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// Copyright 2022 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/ash/app_mode/metrics/low_disk_metrics_service.h"
#include "base/check_deref.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/scoped_testing_local_state.h"
#include "chrome/test/base/testing_browser_process.h"
#include "chromeos/ash/components/dbus/userdataauth/fake_userdataauth_client.h"
#include "chromeos/ash/components/dbus/userdataauth/userdataauth_client.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash {
class LowDiskMetricsServiceTest
: public testing::TestWithParam<
std::tuple<KioskLowDiskSeverity, uint64_t>> {
public:
LowDiskMetricsServiceTest()
: local_state_(std::make_unique<ScopedTestingLocalState>(
TestingBrowserProcess::GetGlobal())) {
UserDataAuthClient::InitializeFake();
}
LowDiskMetricsServiceTest(const LowDiskMetricsServiceTest&) = delete;
LowDiskMetricsServiceTest& operator=(const LowDiskMetricsServiceTest&) =
delete;
KioskLowDiskSeverity severity() const { return std::get<0>(GetParam()); }
uint64_t disk_free_bytes() const { return std::get<1>(GetParam()); }
TestingPrefServiceSimple* local_state() { return local_state_->Get(); }
void SetUp() override {
histogram_tester_ = std::make_unique<base::HistogramTester>();
}
void TearDown() override {
local_state()->RemoveUserPref(prefs::kKioskMetrics);
}
base::HistogramTester* histogram_tester() { return histogram_tester_.get(); }
std::optional<KioskLowDiskSeverity> GetLowDiskSeverityFromLocalState() {
const auto& metrics_dict = local_state()->GetDict(prefs::kKioskMetrics);
const auto severity_value = metrics_dict.FindInt(kKioskLowDiskSeverity);
if (!severity_value) {
return std::nullopt;
}
return static_cast<KioskLowDiskSeverity>(severity_value.value());
}
void SendLowDiskSpaceEvent(uint64_t disk_free_bytes) {
FakeUserDataAuthClient::Get()->NotifyLowDiskSpace(disk_free_bytes);
task_environment_.RunUntilIdle();
}
private:
base::test::SingleThreadTaskEnvironment task_environment_;
std::unique_ptr<base::HistogramTester> histogram_tester_;
std::unique_ptr<ScopedTestingLocalState> local_state_;
};
TEST_P(LowDiskMetricsServiceTest, Severity) {
auto service =
std::make_unique<LowDiskMetricsService>(CHECK_DEREF(local_state()));
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
0);
histogram_tester()->ExpectTotalCount(
kKioskSessionLowDiskHighestSeverityHistogram, 0);
SendLowDiskSpaceEvent(disk_free_bytes());
histogram_tester()->ExpectBucketCount(kKioskSessionLowDiskSeverityHistogram,
severity(), 1);
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
1);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(), severity());
service = std::make_unique<LowDiskMetricsService>(CHECK_DEREF(local_state()));
histogram_tester()->ExpectBucketCount(
kKioskSessionLowDiskHighestSeverityHistogram, severity(), 1);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(),
KioskLowDiskSeverity::kNone);
}
TEST_F(LowDiskMetricsServiceTest, Update) {
auto service =
std::make_unique<LowDiskMetricsService>(CHECK_DEREF(local_state()));
SendLowDiskSpaceEvent(kLowDiskMediumThreshold + 1);
histogram_tester()->ExpectBucketCount(kKioskSessionLowDiskSeverityHistogram,
KioskLowDiskSeverity::kNone, 1);
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
1);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(),
KioskLowDiskSeverity::kNone);
// Update to higher severity.
SendLowDiskSpaceEvent(kLowDiskMediumThreshold - 1);
histogram_tester()->ExpectBucketCount(kKioskSessionLowDiskSeverityHistogram,
KioskLowDiskSeverity::kMedium, 1);
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
2);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(),
KioskLowDiskSeverity::kMedium);
// Update to higher severity.
SendLowDiskSpaceEvent(kLowDiskSevereThreshold - 1);
histogram_tester()->ExpectBucketCount(kKioskSessionLowDiskSeverityHistogram,
KioskLowDiskSeverity::kHigh, 1);
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
3);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(),
KioskLowDiskSeverity::kHigh);
// Do not update to higher severity.
SendLowDiskSpaceEvent(kLowDiskSevereThreshold + 1);
histogram_tester()->ExpectBucketCount(kKioskSessionLowDiskSeverityHistogram,
KioskLowDiskSeverity::kMedium, 2);
histogram_tester()->ExpectTotalCount(kKioskSessionLowDiskSeverityHistogram,
4);
EXPECT_EQ(GetLowDiskSeverityFromLocalState().value(),
KioskLowDiskSeverity::kHigh);
}
INSTANTIATE_TEST_SUITE_P(
LowDiskMetricsServiceTest,
LowDiskMetricsServiceTest,
testing::Values(
std::tuple(KioskLowDiskSeverity::kNone, kLowDiskMediumThreshold + 1),
std::tuple(KioskLowDiskSeverity::kMedium, kLowDiskMediumThreshold - 1),
std::tuple(KioskLowDiskSeverity::kHigh, kLowDiskSevereThreshold - 1)));
} // namespace ash
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