Initial checkin of gRPC to third_party/

third_party/grpc/test/core/end2end/tests/connectivity.c

+/*
+ *
+ * Copyright 2015-2016, 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 <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+
+#include "test/core/end2end/cq_verifier.h"
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+typedef struct {
+  gpr_event started;
+  grpc_channel *channel;
+  grpc_completion_queue *cq;
+} child_events;
+
+static void child_thread(void *arg) {
+  child_events *ce = arg;
+  grpc_event ev;
+  gpr_event_set(&ce->started, (void *)1);
+  gpr_log(GPR_DEBUG, "verifying");
+  ev = grpc_completion_queue_next(ce->cq, gpr_inf_future(GPR_CLOCK_MONOTONIC),
+                                  NULL);
+  GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+  GPR_ASSERT(ev.tag == tag(1));
+  GPR_ASSERT(ev.success == 0);
+}
+
+static void test_connectivity(grpc_end2end_test_config config) {
+  grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
+  grpc_connectivity_state state;
+  cq_verifier *cqv = cq_verifier_create(f.cq);
+  child_events ce;
+  gpr_thd_options thdopt = gpr_thd_options_default();
+  gpr_thd_id thdid;
+
+  config.init_client(&f, NULL);
+
+  ce.channel = f.client;
+  ce.cq = f.cq;
+  gpr_event_init(&ce.started);
+  gpr_thd_options_set_joinable(&thdopt);
+  GPR_ASSERT(gpr_thd_new(&thdid, child_thread, &ce, &thdopt));
+
+  gpr_event_wait(&ce.started, gpr_inf_future(GPR_CLOCK_MONOTONIC));
+
+  /* channels should start life in IDLE, and stay there */
+  GPR_ASSERT(grpc_channel_check_connectivity_state(f.client, 0) ==
+             GRPC_CHANNEL_IDLE);
+  gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(100));
+  GPR_ASSERT(grpc_channel_check_connectivity_state(f.client, 0) ==
+             GRPC_CHANNEL_IDLE);
+
+  /* start watching for a change */
+  gpr_log(GPR_DEBUG, "watching");
+  grpc_channel_watch_connectivity_state(
+      f.client, GRPC_CHANNEL_IDLE, gpr_now(GPR_CLOCK_MONOTONIC), f.cq, tag(1));
+
+  /* eventually the child thread completion should trigger */
+  gpr_thd_join(thdid);
+
+  /* check that we're still in idle, and start connecting */
+  GPR_ASSERT(grpc_channel_check_connectivity_state(f.client, 1) ==
+             GRPC_CHANNEL_IDLE);
+  /* start watching for a change */
+  grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_IDLE,
+                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        f.cq, tag(2));
+
+  /* and now the watch should trigger */
+  cq_expect_completion(cqv, tag(2), 1);
+  cq_verify(cqv);
+  state = grpc_channel_check_connectivity_state(f.client, 0);
+  GPR_ASSERT(state == GRPC_CHANNEL_TRANSIENT_FAILURE ||
+             state == GRPC_CHANNEL_CONNECTING);
+
+  /* quickly followed by a transition to TRANSIENT_FAILURE */
+  grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_CONNECTING,
+                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        f.cq, tag(3));
+  cq_expect_completion(cqv, tag(3), 1);
+  cq_verify(cqv);
+  state = grpc_channel_check_connectivity_state(f.client, 0);
+  GPR_ASSERT(state == GRPC_CHANNEL_TRANSIENT_FAILURE ||
+             state == GRPC_CHANNEL_CONNECTING);
+
+  gpr_log(GPR_DEBUG, "*** STARTING SERVER ***");
+
+  /* now let's bring up a server to connect to */
+  config.init_server(&f, NULL);
+
+  gpr_log(GPR_DEBUG, "*** STARTED SERVER ***");
+
+  /* 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(
+        f.client, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), f.cq, tag(4));
+    cq_expect_completion(cqv, tag(4), 1);
+    cq_verify(cqv);
+    state = grpc_channel_check_connectivity_state(f.client, 0);
+    GPR_ASSERT(state == GRPC_CHANNEL_READY ||
+               state == GRPC_CHANNEL_CONNECTING ||
+               state == GRPC_CHANNEL_TRANSIENT_FAILURE);
+  }
+
+  /* bring down the server again */
+  /* we should go immediately to TRANSIENT_FAILURE */
+  gpr_log(GPR_DEBUG, "*** SHUTTING DOWN SERVER ***");
+
+  grpc_channel_watch_connectivity_state(f.client, GRPC_CHANNEL_READY,
+                                        GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                        f.cq, tag(5));
+
+  grpc_server_shutdown_and_notify(f.server, f.cq, tag(0xdead));
+
+  cq_expect_completion(cqv, tag(5), 1);
+  cq_expect_completion(cqv, tag(0xdead), 1);
+  cq_verify(cqv);
+  state = grpc_channel_check_connectivity_state(f.client, 0);
+  GPR_ASSERT(state == GRPC_CHANNEL_TRANSIENT_FAILURE ||
+             state == GRPC_CHANNEL_CONNECTING || state == GRPC_CHANNEL_IDLE);
+
+  /* cleanup server */
+  grpc_server_destroy(f.server);
+
+  gpr_log(GPR_DEBUG, "*** SHUTDOWN SERVER ***");
+
+  grpc_channel_destroy(f.client);
+  grpc_completion_queue_shutdown(f.cq);
+  grpc_completion_queue_destroy(f.cq);
+  config.tear_down_data(&f);
+
+  cq_verifier_destroy(cqv);
+}
+
+void connectivity(grpc_end2end_test_config config) {
+  GPR_ASSERT(config.feature_mask & FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION);
+  test_connectivity(config);
+}