Add test ForceL3FallbackPreferenceControllerTest

        "kotlinx_coroutines_test",

        "flag-junit",

        "Settings-testutils2",

        "MediaDrmSettingsFlagsLib",

        // Don't add SettingsLib libraries here - you can use them directly as they are in the

        // instrumented Settings app.

    ],

/*

* Copyright (C) 2023 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

*      http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package com.android.settings.development.widevine;

import static com.google.common.truth.Truth.assertThat;

import static org.junit.Assume.assumeTrue;

import static org.junit.Assume.assumeNoException;

import android.content.Context;

import android.media.MediaDrm;

import android.media.UnsupportedSchemeException;

import android.media.NotProvisionedException;

import android.sysprop.WidevineProperties;

import android.util.Log;

import android.content.Context;

import com.android.settings.media_drm.Flags;

import android.platform.test.flag.junit.SetFlagsRule;

import androidx.preference.SwitchPreference;

import androidx.test.core.app.ApplicationProvider;

import androidx.test.ext.junit.runners.AndroidJUnit4;

import org.junit.Before;

import org.junit.Rule;

import org.junit.Test;

import org.junit.runner.RunWith;

import java.util.UUID;

@RunWith(AndroidJUnit4.class)

public class ForceL3FallbackPreferenceControllerTest {

    private static final String PREF_KEY = "force_l3_fallback";

    private static final UUID WIDEVINE_UUID =

        new UUID(0xEDEF8BA979D64ACEL, 0xA3C827DCD51D21EDL);

    private static final String TAG = "ForceL3FallbackPreferenceControllerTest";

    @Rule public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();

    private Context mContext;

    private ForceL3FallbackPreferenceController mController;

    private SwitchPreference mPreference;

    @Before

    public void setUp() {

        mContext = ApplicationProvider.getApplicationContext();

        mController = new ForceL3FallbackPreferenceController(mContext, PREF_KEY);

        mPreference = new SwitchPreference(mContext);

        WidevineProperties.forcel3_enabled(false);

    }

    @Test

    public void updateState_flagEnabled_checkPreference() {

        mSetFlagsRule.enableFlags(Flags.FLAG_FORCE_L3_ENABLED);

        mController.updateState(mPreference);

        assertThat(mPreference.isEnabled()).isTrue();

        assertThat(mPreference.isChecked()).isFalse();

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isFalse();

        // Toggle to true

        mController.setChecked(true);

        mController.updateState(mPreference);

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isTrue();

        assertThat(mPreference.isEnabled()).isTrue();

        assertThat(mPreference.isChecked()).isTrue();

        // Toggle to false

        mController.setChecked(false);

        mController.updateState(mPreference);

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isFalse();

        assertThat(mPreference.isEnabled()).isTrue();

        assertThat(mPreference.isChecked()).isFalse();

        // Test flag rollback

        mController.setChecked(true);

        mController.updateState(mPreference);

        assertThat(mPreference.isChecked()).isTrue();

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isTrue();

        mSetFlagsRule.disableFlags(Flags.FLAG_FORCE_L3_ENABLED);

        mController.updateState(mPreference);

        assertThat(mPreference.isEnabled()).isFalse();

        assertThat(mPreference.isChecked()).isFalse();

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isFalse();

    }

    @Test

    public void updateState_flagDisabled_checkPreference() {

        mSetFlagsRule.disableFlags(Flags.FLAG_FORCE_L3_ENABLED);

        mController.updateState(mPreference);

        assertThat(mPreference.isEnabled()).isFalse();

    }

    @Test

    public void updateState_checkWidevine() throws Exception {

        MediaDrm drm;

        try {

            drm = new MediaDrm(WIDEVINE_UUID);

            assumeTrue(drm.getPropertyString("securityLevel").equals("L1"));

            mSetFlagsRule.enableFlags(Flags.FLAG_FORCE_L3_ENABLED);

            drm.close();

        } catch (UnsupportedSchemeException ex) {

            assumeNoException(ex);

        }

        // L3 enforced

        mController.setChecked(true);

        mController.updateState(mPreference);

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isTrue();

        assertThat(mPreference.isEnabled()).isTrue();

        assertThat(mPreference.isChecked()).isTrue();

        drm = new MediaDrm(WIDEVINE_UUID);

        assertThat(drm.getPropertyString("securityLevel")).isEqualTo("L3");

        // Switch back to L1

        mController.setChecked(false);

        mController.updateState(mPreference);

        drm.close();

        drm = new MediaDrm(WIDEVINE_UUID);

        assertThat(drm.getPropertyString("securityLevel")).isEqualTo("L1");

    }

}