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// Copyright 2025 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/metrics/class_management_enabled_metrics_provider.h"
#include <optional>
#include "ash/constants/ash_switches.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "chrome/browser/ash/login/existing_user_controller.h"
#include "chrome/browser/ash/login/test/logged_in_user_mixin.h"
#include "chrome/browser/ash/login/users/fake_chrome_user_manager.h"
#include "chrome/browser/ash/login/wizard_controller.h"
#include "chrome/browser/ash/policy/core/device_policy_cros_browser_test.h"
#include "chrome/browser/ash/policy/test_support/embedded_policy_test_server_mixin.h"
#include "chrome/browser/browser_process.h"
#include "chrome/common/chrome_features.h"
#include "chrome/test/base/fake_gaia_mixin.h"
#include "chromeos/ash/components/dbus/session_manager/fake_session_manager_client.h"
#include "components/account_id/account_id.h"
#include "components/metrics/metrics_service.h"
#include "components/policy/core/common/cloud/cloud_policy_constants.h"
#include "components/policy/core/common/cloud/mock_cloud_policy_store.h"
#include "components/policy/core/common/cloud/test/policy_builder.h"
#include "components/policy/proto/device_management_backend.pb.h"
#include "content/public/test/browser_test.h"
namespace {
using ClassManagementEnabled =
ClassManagementEnabledMetricsProvider::ClassManagementEnabled;
using testing::InvokeWithoutArgs;
constexpr std::string_view kClassManagementDisabled = "disabled";
constexpr std::string_view kClassManagementStudent = "student";
constexpr std::string_view kClassManagementTeacher = "teacher";
constexpr std::string_view kHistogramName = "ChromeOS.ClassManagementEnabled";
void ProvideHistograms() {
// The purpose of the below call is to avoid a DCHECK failure in an unrelated
// metrics provider, in |FieldTrialsProvider::ProvideCurrentSessionData()|.
metrics::SystemProfileProto system_profile_proto;
// Downstream functions do not use system_profile_proto so there is no risk of
// UAF.
g_browser_process->metrics_service()
->GetDelegatingProviderForTesting()
->ProvideSystemProfileMetricsWithLogCreationTime(base::TimeTicks::Now(),
&system_profile_proto);
g_browser_process->metrics_service()
->GetDelegatingProviderForTesting()
->OnDidCreateMetricsLog();
}
class TestCase {
public:
explicit TestCase(std::string_view policy_value,
ClassManagementEnabled segment)
: policy_value_(policy_value), segment_(segment) {}
ClassManagementEnabled GetSegment() const { return segment_; }
std::string_view GetPolicyValue() const { return policy_value_; }
private:
const std::string_view policy_value_;
const ClassManagementEnabled segment_;
};
class ClassManagementEnabledMetricsProviderTest
: public policy::DevicePolicyCrosBrowserTest,
public testing::WithParamInterface<TestCase> {
protected:
ClassManagementEnabledMetricsProviderTest() {
scoped_feature_list_.InitAndEnableFeature(
features::kClassManagementEnabledMetricsProvider);
}
void SetUpInProcessBrowserTestFixture() override {
policy::DevicePolicyCrosBrowserTest::SetUpInProcessBrowserTestFixture();
InitializePolicy();
}
void SetUpCommandLine(base::CommandLine* command_line) override {
command_line->AppendSwitch(ash::switches::kOobeSkipPostLogin);
DevicePolicyCrosBrowserTest::SetUpCommandLine(command_line);
}
void InitializePolicy() {
device_policy()->policy_data().set_public_key_version(1);
}
void SetDevicePolicy() {
device_local_account_policy_.SetDefaultSigningKey();
device_local_account_policy_.Build();
logged_in_user_mixin_.GetEmbeddedPolicyTestServerMixin()
->UpdateExternalPolicy(
policy::dm_protocol::kChromePublicAccountPolicyType,
FakeGaiaMixin::kEnterpriseUser1,
device_local_account_policy_.payload().SerializeAsString());
session_manager_client()->set_device_local_account_policy(
FakeGaiaMixin::kEnterpriseUser1,
device_local_account_policy_.GetBlob());
}
void LogInUser() {
std::unique_ptr<ash::ScopedUserPolicyUpdate> policy =
logged_in_user_mixin_.GetUserPolicyMixin()->RequestPolicyUpdate();
policy->policy_payload()
->mutable_subproto1()
->mutable_classmanagementenabled()
->set_value(GetParam().GetPolicyValue());
logged_in_user_mixin_.LogInUser();
}
int GetExpectedUmaValue() {
return static_cast<int>(GetParam().GetSegment());
}
private:
base::test::ScopedFeatureList scoped_feature_list_;
ash::LoggedInUserMixin logged_in_user_mixin_{
&mixin_host_, /*test_base=*/this, embedded_test_server(),
ash::LoggedInUserMixin::LogInType::kManaged};
policy::UserPolicyBuilder device_local_account_policy_;
};
IN_PROC_BROWSER_TEST_P(ClassManagementEnabledMetricsProviderTest, Uma) {
base::HistogramTester histogram_tester;
SetDevicePolicy();
// Simulate calling ProvideHistograms() prior to logging in.
ProvideHistograms();
// No metrics were recorded.
histogram_tester.ExpectTotalCount(kHistogramName, 0);
LogInUser();
// Simulate calling ProvideHistograms() after logging in.
ProvideHistograms();
histogram_tester.ExpectUniqueSample(kHistogramName, GetExpectedUmaValue(), 1);
}
INSTANTIATE_TEST_SUITE_P(
All,
ClassManagementEnabledMetricsProviderTest,
testing::Values(
TestCase(kClassManagementDisabled, ClassManagementEnabled::kDisabled),
TestCase(kClassManagementStudent, ClassManagementEnabled::kStudent),
TestCase(kClassManagementTeacher, ClassManagementEnabled::kTeacher)));
} // namespace
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