Some practical examples of Espresso

gistfile1.txt

@Test
public void ensureTextChangesWork() {
	// Type text and then press the button.
    onView(withId(R.id.inputField))
        .perform(typeText("HELLO"), closeSoftKeyboard());
    onView(withId(R.id.changeText)).perform(click());
 
    // Check that the text was changed.
    onView(withId(R.id.inputField)).check(matches(withText("Lalala")));
}
 
@Test
public void changeText_newActivity() {
    // Type text and then press the button.
    onView(withId(R.id.inputField)).perform(typeText("NewText"),
        closeSoftKeyboard());
    onView(withId(R.id.switchActivity)).perform(click());
 
    // This view is in a different Activity, no need to tell Espresso.
    onView(withId(R.id.resultView)).check(matches(withText("NewText")));
}
 
@Test
public void triggerIntentTest() {
    // check that the button is there
    onView(withId(R.id.button)).check(matches(notNullValue()));
    onView(withId(R.id.button)).check(matches(withText("Start new activity")));
    onView(withId(R.id.button)).perform(click());
    intended(toPackage("testing.android.sample.com.simpleactivity"));
    intended(hasExtra("URL", "http://www.sample.com"));
}