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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/phonehub/connection_scheduler_impl.h"
#include <memory>
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "chromeos/ash/components/phonehub/fake_feature_status_provider.h"
#include "chromeos/ash/components/phonehub/feature_status.h"
#include "chromeos/ash/components/phonehub/phone_hub_structured_metrics_logger.h"
#include "chromeos/ash/services/secure_channel/public/cpp/client/fake_connection_manager.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash::phonehub {
class ConnectionSchedulerImplTest : public testing::Test {
protected:
ConnectionSchedulerImplTest() = default;
ConnectionSchedulerImplTest(const ConnectionSchedulerImplTest&) = delete;
ConnectionSchedulerImplTest& operator=(const ConnectionSchedulerImplTest&) =
delete;
~ConnectionSchedulerImplTest() override = default;
void SetUp() override {
PhoneHubStructuredMetricsLogger::RegisterPrefs(pref_service_.registry());
phone_hub_structured_metrics_logger_ =
std::make_unique<PhoneHubStructuredMetricsLogger>(&pref_service_);
fake_connection_manager_ =
std::make_unique<secure_channel::FakeConnectionManager>();
fake_feature_status_provider_ =
std::make_unique<FakeFeatureStatusProvider>();
}
void CreateConnectionScheduler() {
connection_scheduler_ = std::make_unique<ConnectionSchedulerImpl>(
fake_connection_manager_.get(), fake_feature_status_provider_.get(),
phone_hub_structured_metrics_logger_.get());
}
base::TimeDelta GetCurrentBackoffDelay() {
return connection_scheduler_->GetCurrentBackoffDelayTimeForTesting();
}
int GetBackoffFailureCount() {
return connection_scheduler_->GetBackoffFailureCountForTesting();
}
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
std::unique_ptr<secure_channel::FakeConnectionManager>
fake_connection_manager_;
std::unique_ptr<FakeFeatureStatusProvider> fake_feature_status_provider_;
std::unique_ptr<PhoneHubStructuredMetricsLogger>
phone_hub_structured_metrics_logger_;
std::unique_ptr<ConnectionSchedulerImpl> connection_scheduler_;
TestingPrefServiceSimple pref_service_;
};
TEST_F(ConnectionSchedulerImplTest, SuccesssfullyAttemptConnection) {
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
CreateConnectionScheduler();
connection_scheduler_->ScheduleConnectionNow(
DiscoveryEntryPoint::kUserSignIn);
// Verify that the ConnectionManager has attempted to connect.
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Simulate state changes with AttemptConnection().
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(FeatureStatus::kEnabledAndConnected);
// Verify only 1 call to AttemptConnection() was ever made.
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Verify that we did not attempt a backoff retry.
EXPECT_EQ(0, GetBackoffFailureCount());
}
TEST_F(ConnectionSchedulerImplTest, FeatureDisabledDoesNotEstablishConnection) {
fake_feature_status_provider_->SetStatus(FeatureStatus::kDisabled);
CreateConnectionScheduler();
connection_scheduler_->ScheduleConnectionNow(
DiscoveryEntryPoint::kUserSignIn);
// Verify that the ConnectionManager did not attempt connection.
EXPECT_EQ(0u, fake_connection_manager_->num_attempt_connection_calls());
// Verify that we did not attempt a backoff retry.
EXPECT_EQ(0, GetBackoffFailureCount());
}
TEST_F(ConnectionSchedulerImplTest, BackoffRetryWithUpdatedConnection) {
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
CreateConnectionScheduler();
connection_scheduler_->ScheduleConnectionNow(
DiscoveryEntryPoint::kUserSignIn);
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Simulate state changes with AttemptConnection().
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
EXPECT_EQ(1, GetBackoffFailureCount());
// Move forward time to the next backoff retry with disconnected status.
task_environment_.FastForwardBy(GetCurrentBackoffDelay());
EXPECT_EQ(2u, fake_connection_manager_->num_attempt_connection_calls());
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
EXPECT_EQ(2, GetBackoffFailureCount());
// Move forward time to the next backoff retry, this time with connected
// status.
task_environment_.FastForwardBy(GetCurrentBackoffDelay());
EXPECT_EQ(3u, fake_connection_manager_->num_attempt_connection_calls());
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(FeatureStatus::kEnabledAndConnected);
// Expected no more backoff failures since connection is now established.
EXPECT_EQ(0, GetBackoffFailureCount());
// Fast forward time and confirm no other retries have been made.
task_environment_.FastForwardBy(base::Seconds(100));
EXPECT_EQ(3u, fake_connection_manager_->num_attempt_connection_calls());
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(FeatureStatus::kEnabledAndConnected,
fake_feature_status_provider_->GetStatus());
}
TEST_F(ConnectionSchedulerImplTest, BackoffRetryWithUpdatedFeatures) {
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
CreateConnectionScheduler();
connection_scheduler_->ScheduleConnectionNow(
DiscoveryEntryPoint::kUserSignIn);
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Simulate state changes with AttemptConnection().
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
EXPECT_EQ(1, GetBackoffFailureCount());
// Simulate the feature status switched to disabled.
fake_feature_status_provider_->SetStatus(FeatureStatus::kDisabled);
// Expect the backoff to reset and never attempt to kickoff another
// connection.
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Expect that connection has been disconnected.
EXPECT_EQ(1u, fake_connection_manager_->num_disconnect_calls());
// Fast forward time and confirm no other retries have been made.
task_environment_.FastForwardBy(base::Seconds(100));
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
// Simulate the feature re-enabled and the connection kickoff should start.
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
// The next ScheduleConnection() was not caused by a previous failure, expect
// backoff failure count to not increase.
EXPECT_EQ(0, GetBackoffFailureCount());
// Move forward in time and confirm backoff attempted another retry.
task_environment_.FastForwardBy(GetCurrentBackoffDelay());
EXPECT_EQ(2u, fake_connection_manager_->num_attempt_connection_calls());
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledAndConnecting);
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
// The next ScheduleConnection() was caused by a previous failure, expect 1
// failure count.
EXPECT_EQ(1, GetBackoffFailureCount());
}
TEST_F(ConnectionSchedulerImplTest, ScheduleConnectionSuspended) {
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
CreateConnectionScheduler();
// Simulate screen locked and expect no scheduled connections.
fake_feature_status_provider_->SetStatus(FeatureStatus::kLockOrSuspended);
// Expect no scheduled connections on screen lock.
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(0u, fake_connection_manager_->num_attempt_connection_calls());
EXPECT_EQ(1u, fake_connection_manager_->num_disconnect_calls());
// Simulate screen unlocked and expect a scheduled connection.
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
}
TEST_F(ConnectionSchedulerImplTest, HostsNotEligible) {
// Simulate no eligible hosts available. Expect no scheduled connections.
fake_feature_status_provider_->SetStatus(
FeatureStatus::kNotEligibleForFeature);
CreateConnectionScheduler();
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(0u, fake_connection_manager_->num_attempt_connection_calls());
fake_feature_status_provider_->SetStatus(
FeatureStatus::kEnabledButDisconnected);
// Flip to have eligble hosts available. Expect a scheduled connection.
EXPECT_EQ(0, GetBackoffFailureCount());
EXPECT_EQ(1u, fake_connection_manager_->num_attempt_connection_calls());
}
} // namespace ash::phonehub
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