Add BluetoothTetheringNetworkFactoryTest

/*

 * Copyright 2022 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.bluetooth.pan;

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

import static org.mockito.Mockito.times;

import static org.mockito.Mockito.verify;

import static org.mockito.Mockito.when;

import android.bluetooth.BluetoothAdapter;

import android.bluetooth.BluetoothDevice;

import android.bluetooth.BluetoothManager;

import android.content.Context;

import android.os.Looper;

import androidx.test.core.app.ApplicationProvider;

import androidx.test.filters.SmallTest;

import androidx.test.runner.AndroidJUnit4;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

import java.util.ArrayList;

import java.util.List;

/**

 * Test cases for {@link BluetoothTetheringNetworkFactory}.

 */

@SmallTest

@RunWith(AndroidJUnit4.class)

public class BluetoothTetheringNetworkFactoryTest {

    @Mock

    private PanService mPanService;

    private Context mContext = ApplicationProvider.getApplicationContext();

    @Before

    public void setUp() {

        MockitoAnnotations.initMocks(this);

    }

    @Test

    public void networkStartReverseTetherEmptyIface() {

        if (Looper.myLooper() == null) {

            Looper.prepare();

        }

        BluetoothTetheringNetworkFactory bluetoothTetheringNetworkFactory =

                new BluetoothTetheringNetworkFactory(mContext, Looper.myLooper(), mPanService);

        String iface = "";

        bluetoothTetheringNetworkFactory.startReverseTether(iface);

        assertThat(bluetoothTetheringNetworkFactory.getProvider()).isNull();

    }

    @Test

    public void networkStartReverseTether() {

        if (Looper.myLooper() == null) {

            Looper.prepare();

        }

        BluetoothTetheringNetworkFactory bluetoothTetheringNetworkFactory =

                new BluetoothTetheringNetworkFactory(mContext, Looper.myLooper(), mPanService);

        String iface = "iface";

        bluetoothTetheringNetworkFactory.startReverseTether(iface);

        assertThat(bluetoothTetheringNetworkFactory.getProvider()).isNotNull();

    }

    @Test

    public void networkStartReverseTetherStop() {

        if (Looper.myLooper() == null) {

            Looper.prepare();

        }

        BluetoothTetheringNetworkFactory bluetoothTetheringNetworkFactory =

                new BluetoothTetheringNetworkFactory(mContext, Looper.myLooper(), mPanService);

        String iface = "iface";

        bluetoothTetheringNetworkFactory.startReverseTether(iface);

        assertThat(bluetoothTetheringNetworkFactory.getProvider()).isNotNull();

        BluetoothAdapter adapter =

                mContext.getSystemService(BluetoothManager.class).getAdapter();

        List<BluetoothDevice> bluetoothDevices = new ArrayList<>();

        BluetoothDevice bluetoothDevice = adapter.getRemoteDevice("11:11:11:11:11:11");

        bluetoothDevices.add(bluetoothDevice);

        when(mPanService.getConnectedDevices()).thenReturn(bluetoothDevices);

        bluetoothTetheringNetworkFactory.stopReverseTether();

        verify(mPanService, times(1)).getConnectedDevices();

        verify(mPanService, times(1)).disconnect(bluetoothDevice);

    }

}