Chiebot-Mirror
/
grpc
mirror of https://github.com/grpc/grpc.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

Fix dns_resolver_cooldown_test and fake_resolver_test.

Browse Source
reviewable/pr16342/r4
Mark D. Roth 6 years ago
parent f6dea9ec6a
commit 1a10a9b9bf
2 changed files with 48 additions and 124 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 114
      test/core/client_channel/resolvers/dns_resolver_cooldown_test.cc
  2. 58
      test/core/client_channel/resolvers/fake_resolver_test.cc

114
test/core/client_channel/resolvers/dns_resolver_cooldown_test.cc
Unescape View File

@ -28,12 +28,14 @@
#include "src/core/lib/iomgr/sockaddr_utils.h"
#include "test/core/util/test_config.h"
constexpr int kMinResolutionPeriodMs = 1000;
extern grpc_address_resolver_vtable* grpc_resolve_address_impl;
static grpc_address_resolver_vtable* default_resolve_address;
static grpc_combiner* g_combiner;
grpc_ares_request* (*g_default_dns_lookup_ares_locked)(
static grpc_ares_request* (*g_default_dns_lookup_ares_locked)(
const char* dns_server, const char* name, const char* default_port,
grpc_pollset_set* interested_parties, grpc_closure* on_done,
grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json,
@ -43,7 +45,7 @@ grpc_ares_request* (*g_default_dns_lookup_ares_locked)(
// times a system-level resolution has happened.
static int g_resolution_count;
struct iomgr_args {
static struct iomgr_args {
gpr_event ev;
gpr_atm done_atm;
gpr_mu* mu;
@ -61,6 +63,16 @@ static void test_resolve_address_impl(const char* name,
default_resolve_address->resolve_address(
name, default_port, g_iomgr_args.pollset_set, on_done, addrs);
++g_resolution_count;
static grpc_millis last_resolution_time = 0;
if (last_resolution_time == 0) {
last_resolution_time =
grpc_timespec_to_millis_round_up(gpr_now(GPR_CLOCK_MONOTONIC));
} else {
grpc_millis now =
grpc_timespec_to_millis_round_up(gpr_now(GPR_CLOCK_MONOTONIC));
GPR_ASSERT(now - last_resolution_time >= kMinResolutionPeriodMs);
last_resolution_time = now;
}
}
static grpc_error* test_blocking_resolve_address_impl(
@ -73,7 +85,7 @@ static grpc_error* test_blocking_resolve_address_impl(
static grpc_address_resolver_vtable test_resolver = {
test_resolve_address_impl, test_blocking_resolve_address_impl};
grpc_ares_request* test_dns_lookup_ares_locked(
static grpc_ares_request* test_dns_lookup_ares_locked(
const char* dns_server, const char* name, const char* default_port,
grpc_pollset_set* interested_parties, grpc_closure* on_done,
grpc_lb_addresses** addrs, bool check_grpclb, char** service_config_json,
@ -82,6 +94,15 @@ grpc_ares_request* test_dns_lookup_ares_locked(
dns_server, name, default_port, g_iomgr_args.pollset_set, on_done, addrs,
check_grpclb, service_config_json, combiner);
++g_resolution_count;
static grpc_millis last_resolution_time = 0;
if (last_resolution_time == 0) {
grpc_timespec_to_millis_round_up(gpr_now(GPR_CLOCK_MONOTONIC));
} else {
grpc_millis now =
grpc_timespec_to_millis_round_up(gpr_now(GPR_CLOCK_MONOTONIC));
GPR_ASSERT(now - last_resolution_time >= kMinResolutionPeriodMs);
last_resolution_time = now;
}
return result;
}
@ -91,7 +112,7 @@ static gpr_timespec test_deadline(void) {
static void do_nothing(void* arg, grpc_error* error) {}
void iomgr_args_init(iomgr_args* args) {
static void iomgr_args_init(iomgr_args* args) {
gpr_event_init(&args->ev);
args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
grpc_pollset_init(args->pollset, &args->mu);
@ -100,7 +121,7 @@ void iomgr_args_init(iomgr_args* args) {
gpr_atm_rel_store(&args->done_atm, 0);
}
void iomgr_args_finish(iomgr_args* args) {
static void iomgr_args_finish(iomgr_args* args) {
GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
grpc_pollset_set_destroy(args->pollset_set);
@ -146,29 +167,19 @@ struct OnResolutionCallbackArg {
const char* uri_str = nullptr;
grpc_core::OrphanablePtr<grpc_core::Resolver> resolver;
grpc_channel_args* result = nullptr;
grpc_millis delay_before_second_resolution = 0;
};
// Counter for the number of times a resolution notification callback has been
// invoked.
static int g_on_resolution_invocations_count;
// Set to true by the last callback in the resolution chain.
bool g_all_callbacks_invoked;
static bool g_all_callbacks_invoked;
void on_fourth_resolution(void* arg, grpc_error* error) {
static void on_second_resolution(void* arg, grpc_error* error) {
OnResolutionCallbackArg* cb_arg = static_cast<OnResolutionCallbackArg*>(arg);
grpc_channel_args_destroy(cb_arg->result);
GPR_ASSERT(error == GRPC_ERROR_NONE);
