DeckardEspressoTest.java

package com.example.activity;

import android.test.ActivityInstrumentationTestCase2;
import android.test.suitebuilder.annotation.LargeTest;
import android.widget.Button;

import com.example.R;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withText;

@LargeTest
public class DeckardEspressoTest extends ActivityInstrumentationTestCase2<DeckardActivity> {

    public DeckardEspressoTest() {
        super(DeckardActivity.class);
    }

    @Override
    public void setUp() throws Exception {
        super.setUp();
        getActivity();
    }

    public void testActivityShouldHaveText() throws InterruptedException {
        onView(withId(R.id.editText)).check(matches(withText("")));
        onView(withId(R.id.button)).perform(click());
        onView(withId(R.id.editText)).check(matches(withText("Hello World")));

    }
}