package com.example.helloespressotesting;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import static android.support.test.espresso.Espresso.closeSoftKeyboard;
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.typeText;
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;
/**
* Demonstrate use of Espresso testing.
*/
@RunWith(AndroidJUnit4.class)
public class MainActivityTest {
@Rule
public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule<>(MainActivity.class);
@Test
public void changeText_sameActivity() {
final String MESG = "Hello Down There!";
// Simulate typing text into 'tf'
onView(withId(R.id.tf))
.perform(typeText(MESG));
closeSoftKeyboard();
// Simulate clicking the Button 'startButton'
onView(withId(R.id.startButton)).perform(click());
// Find the target, and check that the text was changed.
onView(withId(R.id.tvTarget))
.check(matches(withText(MESG)));
}
}