++g_on_resolution_invocations_count;
gpr_log(GPR_INFO,
"4th: g_on_resolution_invocations_count: %d, g_resolution_count: %d",
g_on_resolution_invocations_count, g_resolution_count);
// In this case we expect to have incurred in another system-level resolution
// because on_third_resolution slept for longer than the min resolution
// period.
GPR_ASSERT(g_on_resolution_invocations_count == 4);
GPR_ASSERT(g_resolution_count == 3);
gpr_log(GPR_INFO, "2nd: g_resolution_count: %d", g_resolution_count);
// The resolution callback was not invoked until new data was
// available, which was delayed until after the cooldown period.
GPR_ASSERT(g_resolution_count == 2);
cb_arg->resolver.reset();
gpr_atm_rel_store(&g_iomgr_args.done_atm, 1);
gpr_mu_lock(g_iomgr_args.mu);
@ -179,67 +190,13 @@ void on_fourth_resolution(void* arg, grpc_error* error) {
g_all_callbacks_invoked = true;
}
void on_third_resolution(void* arg, grpc_error* error) {
OnResolutionCallbackArg* cb_arg = static_cast<OnResolutionCallbackArg*>(arg);
grpc_channel_args_destroy(cb_arg->result);
GPR_ASSERT(error == GRPC_ERROR_NONE);
++g_on_resolution_invocations_count;
gpr_log(GPR_INFO,
"3rd: g_on_resolution_invocations_count: %d, g_resolution_count: %d",
g_on_resolution_invocations_count, g_resolution_count);
// The timer set because of the previous re-resolution request fires, so a new
// system-level resolution happened.
GPR_ASSERT(g_on_resolution_invocations_count == 3);
GPR_ASSERT(g_resolution_count == 2);
grpc_core::ExecCtx::Get()->TestOnlySetNow(
cb_arg->delay_before_second_resolution * 2);
cb_arg->resolver->NextLocked(
&cb_arg->result,
GRPC_CLOSURE_CREATE(on_fourth_resolution, arg,
grpc_combiner_scheduler(g_combiner)));
cb_arg->resolver->RequestReresolutionLocked();
gpr_mu_lock(g_iomgr_args.mu);
GRPC_LOG_IF_ERROR("pollset_kick",
grpc_pollset_kick(g_iomgr_args.pollset, nullptr));
gpr_mu_unlock(g_iomgr_args.mu);
}
void on_second_resolution(void* arg, grpc_error* error) {
static void on_first_resolution(void* arg, grpc_error* error) {
OnResolutionCallbackArg* cb_arg = static_cast<OnResolutionCallbackArg*>(arg);
grpc_channel_args_destroy(cb_arg->result);
GPR_ASSERT(error == GRPC_ERROR_NONE);
++g_on_resolution_invocations_count;
gpr_log(GPR_INFO,
"2nd: g_on_resolution_invocations_count: %d, g_resolution_count: %d",
g_on_resolution_invocations_count, g_resolution_count);
// The resolution request for which this function is the callback happened
// before the min resolution period. Therefore, no new system-level
// resolutions happened, as indicated by g_resolution_count. But a resolution
// timer was set to fire when the cooldown finishes.
GPR_ASSERT(g_on_resolution_invocations_count == 2);
GPR_ASSERT(g_resolution_count == 1);
// Register a new callback to capture the timer firing.
cb_arg->resolver->NextLocked(
&cb_arg->result,
GRPC_CLOSURE_CREATE(on_third_resolution, arg,
grpc_combiner_scheduler(g_combiner)));
gpr_mu_lock(g_iomgr_args.mu);
GRPC_LOG_IF_ERROR("pollset_kick",
grpc_pollset_kick(g_iomgr_args.pollset, nullptr));
gpr_mu_unlock(g_iomgr_args.mu);
}
void on_first_resolution(void* arg, grpc_error* error) {
OnResolutionCallbackArg* cb_arg = static_cast<OnResolutionCallbackArg*>(arg);
grpc_channel_args_destroy(cb_arg->result);
GPR_ASSERT(error == GRPC_ERROR_NONE);
++g_on_resolution_invocations_count;
gpr_log(GPR_INFO,
"1st: g_on_resolution_invocations_count: %d, g_resolution_count: %d",
g_on_resolution_invocations_count, g_resolution_count);
gpr_log(GPR_INFO, "1st: g_resolution_count: %d", g_resolution_count);
// There's one initial system-level resolution and one invocation of a
// notification callback (the current function).
GPR_ASSERT(g_on_resolution_invocations_count == 1);
GPR_ASSERT(g_resolution_count == 1);
cb_arg->resolver->NextLocked(
&cb_arg->result,
@ -265,9 +222,7 @@ static void start_test_under_combiner(void* arg, grpc_error* error) {
grpc_core::ResolverArgs args;
args.uri = uri;
args.combiner = g_combiner;
g_on_resolution_invocations_count = 0;
g_resolution_count = 0;
constexpr int kMinResolutionPeriodMs = 1000;
grpc_arg cooldown_arg;
cooldown_arg.key =
@ -280,7 +235,6 @@ static void start_test_under_combiner(void* arg, grpc_error* error) {
res_cb_arg->resolver = factory->CreateResolver(args);
grpc_channel_args_destroy(cooldown_channel_args);
GPR_ASSERT(res_cb_arg->resolver != nullptr);
res_cb_arg->delay_before_second_resolution = kMinResolutionPeriodMs;
// First resolution, would incur in system-level resolution.
res_cb_arg->resolver->NextLocked(
&res_cb_arg->result,

