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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/reporting/reporting_endpoint_manager.h"
#include <string>
#include "base/test/simple_test_tick_clock.h"
#include "base/time/time.h"
#include "net/base/backoff_entry.h"
#include "net/reporting/reporting_cache.h"
#include "net/reporting/reporting_client.h"
#include "net/reporting/reporting_policy.h"
#include "net/reporting/reporting_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
#include "url/origin.h"
namespace net {
namespace {
class ReportingEndpointManagerTest : public ReportingTestBase {
public:
ReportingEndpointManagerTest() {
ReportingPolicy policy;
policy.endpoint_backoff_policy.num_errors_to_ignore = 0;
policy.endpoint_backoff_policy.initial_delay_ms = 60000;
policy.endpoint_backoff_policy.multiply_factor = 2.0;
policy.endpoint_backoff_policy.jitter_factor = 0.0;
policy.endpoint_backoff_policy.maximum_backoff_ms = -1;
policy.endpoint_backoff_policy.entry_lifetime_ms = 0;
policy.endpoint_backoff_policy.always_use_initial_delay = false;
UsePolicy(policy);
}
protected:
void SetClient(const GURL& endpoint, int priority, int weight) {
cache()->SetClient(kOrigin_, endpoint, ReportingClient::Subdomains::EXCLUDE,
kGroup_, tomorrow(), priority, weight);
}
const url::Origin kOrigin_ = url::Origin::Create(GURL("https://origin/"));
const GURL kEndpoint_ = GURL("https://endpoint/");
const std::string kGroup_ = "group";
};
TEST_F(ReportingEndpointManagerTest, NoEndpoint) {
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
}
TEST_F(ReportingEndpointManagerTest, Endpoint) {
SetClient(kEndpoint_, ReportingClient::kDefaultPriority,
ReportingClient::kDefaultWeight);
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kEndpoint_, client->endpoint);
}
TEST_F(ReportingEndpointManagerTest, ExpiredEndpoint) {
SetClient(kEndpoint_, ReportingClient::kDefaultPriority,
ReportingClient::kDefaultWeight);
// Default expiration is "tomorrow", so make sure we're past that.
tick_clock()->Advance(base::TimeDelta::FromDays(2));
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
}
TEST_F(ReportingEndpointManagerTest, BackedOffEndpoint) {
ASSERT_EQ(2.0, policy().endpoint_backoff_policy.multiply_factor);
base::TimeDelta initial_delay = base::TimeDelta::FromMilliseconds(
policy().endpoint_backoff_policy.initial_delay_ms);
SetClient(kEndpoint_, ReportingClient::kDefaultPriority,
ReportingClient::kDefaultWeight);
endpoint_manager()->InformOfEndpointRequest(kEndpoint_, false);
// After one failure, endpoint is in exponential backoff.
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
// After initial delay, endpoint is usable again.
tick_clock()->Advance(initial_delay);
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kEndpoint_, client->endpoint);
endpoint_manager()->InformOfEndpointRequest(kEndpoint_, false);
// After a second failure, endpoint is backed off again.
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
tick_clock()->Advance(initial_delay);
// Next backoff is longer -- 2x the first -- so endpoint isn't usable yet.
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
tick_clock()->Advance(initial_delay);
// After 2x the initial delay, the endpoint is usable again.
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kEndpoint_, client->endpoint);
endpoint_manager()->InformOfEndpointRequest(kEndpoint_, true);
endpoint_manager()->InformOfEndpointRequest(kEndpoint_, true);
// Two more successful requests should reset the backoff to the initial delay
// again.
endpoint_manager()->InformOfEndpointRequest(kEndpoint_, false);
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client == nullptr);
tick_clock()->Advance(initial_delay);
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
EXPECT_TRUE(client != nullptr);
}
// Make sure that multiple endpoints will all be returned at some point, to
// avoid accidentally or intentionally implementing any priority ordering.
TEST_F(ReportingEndpointManagerTest, RandomEndpoint) {
static const GURL kEndpoint1("https://endpoint1/");
static const GURL kEndpoint2("https://endpoint2/");
static const int kMaxAttempts = 20;
SetClient(kEndpoint1, ReportingClient::kDefaultPriority,
ReportingClient::kDefaultWeight);
SetClient(kEndpoint2, ReportingClient::kDefaultPriority,
ReportingClient::kDefaultWeight);
bool endpoint1_seen = false;
bool endpoint2_seen = false;
for (int i = 0; i < kMaxAttempts; ++i) {
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
ASSERT_TRUE(client->endpoint == kEndpoint1 ||
client->endpoint == kEndpoint2);
if (client->endpoint == kEndpoint1)
endpoint1_seen = true;
else if (client->endpoint == kEndpoint2)
endpoint2_seen = true;
if (endpoint1_seen && endpoint2_seen)
break;
}
EXPECT_TRUE(endpoint1_seen);
EXPECT_TRUE(endpoint2_seen);
}
TEST_F(ReportingEndpointManagerTest, Priority) {
static const GURL kPrimaryEndpoint("https://endpoint1/");
static const GURL kBackupEndpoint("https://endpoint2/");
SetClient(kPrimaryEndpoint, 10, ReportingClient::kDefaultWeight);
SetClient(kBackupEndpoint, 20, ReportingClient::kDefaultWeight);
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kPrimaryEndpoint, client->endpoint);
// The backoff policy we set up in the constructor means that a single failed
// upload will take the primary endpoint out of contention. This should cause
// us to choose the backend endpoint.
endpoint_manager()->InformOfEndpointRequest(kPrimaryEndpoint, false);
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kBackupEndpoint, client->endpoint);
// Advance the current time far enough to clear out the primary endpoint's
// backoff clock. This should bring the primary endpoint back into play.
tick_clock()->Advance(base::TimeDelta::FromMinutes(2));
client = endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
EXPECT_EQ(kPrimaryEndpoint, client->endpoint);
}
// Note: This test depends on the deterministic mock RandIntCallback set up in
// TestReportingContext, which returns consecutive integers starting at 0
// (modulo the requested range, plus the requested minimum).
TEST_F(ReportingEndpointManagerTest, Weight) {
static const GURL kEndpoint1("https://endpoint1/");
static const GURL kEndpoint2("https://endpoint2/");
static const int kEndpoint1Weight = 5;
static const int kEndpoint2Weight = 2;
static const int kTotalEndpointWeight = kEndpoint1Weight + kEndpoint2Weight;
SetClient(kEndpoint1, ReportingClient::kDefaultPriority, kEndpoint1Weight);
SetClient(kEndpoint2, ReportingClient::kDefaultPriority, kEndpoint2Weight);
int endpoint1_count = 0;
int endpoint2_count = 0;
for (int i = 0; i < kTotalEndpointWeight; ++i) {
const ReportingClient* client =
endpoint_manager()->FindClientForOriginAndGroup(kOrigin_, kGroup_);
ASSERT_TRUE(client != nullptr);
ASSERT_TRUE(client->endpoint == kEndpoint1 ||
client->endpoint == kEndpoint2);
if (client->endpoint == kEndpoint1)
++endpoint1_count;
else if (client->endpoint == kEndpoint2)
++endpoint2_count;
}
EXPECT_EQ(kEndpoint1Weight, endpoint1_count);
EXPECT_EQ(kEndpoint2Weight, endpoint2_count);
}
} // namespace
} // namespace net
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