檢查選項選單項（使用 Spoon 來擷取螢幕截圖）

/**
 * @author piotrek1543
 *
 * This example provides a specific UI testing problem and how it is already solved 
 * with Google's Espresso. Notice that I used also Spoon framework, as Espresso 
 * lacks of taking screenshots functionality.
 */

@RunWith(AndroidJUnit4.class)
public class MainActivityAndroidTest {
    @Rule
    public ActivityTestRule<MainActivity> mRule = new ActivityTestRule<>(MainActivity.class);

    @Test
    public void checkIfSettingsMenuItemsAreVisible() throws InterruptedException {
        //open OptionsMenu to see available items
        openActionBarOverflowOrOptionsMenu(mRule.getActivity());
        //create a screenshot with 'options_menu' TAG
        Spoon.screenshot(mRule.getActivity(), "options_menu");
        //check if Settings item is Visible
        onView(withText(R.string.action_settings)).check(matches(isDisplayed()));
        //check if `Sort` item is Visible
        onView(withText(R.string.action_sort)).check(matches(isDisplayed()));
        //perform click on `Sort` OptionsMenu item
        onView(withText(R.string.action_sort)).perform(click());
        //create a screenshot with 'options_menu_sort' TAG
        Spoon.screenshot(mRule.getActivity(), "options_menu_sort");
        //check if `Sort -> By Value id` item is Visible
        onView(withText(R.string.menu_sort_length)).check(matches(isDisplayed()));
        //check if `Sort -> By Joke length` item is Visible
        onView(withText(R.string.menu_sort_a_z)).check(matches(isDisplayed()));
    }
}