPC_CHANNEL_CONNECTING ||
-               state == GRPC_CHANNEL_TRANSIENT_FAILURE);
-  }
-
-  for (i = 1; i <= 5; i++) {
-    grpc_channel_ping(client, f->cq, tag(i), nullptr);
-    CQ_EXPECT_COMPLETION(cqv, tag(i), 1);
-    cq_verify(cqv);
-  }
-  gpr_free(rdata.call_details);
-
-  grpc_channel_destroy(client);
-  teardown_servers(f);
-
-  cq_verifier_destroy(cqv);
-}
-
-static void test_pending_calls(size_t concurrent_calls) {
-  size_t i;
-  grpc_call** calls;
-  grpc_channel* client;
-  request_data rdata;
-  servers_fixture* f;
-  test_spec* spec = test_spec_create(0, 4);
-  rdata.call_details = static_cast<grpc_call_details*>(
-      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers));
-  f = setup_servers("127.0.0.1", &rdata, spec->num_servers);
-
-  client = create_client(f);
-  calls = perform_multirequest(f, client, concurrent_calls);
-  grpc_call_cancel(calls[0], nullptr); /* exercise the cancel pick path whilst
-                                          there are pending picks */
-
-  gpr_free(rdata.call_details);
-
-  grpc_channel_destroy(client); /* calls the LB's shutdown func */
-  /* destroy the calls after the channel so that they are still around for the
-   * LB's shutdown func to process */
-  for (i = 0; i < concurrent_calls; i++) {
-    grpc_call_unref(calls[i]);
-  }
-  gpr_free(calls);
-  teardown_servers(f);
-  test_spec_destroy(spec);
-}
-
-static void test_get_channel_info() {
-  grpc_channel* channel =
-      grpc_insecure_channel_create("ipv4:127.0.0.1:1234", nullptr, nullptr);
-  // Ensures that resolver returns.
-  grpc_channel_check_connectivity_state(channel, true /* try_to_connect */);
-  // First, request no fields.  This is a no-op.
-  grpc_channel_info channel_info;
-  memset(&channel_info, 0, sizeof(channel_info));
-  grpc_channel_get_info(channel, &channel_info);
-  // Request LB policy name.
-  char* lb_policy_name = nullptr;
-  channel_info.lb_policy_name = &lb_policy_name;
-  grpc_channel_get_info(channel, &channel_info);
-  GPR_ASSERT(lb_policy_name != nullptr);
-  GPR_ASSERT(strcmp(lb_policy_name, "pick_first") == 0);
-  gpr_free(lb_policy_name);
-  // Request service config, which does not exist, so we'll get nothing back.
-  memset(&channel_info, 0, sizeof(channel_info));
-  char* service_config_json = const_cast<char*>("dummy_string");
-  channel_info.service_config_json = &service_config_json;
-  grpc_channel_get_info(channel, &channel_info);
-  GPR_ASSERT(service_config_json == nullptr);
-  // Recreate the channel such that it has a service config.
-  grpc_channel_destroy(channel);
-  grpc_arg arg;
-  arg.type = GRPC_ARG_STRING;
-  arg.key = const_cast<char*>(GRPC_ARG_SERVICE_CONFIG);
-  arg.value.string =
-      const_cast<char*>("{\"loadBalancingPolicy\": \"ROUND_ROBIN\"}");
-  grpc_channel_args* args = grpc_channel_args_copy_and_add(nullptr, &arg, 1);
-  channel = grpc_insecure_channel_create("ipv4:127.0.0.1:1234", args, nullptr);
-  {
-    grpc_core::ExecCtx exec_ctx;
-    grpc_channel_args_destroy(args);
-  }
-  // Ensures that resolver returns.
-  grpc_channel_check_connectivity_state(channel, true /* try_to_connect */);
-  // Now request the service config again.
-  grpc_channel_get_info(channel, &channel_info);
-  GPR_ASSERT(service_config_json != nullptr);
-  GPR_ASSERT(strcmp(service_config_json, arg.value.string) == 0);
-  gpr_free(service_config_json);
-  // Clean up.
