Merge "Throw IllegalArgumentException when calling...

     * {@link #CREDENTIAL_TYPE_PASSWORD}

     */

    public @CredentialType int getCredentialTypeForUser(int userHandle) {

        if (userHandle < 0) {

            throw new IllegalArgumentException("Invalid userHandle: " + userHandle);

        }

        try {

            return getLockSettings().getCredentialType(userHandle);

        } catch (RemoteException re) {

import static org.junit.Assert.assertNotEquals;

import static org.junit.Assert.assertTrue;

import static org.testng.Assert.assertThrows;

import android.content.Context;

import android.os.UserHandle;

import androidx.test.filters.SmallTest;

import androidx.test.platform.app.InstrumentationRegistry;

import androidx.test.runner.AndroidJUnit4;

import org.junit.Test;

@SmallTest

public class LockPatternUtilsTest {

    private static final int INVALID_USER_ID = -1;

    private final Context mContext = InstrumentationRegistry.getInstrumentation().getContext();

    @Test

    public void testUserFrp_isNotRegularUser() throws Exception {

        assertTrue(LockPatternUtils.USER_FRP < 0);

        assertNotEquals(UserHandle.USER_CURRENT, LockPatternUtils.USER_FRP);

        assertNotEquals(UserHandle.USER_CURRENT_OR_SELF, LockPatternUtils.USER_FRP);

    }

    @Test

    public void getCredentialTypeForUser_invalidUserId_throwsIllegalArgumentException() {

        assertThrows(IllegalArgumentException.class,

                () -> new LockPatternUtils(mContext).getCredentialTypeForUser(INVALID_USER_ID));

    }

}