Remove unused method in MediaDeviceUtils

 */

package com.android.settingslib.media;

import android.bluetooth.BluetoothDevice;

/**

 * MediaDeviceUtils provides utility function for MediaDevice

 */

public class MediaDeviceUtils {

    /**

     * Use BluetoothDevice address to represent unique id

     *

     * @param bluetoothDevice the BluetoothDevice

     * @return BluetoothDevice address

     */

    public static String getId(BluetoothDevice bluetoothDevice) {

        return bluetoothDevice.getAddress();

    }

}

package com.android.settingslib.media;

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

import static org.mockito.Mockito.when;

import android.bluetooth.BluetoothDevice;

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;

@RunWith(RobolectricTestRunner.class)

public class MediaDeviceUtilsTest {

    private static final String TEST_ADDRESS = "11:22:33:44:55:66";

    @Mock

    private BluetoothDevice mBluetoothDevice;

    @Before

    public void setUp() {

        MockitoAnnotations.initMocks(this);

    }

    @Test

    public void getId_returnBluetoothDeviceAddress() {

        when(mBluetoothDevice.getAddress()).thenReturn(TEST_ADDRESS);

        final String id = MediaDeviceUtils.getId(mBluetoothDevice);

        assertThat(id).isEqualTo(TEST_ADDRESS);

    }

}