Add assumption for presence of FEATURE_TELEPHONY_CALLING.

import static junit.framework.Assert.assertNull;

import static junit.framework.Assert.assertTrue;

import static org.junit.Assume.assumeTrue;

import android.net.Uri;

import android.platform.test.flag.junit.SetFlagsRule;

import android.telephony.PhoneNumberUtils;

import androidx.test.filters.FlakyTest;

import androidx.test.filters.SmallTest;

import androidx.test.runner.AndroidJUnit4;

import com.android.internal.telephony.flags.Flags;

import org.junit.Ignore;

import org.junit.Rule;

import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)

public class PhoneNumberUtilsTest {

    private static final int MIN_MATCH = 7;

    @SmallTest

    @Test

    public void testWithNumberNotEqualToVoiceMail() throws Exception {

        try {

            assertFalse(PhoneNumberUtils.isVoiceMailNumber("911"));

            assertFalse(PhoneNumberUtils.isVoiceMailNumber("tel:911"));

            assertFalse(PhoneNumberUtils.isVoiceMailNumber("+18001234567"));

            assertFalse(PhoneNumberUtils.isVoiceMailNumber(""));

            assertFalse(PhoneNumberUtils.isVoiceMailNumber(null));

        } catch (UnsupportedOperationException e) {

            // Telephony calling is not supported on this device so skip.

            // Note: these tests run against static methods on PhoneNumberUtils, and there is no

            // context available here to check package manager for FEATURE_TELEPHONY_CALLING, so we

            // will catch the exception and do the assumption in this somewhat unorthodox manner.

            assumeTrue("Telephony calling required", false);

        }

        // This test fails on a device without a sim card

        /*TelephonyManager mTelephonyManager =

            (TelephonyManager)getContext().getSystemService(Context.TELEPHONY_SERVICE);