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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 "remoting/host/zombie_host_detector.h"
#include "base/functional/callback_helpers.h"
#include "base/test/bind.h"
#include "base/test/mock_callback.h"
#include "base/test/task_environment.h"
#include "net/base/mock_network_change_notifier.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
// Extra time to fast forward to make sure the task gets run.
static constexpr base::TimeDelta kFastForwardDelta = base::Seconds(1);
} // namespace
namespace remoting {
class ZombieHostDetectorTest : public testing::Test {
public:
ZombieHostDetectorTest() {
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_ETHERNET);
zombie_host_detector_.Start();
}
protected:
void FastForwardUntilZombieStateDetected(
base::TimeDelta fast_forward_interval,
const base::RepeatingClosure& on_fast_forward) {
bool zombie_state_detected = false;
EXPECT_CALL(mock_on_zombie_state_detected_, Run()).WillOnce([&]() {
zombie_state_detected = true;
});
while (!zombie_state_detected) {
task_environment_.FastForwardBy(fast_forward_interval);
on_fast_forward.Run();
}
}
base::TimeDelta GetNextDetectionDurationSinceNow() const {
return zombie_host_detector_.GetNextDetectionTime() -
base::TimeTicks::Now();
}
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
std::unique_ptr<net::test::MockNetworkChangeNotifier>
network_change_notifier_{net::test::MockNetworkChangeNotifier::Create()};
base::MockCallback<base::OnceClosure> mock_on_zombie_state_detected_;
ZombieHostDetector zombie_host_detector_{
mock_on_zombie_state_detected_.Get()};
};
TEST_F(ZombieHostDetectorTest, NoEvent_Noop) {
task_environment_.FastForwardBy(base::Hours(1));
}
TEST_F(ZombieHostDetectorTest, AllEventsAreCurrent_Noop) {
// Fast forward to 5s before detection.
task_environment_.FastForwardBy(GetNextDetectionDurationSinceNow() -
base::Seconds(5));
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
task_environment_.FastForwardBy(base::Seconds(6));
}
TEST_F(ZombieHostDetectorTest, HeartbeatNotCurrent_CallbackCalled) {
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
// Only report signaling active but not heartbeat.
FastForwardUntilZombieStateDetected(
ZombieHostDetector::kMaxSignalingActiveInterval - kFastForwardDelta,
base::BindLambdaForTesting(
[&]() { zombie_host_detector_.OnSignalingActive(); }));
}
TEST_F(ZombieHostDetectorTest, SignalingNotCurrent_CallbackCalled) {
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
// Only report heartbeat but not signaling active.
FastForwardUntilZombieStateDetected(
ZombieHostDetector::kMaxHeartbeatInterval - kFastForwardDelta,
base::BindLambdaForTesting(
[&]() { zombie_host_detector_.OnHeartbeatSent(); }));
}
TEST_F(ZombieHostDetectorTest, NeitherIsCurrent_CallbackCalled) {
EXPECT_CALL(mock_on_zombie_state_detected_, Run()).Times(1);
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
task_environment_.FastForwardBy(base::Hours(1));
}
TEST_F(ZombieHostDetectorTest, NeitherIsCurrentWhileNoConnection_Noop) {
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_NONE);
task_environment_.FastForwardBy(base::Hours(1));
}
TEST_F(ZombieHostDetectorTest, NoEventAfterComingBackOnline_Noop) {
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_NONE);
task_environment_.FastForwardBy(base::Hours(1));
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_ETHERNET);
task_environment_.FastForwardBy(GetNextDetectionDurationSinceNow() +
kFastForwardDelta);
task_environment_.FastForwardBy(base::Hours(1));
}
TEST_F(ZombieHostDetectorTest, NeitherIsCurrentWhenJustComeBackOnline_Noop) {
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_NONE);
task_environment_.FastForwardBy(base::Hours(1));
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_ETHERNET);
task_environment_.FastForwardBy(GetNextDetectionDurationSinceNow() +
kFastForwardDelta);
}
TEST_F(ZombieHostDetectorTest, NotCurrentAfterComingBackOnline_CallbackCalled) {
zombie_host_detector_.OnHeartbeatSent();
zombie_host_detector_.OnSignalingActive();
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_NONE);
task_environment_.FastForwardBy(base::Hours(1));
network_change_notifier_->SetConnectionType(
net::NetworkChangeNotifier::CONNECTION_ETHERNET);
task_environment_.FastForwardBy(GetNextDetectionDurationSinceNow() +
kFastForwardDelta);
FastForwardUntilZombieStateDetected(
ZombieHostDetector::kMaxHeartbeatInterval - kFastForwardDelta,
base::DoNothing()); // Not reporting any event.
}
} // namespace remoting
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