From 53af23cfbf3b1fd4579ec084dbcb7b89a7ae2e96 Mon Sep 17 00:00:00 2001 From: David Garcia Quintas Date: Sat, 15 Apr 2017 10:29:46 -0700 Subject: Improvements to Fake Resolver --- .../client_channel/resolvers/fake_resolver_test.c | 187 +++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 test/core/client_channel/resolvers/fake_resolver_test.c (limited to 'test/core/client_channel/resolvers/fake_resolver_test.c') diff --git a/test/core/client_channel/resolvers/fake_resolver_test.c b/test/core/client_channel/resolvers/fake_resolver_test.c new file mode 100644 index 0000000000..861918fbd6 --- /dev/null +++ b/test/core/client_channel/resolvers/fake_resolver_test.c @@ -0,0 +1,187 @@ +/* + * + * Copyright 2017, 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 + +#include +#include +#include + +#include "src/core/ext/filters/client_channel/lb_policy_factory.h" +#include "src/core/ext/filters/client_channel/parse_address.h" +#include "src/core/ext/filters/client_channel/resolver_registry.h" +#include "src/core/lib/channel/channel_args.h" +#include "src/core/lib/iomgr/combiner.h" +#include "src/core/lib/security/credentials/fake/fake_credentials.h" + +#include "test/core/end2end/fake_resolver.h" +#include "test/core/util/test_config.h" + +static grpc_resolver *build_fake_resolver( + grpc_exec_ctx *exec_ctx, grpc_combiner *combiner, + grpc_fake_resolver_response_generator *response_generator) { + grpc_resolver_factory *factory = grpc_resolver_factory_lookup("test"); + grpc_arg generator_arg = + grpc_fake_resolver_response_generator_arg(response_generator); + grpc_resolver_args args; + memset(&args, 0, sizeof(args)); + grpc_channel_args channel_args = {1, &generator_arg}; + args.args = &channel_args; + args.combiner = combiner; + grpc_resolver *resolver = + grpc_resolver_factory_create_resolver(exec_ctx, factory, &args); + grpc_resolver_factory_unref(factory); + return resolver; +} + +typedef struct on_resolution_arg { + grpc_channel_args *resolver_result; + grpc_channel_args *expected_resolver_result; + bool was_called; +} on_resolution_arg; + +void on_resolution_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { + on_resolution_arg *res = arg; + res->was_called = true; + // We only check the addresses channel arg because that's the only one + // explicitly set by the test via + // grpc_fake_resolver_response_generator_set_response. + const grpc_lb_addresses *actual_lb_addresses = + grpc_lb_addresses_find_channel_arg(res->resolver_result); + const grpc_lb_addresses *expected_lb_addresses = + grpc_lb_addresses_find_channel_arg(res->expected_resolver_result); + GPR_ASSERT( + grpc_lb_addresses_cmp(actual_lb_addresses, expected_lb_addresses) == 0); + grpc_channel_args_destroy(exec_ctx, res->resolver_result); + grpc_channel_args_destroy(exec_ctx, res->expected_resolver_result); +} + +static void test_fake_resolver() { + grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; + grpc_combiner *combiner = grpc_combiner_create(NULL); + // Create resolver. + grpc_fake_resolver_response_generator *response_generator = + grpc_fake_resolver_response_generator_create(); + grpc_resolver *resolver = + build_fake_resolver(&exec_ctx, combiner, response_generator); + GPR_ASSERT(resolver != NULL); + + // Setup expectations. + grpc_uri *uris[] = {grpc_uri_parse(&exec_ctx, "ipv4:10.2.1.1:1234", true), + grpc_uri_parse(&exec_ctx, "ipv4:127.0.0.1:4321", true)}; + char *balancer_names[] = {"name1", "name2"}; + const bool is_balancer[] = {true, false}; + grpc_lb_addresses *addresses = grpc_lb_addresses_create(3, NULL); + for (size_t i = 0; i < GPR_ARRAY_SIZE(uris); ++i) { + grpc_lb_addresses_set_address_from_uri( + addresses, i, uris[i], is_balancer[i], balancer_names[i], NULL); + grpc_uri_destroy(uris[i]); + } + const grpc_arg addresses_arg = + grpc_lb_addresses_create_channel_arg(addresses); + grpc_channel_args *results = + grpc_channel_args_copy_and_add(NULL, &addresses_arg, 1); + grpc_lb_addresses_destroy(&exec_ctx, addresses); + on_resolution_arg on_res_arg; + memset(&on_res_arg, 0, sizeof(on_res_arg)); + on_res_arg.expected_resolver_result = results; + grpc_closure *on_resolution = grpc_closure_create( + on_resolution_cb, &on_res_arg, grpc_combiner_scheduler(combiner, false)); + + // Set resolver results and trigger first resolution. on_resolution_cb + // performs the checks. + grpc_fake_resolver_response_generator_set_response( + &exec_ctx, response_generator, results); + grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result, + on_resolution); + grpc_exec_ctx_flush(&exec_ctx); + GPR_ASSERT(on_res_arg.was_called); + + // Setup update. + grpc_uri *uris_update[] = { + grpc_uri_parse(&exec_ctx, "ipv4:192.168.1.0:31416", true)}; + char *balancer_names_update[] = {"name3"}; + const bool is_balancer_update[] = {false}; + grpc_lb_addresses *addresses_update = grpc_lb_addresses_create(1, NULL); + for (size_t i = 0; i < GPR_ARRAY_SIZE(uris_update); ++i) { + grpc_lb_addresses_set_address_from_uri(addresses_update, i, uris_update[i], + is_balancer_update[i], + balancer_names_update[i], NULL); + grpc_uri_destroy(uris_update[i]); + } + + grpc_arg addresses_update_arg = + grpc_lb_addresses_create_channel_arg(addresses_update); + grpc_channel_args *results_update = + grpc_channel_args_copy_and_add(NULL, &addresses_update_arg, 1); + grpc_lb_addresses_destroy(&exec_ctx, addresses_update); + + // Setup expectations for the update. + on_resolution_arg on_res_arg_update; + memset(&on_res_arg_update, 0, sizeof(on_res_arg_update)); + on_res_arg_update.expected_resolver_result = results_update; + on_resolution = grpc_closure_create(on_resolution_cb, &on_res_arg_update, + grpc_combiner_scheduler(combiner, false)); + + // Set updated resolver results and trigger a second resolution. + grpc_fake_resolver_response_generator_set_response( + &exec_ctx, response_generator, results_update); + grpc_resolver_next_locked(&exec_ctx, resolver, + &on_res_arg_update.resolver_result, on_resolution); + grpc_exec_ctx_flush(&exec_ctx); + GPR_ASSERT(on_res_arg.was_called); + + // Requesting a new resolution without re-senting the response shouldn't + // trigger the resolution callback. + memset(&on_res_arg, 0, sizeof(on_res_arg)); + grpc_resolver_next_locked(&exec_ctx, resolver, &on_res_arg.resolver_result, + on_resolution); + grpc_exec_ctx_flush(&exec_ctx); + GPR_ASSERT(!on_res_arg.was_called); + + GRPC_COMBINER_UNREF(&exec_ctx, combiner, "test_fake_resolver"); + GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_fake_resolver"); + grpc_exec_ctx_finish(&exec_ctx); + grpc_fake_resolver_response_generator_unref(response_generator); +} + +int main(int argc, char **argv) { + grpc_test_init(argc, argv); + grpc_fake_resolver_init(); // Registers the "test" scheme. + grpc_init(); + + test_fake_resolver(); + + grpc_shutdown(); + return 0; +} -- cgit v1.2.3