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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/dbus_memory_pressure_evaluator_linux.h"
#include <memory>
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/memory/memory_pressure_listener.h"
#include "base/memory/memory_pressure_monitor.h"
#include "base/memory/ptr_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/notreached.h"
#include "base/test/task_environment.h"
#include "base/time/time.h"
#include "dbus/mock_bus.h"
#include "dbus/mock_object_proxy.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::_;
using testing::Return;
namespace {
class MockMemoryPressureVoter : public memory_pressure::MemoryPressureVoter {
public:
MOCK_METHOD2(SetVote,
void(base::MemoryPressureListener::MemoryPressureLevel, bool));
};
} // namespace
class DbusMemoryPressureEvaluatorLinuxTest : public testing::Test {
protected:
static const char* const kLmmService;
static const char* const kLmmInterface;
static const char* const kXdgPortalService;
static const char* const kXdgPortalMemoryMonitorInterface;
const base::TimeDelta kResetVotePeriod =
DbusMemoryPressureEvaluatorLinux::kResetVotePeriod;
void SetUp() override {
mock_bus_ = base::MakeRefCounted<dbus::MockBus>(dbus::Bus::Options());
ON_CALL(*mock_bus_, GetDBusTaskRunner)
.WillByDefault(
Return(task_environment_.GetMainThreadTaskRunner().get()));
SetupProxy(dbus_proxy_, DBUS_SERVICE_DBUS, DBUS_PATH_DBUS);
SetupProxy(lmm_proxy_, kLmmService,
DbusMemoryPressureEvaluatorLinux::kLmmObject);
SetupProxy(portal_proxy_, kXdgPortalService,
DbusMemoryPressureEvaluatorLinux::kXdgPortalObject);
ON_CALL(*dbus_proxy_, DoCallMethod)
.WillByDefault(Invoke(
this, &DbusMemoryPressureEvaluatorLinuxTest::HandleDBusCalls));
auto voter = std::make_unique<MockMemoryPressureVoter>();
mock_voter_ = voter.get();
evaluator_ = base::WrapUnique(new DbusMemoryPressureEvaluatorLinux(
std::move(voter), mock_bus_, mock_bus_));
}
void EmitLowMemoryWarning(uint8_t level) {
dbus::Signal signal(
kLmmInterface,
DbusMemoryPressureEvaluatorLinux::kLowMemoryWarningSignal);
dbus::MessageWriter writer(&signal);
writer.AppendByte(level);
evaluator_->OnLowMemoryWarning(&signal);
}
// Any service name added via this call will be reported as running by any
// HasNameOwner calls the evaluator makes.
void AddRunningService(std::string service) {
running_services_.push_back(std::move(service));
}
void RunServiceChecks() { evaluator()->CheckIfLmmIsAvailable(); }
base::test::SingleThreadTaskEnvironment& task_environment() {
return task_environment_;
}
dbus::MockObjectProxy* lmm_proxy() { return lmm_proxy_.get(); }
dbus::MockObjectProxy* portal_proxy() { return portal_proxy_.get(); }
MockMemoryPressureVoter* mock_voter() { return mock_voter_; }
DbusMemoryPressureEvaluatorLinux* evaluator() { return evaluator_.get(); }
private:
void SetupProxy(scoped_refptr<dbus::MockObjectProxy>& proxy,
const char* service,
const char* object_path_value) {
dbus::ObjectPath object_path(object_path_value);
proxy = base::MakeRefCounted<dbus::MockObjectProxy>(mock_bus_.get(),
service, object_path);
ON_CALL(*mock_bus_, GetObjectProxy(service, object_path))
.WillByDefault(Return(proxy.get()));
}
void HandleDBusCalls(dbus::MethodCall* method_call,
int timeout_ms,
dbus::ObjectProxy::ResponseCallback* response_callback) {
method_call->SetSerial(123);
method_call->SetReplySerial(456);
if (method_call->GetMember() == "NameHasOwner") {
dbus::MessageReader reader(method_call);
std::string service;
CHECK(reader.PopString(&service));
std::unique_ptr<dbus::Response> response =
dbus::Response::FromMethodCall(method_call);
dbus::MessageWriter writer(response.get());
writer.AppendBool(base::Contains(running_services_, service));