-  grpc_channel_destroy(channel);
-}
-
-static void print_failed_expectations(const int* expected_connection_sequence,
-                                      const int* actual_connection_sequence,
-                                      const size_t expected_seq_length,
-                                      const size_t num_iters) {
-  size_t i;
-  for (i = 0; i < num_iters; i++) {
-    gpr_log(GPR_ERROR,
-            "FAILURE: Iter (expected, actual): %" PRIuPTR " (%d, %d)", i,
-            expected_connection_sequence[i % expected_seq_length],
-            actual_connection_sequence[i]);
-  }
-}
-
-static void verify_vanilla_round_robin(const servers_fixture* f,
-                                       grpc_channel* client,
-                                       const request_sequences* sequences,
-                                       const size_t num_iters) {
-  const size_t expected_seq_length = f->num_servers;
-
-  /* verify conn. seq. expectation */
-  /* get the first sequence of "num_servers" elements */
-  int* expected_connection_sequence =
-      static_cast<int*>(gpr_malloc(sizeof(int) * expected_seq_length));
-  memcpy(expected_connection_sequence, sequences->connections,
-         sizeof(int) * expected_seq_length);
-
-  for (size_t i = 0; i < num_iters; i++) {
-    const int actual = sequences->connections[i];
-    const int expected = expected_connection_sequence[i % expected_seq_length];
-    if (actual != expected) {
-      gpr_log(
-          GPR_ERROR,
-          "CONNECTION SEQUENCE FAILURE: expected %d, got %d at iteration #%d",
-          expected, actual, (int)i);
-      abort();
-    }
-  }
-
-  /* All servers are available, therefore all client subchannels are READY, even
-   * when we only need one for the client channel state to be READY */
-  for (size_t i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual =
-        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
-    const grpc_connectivity_state expected = GRPC_CHANNEL_READY;
-    if (actual != expected) {
-      gpr_log(GPR_ERROR,
-              "CONNECTIVITY STATUS SEQUENCE FAILURE: expected '%s', got '%s' "
-              "at iteration #%d",
-              grpc_connectivity_state_name(expected),
-              grpc_connectivity_state_name(actual), (int)i);
-      abort();
-    }
-  }
-
-  gpr_free(expected_connection_sequence);
-}
-
-/* At the start of the second iteration, all but the first and last servers (as
- * given in "f") are killed */
-static void verify_vanishing_floor_round_robin(
-    const servers_fixture* f, grpc_channel* client,
-    const request_sequences* sequences, const size_t num_iters) {
-  int* expected_connection_sequence;
-  const size_t expected_seq_length = 2;
-  size_t i;
-
-  /* verify conn. seq. expectation */
-  /* copy the first full sequence (without -1s) */
-  expected_connection_sequence =
-      static_cast<int*>(gpr_malloc(sizeof(int) * expected_seq_length));
-  memcpy(expected_connection_sequence, sequences->connections + 2,
-         expected_seq_length * sizeof(int));
-
-  /* first two elements of the sequence should be [0 (1st server), -1 (failure)]
-   */
-  GPR_ASSERT(sequences->connections[0] == 0);
-  GPR_ASSERT(sequences->connections[1] == -1);
-
-  /* the next two element must be [3, 0], repeating from that point: the 3 is
-   * brought forth by servers 1 and 2 disappearing after the intial pick of 0 */
-  GPR_ASSERT(sequences->connections[2] == 3);
-  GPR_ASSERT(sequences->connections[3] == 0);
-
-  /* make sure that the expectation obliges */
-  for (i = 2; i < num_iters; i++) {
-    const int actual = sequences->connections[i];
-    const int expected = expected_connection_sequence[i % expected_seq_length];
-    if (actual != expected) {
-      print_failed_expectations(expected_connection_sequence,
-                                sequences->connections, expected_seq_length,
-                                num_iters);
-      abort();
-    }
-  }
-
-  /* There's always at least one subchannel READY (connected), therefore the
-   * overall state of the client channel is READY at all times. */
-  for (i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual =
-        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
-    const grpc_connectivity_state expected = GRPC_CHANNEL_READY;
-    if (actual != expected) {
-      gpr_log(GPR_ERROR,
-              "CONNECTIVITY STATUS SEQUENCE FAILURE: expected '%s', got '%s' "
-              "at iteration #%d",
-              grpc_connectivity_state_name(expected),
-              grpc_connectivity_state_name(actual), (int)i);
-      abort();
-    }
-  }
-
-  gpr_free(expected_connection_sequence);
-}
-
-static void verify_total_carnage_round_robin(const servers_fixture* f,
-                                             grpc_channel* client,
-                                             const request_sequences* sequences,
-                                             const size_t num_iters) {
-  for (size_t i = 0; i < num_iters; i++) {
-    const int actual = sequences->connections[i];
-    const int expected = -1;
-    if (actual != expected) {
-      gpr_log(
-          GPR_ERROR,
-          "CONNECTION SEQUENCE FAILURE: expected %d, got %d at iteration #%d",
-          expected, actual, (int)i);
-      abort();
-    }
-  }
-
-  /* No server is ever available. There should be no READY states (or SHUTDOWN).
