Add RadioAccessFamilyTest

/*

 * Copyright 2020 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.internal.telephony;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertTrue;

import android.telephony.RadioAccessFamily;

import android.telephony.TelephonyManager;

import android.test.suitebuilder.annotation.SmallTest;

import android.testing.AndroidTestingRunner;

import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(AndroidTestingRunner.class)

public class RadioAccessFamilyTest extends TelephonyTest {

    @Test

    @SmallTest

    public void testCompareSameFamily() throws Exception {

        // same family same number results in no clear winner

        assertEquals(0, RadioAccessFamily.compare(

                    TelephonyManager.NETWORK_TYPE_BITMASK_HSUPA,

                    TelephonyManager.NETWORK_TYPE_BITMASK_HSDPA));

        // same family, return the one with more total bits, in this case RHS,

        // so compare should be negative.

        assertTrue(0 > RadioAccessFamily.compare(

                TelephonyManager.NETWORK_TYPE_BITMASK_HSUPA,

                TelephonyManager.NETWORK_TYPE_BITMASK_HSDPA

                        | TelephonyManager.NETWORK_TYPE_BITMASK_HSPA));

    }

    @Test

    @SmallTest

    public void testComparedGreatestUnique() throws Exception {

        // Because LHS supports a unique higher-generation RAT, prefer that to a large list of

        // older RATs. Since RHS is greater, compare should be positive.

        assertTrue(0 < RadioAccessFamily.compare(

                TelephonyManager.NETWORK_TYPE_BITMASK_LTE

                        | TelephonyManager.NETWORK_TYPE_BITMASK_LTE_CA,

                TelephonyManager.NETWORK_TYPE_BITMASK_LTE

                        | TelephonyManager.NETWORK_TYPE_BITMASK_HSUPA

                        | TelephonyManager.NETWORK_TYPE_BITMASK_HSDPA

                        | TelephonyManager.NETWORK_TYPE_BITMASK_HSPA));

    }

}