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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 "base/values.h"
#include "chrome/browser/policy/policy_test_utils.h"
#include "chromeos/ash/components/audio/cras_audio_handler.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/policy_constants.h"
#include "content/public/test/browser_test.h"
namespace policy {
namespace {
class TestAudioObserver : public ash::CrasAudioHandler::AudioObserver {
public:
TestAudioObserver() : output_mute_changed_count_(0) {}
~TestAudioObserver() override = default;
TestAudioObserver(const TestAudioObserver&) = delete;
TestAudioObserver& operator=(const TestAudioObserver&) = delete;
int output_mute_changed_count() const { return output_mute_changed_count_; }
protected:
// ash::CrasAudioHandler::AudioObserver overrides.
void OnOutputMuteChanged(bool /* mute_on */) override {
++output_mute_changed_count_;
}
private:
int output_mute_changed_count_;
};
} // namespace
IN_PROC_BROWSER_TEST_F(PolicyTest, DisableAudioOutput) {
// Set up the mock observer.
auto* audio_handler = ash::CrasAudioHandler::Get();
std::unique_ptr<TestAudioObserver> test_observer(new TestAudioObserver);
audio_handler->AddAudioObserver(test_observer.get());
bool prior_state = audio_handler->IsOutputMuted();
// Make sure the audio is not muted and then toggle the policy and observe
// if the output mute changed event is fired.
audio_handler->SetOutputMute(false);
EXPECT_FALSE(audio_handler->IsOutputMuted());
EXPECT_EQ(1, test_observer->output_mute_changed_count());
PolicyMap policies;
policies.Set(key::kAudioOutputAllowed, POLICY_LEVEL_MANDATORY,
POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD, base::Value(false),
nullptr);
UpdateProviderPolicy(policies);
EXPECT_TRUE(audio_handler->IsOutputMuted());
// This should not change the state now and should not trigger output mute
// changed event.
audio_handler->SetOutputMute(false);
EXPECT_TRUE(audio_handler->IsOutputMuted());
EXPECT_EQ(1, test_observer->output_mute_changed_count());
// Toggle back and observe if the output mute changed event is fired.
policies.Set(key::kAudioOutputAllowed, POLICY_LEVEL_MANDATORY,
POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD, base::Value(true),
nullptr);
UpdateProviderPolicy(policies);
EXPECT_FALSE(audio_handler->IsOutputMuted());
EXPECT_EQ(1, test_observer->output_mute_changed_count());
audio_handler->SetOutputMute(true);
EXPECT_TRUE(audio_handler->IsOutputMuted());
EXPECT_EQ(2, test_observer->output_mute_changed_count());
// Revert the prior state.
audio_handler->SetOutputMute(prior_state);
audio_handler->RemoveAudioObserver(test_observer.get());
}
} // namespace policy
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