Add base preference controller for new Bluetooth developer option

/*

 * Copyright (C) 2019 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.bluetooth;

import android.bluetooth.BluetoothA2dp;

import android.content.Context;

import com.android.settings.development.BluetoothA2dpConfigStore;

import com.android.settings.development.BluetoothServiceConnectionListener;

import com.android.settingslib.core.lifecycle.Lifecycle;

import com.android.settingslib.core.lifecycle.LifecycleObserver;

import com.android.settingslib.core.lifecycle.events.OnDestroy;

import com.android.settingslib.development.DeveloperOptionsPreferenceController;

/**

 * Abstract class for Bluetooth A2DP config controller in developer option.

 */

public abstract class AbstractBluetoothPreferenceController extends

        DeveloperOptionsPreferenceController implements BluetoothServiceConnectionListener,

        LifecycleObserver, OnDestroy {

    protected final BluetoothA2dpConfigStore mBluetoothA2dpConfigStore;

    protected volatile BluetoothA2dp mBluetoothA2dp;

    public AbstractBluetoothPreferenceController(Context context, Lifecycle lifecycle,

                                                 BluetoothA2dpConfigStore store) {

        super(context);

        mBluetoothA2dpConfigStore = store;

        if (lifecycle != null) {

            lifecycle.addObserver(this);

        }

    }

    @Override

    public void onBluetoothServiceConnected(BluetoothA2dp bluetoothA2dp) {

        mBluetoothA2dp = bluetoothA2dp;

        updateState(mPreference);

    }

    @Override

    public void onBluetoothCodecUpdated() {

        updateState(mPreference);

    }

    @Override

    public void onBluetoothServiceDisconnected() {

        mBluetoothA2dp = null;

        updateState(mPreference);

    }

    @Override

    public void onDestroy() {

        mBluetoothA2dp = null;

    }

    /**

     * Callback interface for this class to manipulate data from controller.

     */

    public interface Callback {

        /**

         * Callback method to notify preferences when the Bluetooth A2DP config is changed.

         */

        void onBluetoothCodecChanged();

        /**

         * Callback method to notify preferences when the HD audio(optional codec) state is changed.

         *

         * @param enabled Is {@code true} when the setting is enabled.

         */

        void onBluetoothHDAudioEnabled(boolean enabled);

    }

}

/*

 * Copyright (C) 2019 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.bluetooth;

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

import static org.mockito.Mockito.any;

import static org.mockito.Mockito.spy;

import static org.mockito.Mockito.verify;

import android.bluetooth.BluetoothA2dp;

import android.content.Context;

import androidx.lifecycle.LifecycleOwner;

import com.android.settings.development.BluetoothA2dpConfigStore;

import com.android.settingslib.core.lifecycle.Lifecycle;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

import org.robolectric.RobolectricTestRunner;

import org.robolectric.RuntimeEnvironment;

@RunWith(RobolectricTestRunner.class)

public class AbstractBluetoothPreferenceControllerTest {

    @Mock

    private BluetoothA2dpConfigStore mBluetoothA2dpConfigStore;

    @Mock

    private BluetoothA2dp mBluetoothA2dp;

    private LifecycleOwner mLifecycleOwner;

    private Lifecycle mLifecycle;

    private Context mContext;

    private AbstractBluetoothPreferenceController mController;

    @Before

    public void setup() {

        MockitoAnnotations.initMocks(this);

        mContext = RuntimeEnvironment.application;

        mLifecycleOwner = () -> mLifecycle;

        mLifecycle = new Lifecycle(mLifecycleOwner);

        mController = spy(new AbstractBluetoothPreferenceControllerImpl(mContext, mLifecycle,

                mBluetoothA2dpConfigStore));

    }

    @Test

    public void onBluetoothServiceConnected_checkProfile() {

        assertThat(mController.mBluetoothA2dp).isNull();

        mController.onBluetoothServiceConnected(mBluetoothA2dp);

        assertThat(mController.mBluetoothA2dp).isEqualTo(mBluetoothA2dp);

    }

    @Test

    public void onBluetoothServiceConnected_updateState() {

        mController.onBluetoothServiceConnected(mBluetoothA2dp);

        verify(mController).updateState(any());

    }

    @Test

    public void onBluetoothCodecUpdated_updateState() {

        mController.onBluetoothCodecUpdated();

        verify(mController).updateState(any());

    }

    @Test

    public void onBluetoothServiceDisconnected_clearA2dpProfile() {

        mController.onBluetoothServiceConnected(mBluetoothA2dp);

        assertThat(mController.mBluetoothA2dp).isEqualTo(mBluetoothA2dp);

        mController.onBluetoothServiceDisconnected();

        assertThat(mController.mBluetoothA2dp).isNull();

    }

    @Test

    public void onDestroy_clearA2dpProfile() {

        mController.onBluetoothServiceConnected(mBluetoothA2dp);

        assertThat(mController.mBluetoothA2dp).isEqualTo(mBluetoothA2dp);

        mController.onDestroy();

        assertThat(mController.mBluetoothA2dp).isNull();

    }

    private static class AbstractBluetoothPreferenceControllerImpl extends

            AbstractBluetoothPreferenceController {

        private AbstractBluetoothPreferenceControllerImpl(Context context, Lifecycle lifecycle,

                BluetoothA2dpConfigStore store) {

            super(context, lifecycle, store);

        }

        @Override

        public String getPreferenceKey() {

            return null;

        }

    }

}