58
test/core/client_channel/resolvers/fake_resolver_test.cc
Unescape View File

@ -124,8 +124,8 @@ static void test_fake_resolver() {
build_fake_resolver(combiner, response_generator.get());
GPR_ASSERT(resolver.get() != nullptr);
// Test 1: normal resolution.
// next_results != NULL, reresolution_results == NULL, last_used_results ==
// NULL. Expected response is next_results.
// next_results != NULL, reresolution_results == NULL.
// Expected response is next_results.
grpc_channel_args* results = create_new_resolver_result();
on_resolution_arg on_res_arg = create_on_resolution_arg(results);
grpc_closure* on_resolution = GRPC_CLOSURE_CREATE(
@ -137,10 +137,9 @@ static void test_fake_resolver() {
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 2: update resolution.
// next_results != NULL, reresolution_results == NULL, last_used_results !=
// NULL. Expected response is next_results.
// next_results != NULL, reresolution_results == NULL.
// Expected response is next_results.
results = create_new_resolver_result();
grpc_channel_args* last_used_results = grpc_channel_args_copy(results);
on_res_arg = create_on_resolution_arg(results);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg,
grpc_combiner_scheduler(combiner));
@ -150,21 +149,9 @@ static void test_fake_resolver() {
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 3: fallback re-resolution.
// next_results == NULL, reresolution_results == NULL, last_used_results !=
// NULL. Expected response is last_used_results.
on_res_arg = create_on_resolution_arg(last_used_results);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg,
grpc_combiner_scheduler(combiner));
resolver->NextLocked(&on_res_arg.resolver_result, on_resolution);
// Trigger a re-resolution.
resolver->RequestReresolutionLocked();
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 4: normal re-resolution.
// next_results == NULL, reresolution_results != NULL, last_used_results !=
// NULL. Expected response is reresolution_results.
// Test 3: normal re-resolution.
// next_results == NULL, reresolution_results != NULL.
// Expected response is reresolution_results.
grpc_channel_args* reresolution_results = create_new_resolver_result();
on_res_arg =
create_on_resolution_arg(grpc_channel_args_copy(reresolution_results));
@ -180,9 +167,9 @@ static void test_fake_resolver() {
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 5: repeat re-resolution.
// next_results == NULL, reresolution_results != NULL, last_used_results !=
// NULL. Expected response is reresolution_results.
// Test 4: repeat re-resolution.
// next_results == NULL, reresolution_results != NULL.
// Expected response is reresolution_results.
on_res_arg = create_on_resolution_arg(reresolution_results);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg,
grpc_combiner_scheduler(combiner));
@ -192,11 +179,10 @@ static void test_fake_resolver() {
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 6: normal resolution.
// next_results != NULL, reresolution_results != NULL, last_used_results !=
// NULL. Expected response is next_results.
// Test 5: normal resolution.
// next_results != NULL, reresolution_results != NULL.
// Expected response is next_results.
results = create_new_resolver_result();
last_used_results = grpc_channel_args_copy(results);
on_res_arg = create_on_resolution_arg(results);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg,
grpc_combiner_scheduler(combiner));
@ -206,23 +192,7 @@ static void test_fake_resolver() {
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 7: fallback re-resolution.
// next_results == NULL, reresolution_results == NULL, last_used_results !=
// NULL. Expected response is last_used_results.
on_res_arg = create_on_resolution_arg(last_used_results);
on_resolution = GRPC_CLOSURE_CREATE(on_resolution_cb, &on_res_arg,
grpc_combiner_scheduler(combiner));
resolver->NextLocked(&on_res_arg.resolver_result, on_resolution);
// Reset reresolution_results.
response_generator->SetReresolutionResponse(nullptr);
// Flush here to guarantee that reresolution_results has been reset.
grpc_core::ExecCtx::Get()->Flush();
// Trigger a re-resolution.
resolver->RequestReresolutionLocked();
grpc_core::ExecCtx::Get()->Flush();
GPR_ASSERT(gpr_event_wait(&on_res_arg.ev,
grpc_timeout_seconds_to_deadline(5)) != nullptr);
// Test 8: no-op.
// Test 6: no-op.
// Requesting a new resolution without setting the response shouldn't trigger
// the resolution callback.
memset(&on_res_arg, 0, sizeof(on_res_arg));

Write Preview
Loading…
Cancel
Save