Add unit test coverage for BlockedNumbersUtil

/*

 * Copyright (C) 2021 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.server.telecom.tests;

import static org.mockito.ArgumentMatchers.any;

import static org.mockito.ArgumentMatchers.anyInt;

import static org.mockito.ArgumentMatchers.isNull;

import static org.mockito.Mockito.verify;

import android.app.Notification;

import android.app.NotificationManager;

import android.os.UserHandle;

import android.test.suitebuilder.annotation.SmallTest;

import com.android.server.telecom.settings.BlockedNumbersUtil;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)

public class BlockedNumbersUtilTests extends TelecomTestCase {

    @Override

    @Before

    public void setUp() throws Exception {

        super.setUp();

    }

    @SmallTest

    @Test

    public void testPostNotification() {

        BlockedNumbersUtil.updateEmergencyCallNotification(mContext, true);

        NotificationManager mgr = mComponentContextFixture.getNotificationManager();

        verify(mgr).notifyAsUser(isNull(), anyInt(), any(Notification.class),

                any(UserHandle.class));

    }

    @SmallTest

    @Test

    public void testDismissNotification() {

        BlockedNumbersUtil.updateEmergencyCallNotification(mContext, false);

        NotificationManager mgr = mComponentContextFixture.getNotificationManager();

        verify(mgr).cancelAsUser(isNull(), anyInt(), any(UserHandle.class));

    }

}

        return mTelephonyManager;

    }

    public NotificationManager getNotificationManager() {

        return mNotificationManager;

    }

    private void addService(String action, ComponentName name, IInterface service) {

        mComponentNamesByAction.put(action, name);

        mServiceByComponentName.put(name, service);