-   * Note that all other states (IDLE, CONNECTING, TRANSIENT_FAILURE) are still
-   * possible, as the policy transitions while attempting to reconnect. */
-  for (size_t i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual =
-        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
-    if (actual == GRPC_CHANNEL_READY || actual == GRPC_CHANNEL_SHUTDOWN) {
-      gpr_log(GPR_ERROR,
-              "CONNECTIVITY STATUS SEQUENCE FAILURE: got unexpected state "
-              "'%s' at iteration #%d.",
-              grpc_connectivity_state_name(actual), (int)i);
-      abort();
-    }
-  }
-}
-
-static void verify_partial_carnage_round_robin(
-    const servers_fixture* f, grpc_channel* client,
-    const request_sequences* sequences, const size_t num_iters) {
-  int* expected_connection_sequence;
-  size_t i;
-  const size_t expected_seq_length = f->num_servers;
-
-  /* verify conn. seq. expectation */
-  /* get the first sequence of "num_servers" elements */
-  expected_connection_sequence =
-      static_cast<int*>(gpr_malloc(sizeof(int) * expected_seq_length));
-  memcpy(expected_connection_sequence, sequences->connections,
-         sizeof(int) * expected_seq_length);
-
-  for (i = 0; i < num_iters / 2; i++) {
-    const int actual = sequences->connections[i];
-    const int expected = expected_connection_sequence[i % expected_seq_length];
-    if (actual != expected) {
-      print_failed_expectations(expected_connection_sequence,
-                                sequences->connections, expected_seq_length,
-                                num_iters);
-      abort();
-    }
-  }
-
-  /* second half of the iterations go without response */
-  for (; i < num_iters; i++) {
-    GPR_ASSERT(sequences->connections[i] == -1);
-  }
-
-  /* We can assert that the first client channel state should be READY, when all
-   * servers were available */
-  grpc_connectivity_state actual =
-      static_cast<grpc_connectivity_state>(sequences->connectivity_states[0]);
-  grpc_connectivity_state expected = GRPC_CHANNEL_READY;
-  if (actual != expected) {
-    gpr_log(GPR_ERROR,
-            "CONNECTIVITY STATUS SEQUENCE FAILURE: expected '%s', got '%s' "
-            "at iteration #%d",
-            grpc_connectivity_state_name(expected),
-            grpc_connectivity_state_name(actual), 0);
-    abort();
-  }
-
-  /* ... and that the last one shouldn't be READY (or SHUTDOWN): all servers are
-   * gone. It may be all other states (IDLE, CONNECTING, TRANSIENT_FAILURE), as
-   * the policy transitions while attempting to reconnect. */
-  actual = static_cast<grpc_connectivity_state>(
-      sequences->connectivity_states[num_iters - 1]);
-  for (i = 0; i < sequences->n; i++) {
-    if (actual == GRPC_CHANNEL_READY || actual == GRPC_CHANNEL_SHUTDOWN) {
-      gpr_log(GPR_ERROR,
-              "CONNECTIVITY STATUS SEQUENCE FAILURE: got unexpected state "
-              "'%s' at iteration #%d.",
-              grpc_connectivity_state_name(actual), (int)i);
-      abort();
-    }
-  }
-  gpr_free(expected_connection_sequence);
-}
-
-static void dump_array(const char* desc, const int* data, const size_t count) {
-  gpr_strvec s;
-  char* tmp;
-  size_t i;
-  gpr_strvec_init(&s);
-  gpr_strvec_add(&s, gpr_strdup(desc));
-  gpr_strvec_add(&s, gpr_strdup(":"));
-  for (i = 0; i < count; i++) {
-    gpr_asprintf(&tmp, " %d", data[i]);
-    gpr_strvec_add(&s, tmp);
-  }
-  tmp = gpr_strvec_flatten(&s, nullptr);
-  gpr_strvec_destroy(&s);
-  gpr_log(GPR_DEBUG, "%s", tmp);
-  gpr_free(tmp);
-}
-
-static void verify_rebirth_round_robin(const servers_fixture* f,
-                                       grpc_channel* client,
-                                       const request_sequences* sequences,
-                                       const size_t num_iters) {
-  dump_array("actual_connection_sequence", sequences->connections, num_iters);
-
-  /* first iteration succeeds */
-  GPR_ASSERT(sequences->connections[0] != -1);
-  /* then we fail for a while... */
-  GPR_ASSERT(sequences->connections[1] == -1);
-  /* ... but should be up eventually */
-  size_t first_iter_back_up = ~0ul;