std::move(*response_callback).Run(response.get());
} else if (method_call->GetMember() == "ListActivatableNames") {
std::unique_ptr<dbus::Response> response =
dbus::Response::FromMethodCall(method_call);
dbus::MessageWriter writer(response.get());
writer.AppendArrayOfStrings({});
std::move(*response_callback).Run(response.get());
} else {
NOTREACHED() << method_call->GetMember();
}
}
base::test::SingleThreadTaskEnvironment task_environment_{
base::test::TaskEnvironment::MainThreadType::IO,
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
scoped_refptr<dbus::MockBus> mock_bus_;
scoped_refptr<dbus::MockObjectProxy> dbus_proxy_;
scoped_refptr<dbus::MockObjectProxy> lmm_proxy_;
scoped_refptr<dbus::MockObjectProxy> portal_proxy_;
std::unique_ptr<DbusMemoryPressureEvaluatorLinux> evaluator_;
raw_ptr<MockMemoryPressureVoter> mock_voter_ = nullptr;
std::vector<std::string> running_services_;
};
const char* const DbusMemoryPressureEvaluatorLinuxTest::kLmmService =
DbusMemoryPressureEvaluatorLinux::kLmmService;
const char* const DbusMemoryPressureEvaluatorLinuxTest::kLmmInterface =
DbusMemoryPressureEvaluatorLinux::kLmmInterface;
const char* const DbusMemoryPressureEvaluatorLinuxTest::kXdgPortalService =
DbusMemoryPressureEvaluatorLinux::kXdgPortalService;
const char* const
DbusMemoryPressureEvaluatorLinuxTest::kXdgPortalMemoryMonitorInterface =
DbusMemoryPressureEvaluatorLinux::kXdgPortalMemoryMonitorInterface;
TEST_F(DbusMemoryPressureEvaluatorLinuxTest, Basic) {
EXPECT_CALL(
*mock_voter(),
SetVote(base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE, false))
.WillOnce(Return());
EmitLowMemoryWarning(0);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_NONE);
EXPECT_CALL(
*mock_voter(),
SetVote(base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE,
true))
.Times(2)
.WillRepeatedly(Return());
EmitLowMemoryWarning(50);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_MODERATE);
EmitLowMemoryWarning(100);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_MODERATE);
EXPECT_CALL(
*mock_voter(),
SetVote(base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL,
true))
.WillOnce(Return());
EmitLowMemoryWarning(255);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_CRITICAL);
}
TEST_F(DbusMemoryPressureEvaluatorLinuxTest, PeriodicReset) {
// Verify that the level will be reset after the time delta.
EmitLowMemoryWarning(100);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_MODERATE);
EXPECT_CALL(
*mock_voter(),
SetVote(base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE, false))
.WillOnce(Return());
task_environment().FastForwardBy(kResetVotePeriod);
EXPECT_EQ(evaluator()->current_vote(),
base::MemoryPressureMonitor::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_NONE);
// Verify that no reset is sent for already-none levels.
EXPECT_CALL(
*mock_voter(),
SetVote(base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE, false))
.WillOnce(Return());
EmitLowMemoryWarning(0);
task_environment().FastForwardBy(kResetVotePeriod);
}
TEST_F(DbusMemoryPressureEvaluatorLinuxTest, PrefersConnectingToLmm) {
EXPECT_CALL(*lmm_proxy(), DoConnectToSignal(kLmmInterface, _, _, _)).Times(1);
EXPECT_CALL(*portal_proxy(),
DoConnectToSignal(kXdgPortalMemoryMonitorInterface, _, _, _))
.Times(0);
AddRunningService(kLmmService);
AddRunningService(kXdgPortalService);
RunServiceChecks();
}
TEST_F(DbusMemoryPressureEvaluatorLinuxTest, FallsBackToPortal) {
EXPECT_CALL(*lmm_proxy(), DoConnectToSignal(kLmmInterface, _, _, _)).Times(0);
EXPECT_CALL(*portal_proxy(),
DoConnectToSignal(kXdgPortalMemoryMonitorInterface, _, _, _))
.Times(1);
AddRunningService(kXdgPortalService);
RunServiceChecks();
}
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