Unit testing, how can I test adding a rule for no internet?

This is my unit testing class:

package com.alinrosu.app.jakewhartonrepolistexample;

import android.app.ListActivity;
import android.content.Context;
import android.support.test.InstrumentationRegistry;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.action.ViewActions.swipeUp;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static org.junit.Assert.*;

/**
 * Instrumentation test, which will execute on an Android device.
 *
 * @see <a href="http://ift.tt/2oljQWD">Testing documentation</a>
 */
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
@Test
public void useAppContext() throws Exception {
    // Context of the app under test.
    Context appContext = InstrumentationRegistry.getTargetContext();

    assertEquals("com.alinrosu.app.jakewhartonrepolistexample", appContext.getPackageName());
}

@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityInstrumentationTest {

    @Rule
    public ActivityTestRule mActivityRule = new ActivityTestRule<>(
            ListActivity.class);

    @Test
    public void pressList(){
        onView(withId(R.id.list)).perform(click());
    }

    @Test
    public void swipeUpList(){
        onView(withId(R.id.list)).perform(swipeUp());
    }
}
}

I need to make another test, in which I test the app without having internet. how can I do that?