-  for (size_t i = 2; i < sequences->n; ++i) {
-    if (sequences->connections[i] != -1) {
-      first_iter_back_up = i;
-      break;
-    }
-  }
-  GPR_ASSERT(first_iter_back_up != ~0ul);
-
-  /* We can assert that the first client channel state should be READY, when all
-   * servers were available; same thing for the last one. In the middle
-   * somewhere there must exist at least one TRANSIENT_FAILURE */
-  grpc_connectivity_state actual =
-      static_cast<grpc_connectivity_state>(sequences->connectivity_states[0]);
-  grpc_connectivity_state expected = GRPC_CHANNEL_READY;
-  if (actual != expected) {
-    gpr_log(GPR_ERROR,
-            "CONNECTIVITY STATUS SEQUENCE FAILURE: expected '%s', got '%s' "
-            "at iteration #%d",
-            grpc_connectivity_state_name(expected),
-            grpc_connectivity_state_name(actual), 0);
-    abort();
-  }
-
-  actual = static_cast<grpc_connectivity_state>(
-      sequences->connectivity_states[num_iters - 1]);
-  expected = GRPC_CHANNEL_READY;
-  if (actual != expected) {
-    gpr_log(GPR_ERROR,
-            "CONNECTIVITY STATUS SEQUENCE FAILURE: expected '%s', got '%s' "
-            "at iteration #%d",
-            grpc_connectivity_state_name(expected),
-            grpc_connectivity_state_name(actual), (int)num_iters - 1);
-    abort();
-  }
-
-  bool found_failure_status = false;
-  for (size_t i = 1; i < sequences->n - 1; i++) {
-    if (sequences->connectivity_states[i] == GRPC_CHANNEL_TRANSIENT_FAILURE) {
-      found_failure_status = true;
-      break;
-    }
-  }
-  if (!found_failure_status) {
-    gpr_log(
-        GPR_ERROR,
-        "CONNECTIVITY STATUS SEQUENCE FAILURE: "
-        "GRPC_CHANNEL_TRANSIENT_FAILURE status not found. Got the following "
-        "instead:");
-    for (size_t i = 0; i < num_iters; i++) {
-      gpr_log(GPR_ERROR, "[%d]: %s", (int)i,
-              grpc_connectivity_state_name(static_cast<grpc_connectivity_state>(
-                  sequences->connectivity_states[i])));
-    }
-  }
-}
-
-int main(int argc, char** argv) {
-  grpc_core::ExecCtx exec_ctx;
-  test_spec* spec;
-  size_t i;
-  const size_t NUM_ITERS = 10;
-  const size_t NUM_SERVERS = 4;
-
-  grpc_init();
-  grpc_test_init(argc, argv);
-  grpc_tracer_set_enabled("round_robin", 1);
-
-  GPR_ASSERT(grpc_lb_policy_create("this-lb-policy-does-not-exist", nullptr) ==
-             nullptr);
-  GPR_ASSERT(grpc_lb_policy_create(nullptr, nullptr) == nullptr);
-
-  spec = test_spec_create(NUM_ITERS, NUM_SERVERS);
-  /* everything is fine, all servers stay up the whole time and life's peachy
-   */
-  spec->verifier = verify_vanilla_round_robin;
-  spec->description = "test_all_server_up";
-  run_spec(spec);
-
-  /* Kill all servers first thing in the morning */
-  test_spec_reset(spec);
-  spec->verifier = verify_total_carnage_round_robin;
-  spec->description = "test_kill_all_server";
-  for (i = 0; i < NUM_SERVERS; i++) {
-    spec->kill_at[0][i] = 1;
-  }
-  run_spec(spec);
-
-  /* at the start of the 2nd iteration, kill all but the first and last
-   * servers.
-   * This should knock down the server bound to be selected next */
-  test_spec_reset(spec);
-  spec->verifier = verify_vanishing_floor_round_robin;
-  spec->description = "test_kill_middle_servers_at_2nd_iteration";
-  for (i = 1; i < NUM_SERVERS - 1; i++) {
-    spec->kill_at[1][i] = 1;
-  }
-  run_spec(spec);
-
-  /* Midway, kill all servers. */
-  test_spec_reset(spec);
-  spec->verifier = verify_partial_carnage_round_robin;
-  spec->description = "test_kill_all_server_midway";
-  for (i = 0; i < NUM_SERVERS; i++) {
-    spec->kill_at[spec->num_iters / 2][i] = 1;
-  }
-  run_spec(spec);
-
-  /* After first iteration, kill all servers. On the third one, bring them all
-   * back up. */
-  test_spec_reset(spec);
-  spec->verifier = verify_rebirth_round_robin;
-  spec->description = "test_kill_all_server_after_1st_resurrect_at_3rd";
-  for (i = 0; i < NUM_SERVERS; i++) {
-    spec->kill_at[1][i] = 1;
-    spec->revive_at[3][i] = 1;
-  }
-  run_spec(spec);
-  test_spec_destroy(spec);
-
-  test_pending_calls(4);
-  test_ping();
-  test_get_channel_info();
-
-  grpc_shutdown();
-  return 0;
-}