使用Espresso找不到ListView中的FooterView

Question

I am writing an espresso test which checks which fails to find a TextView within a FooterView that i added programmatically to a ListView.The only way to find that TextView in the espresso test, is to wait for 1 second before checking if this TextView exists.

    // checks if the list view contains an issue that has the text "Do" somewhere
    onView(withId(R.id.listView)).check(matches(hasDescendant(withText(containsString("Do")))));
    // swipes down to access the load older issues button
    onView(allOf(withId(R.id.mainLayout))).perform(swipeUp());

    // View listView = shelfActivity.getActivity().findViewById(R.id.listView_footer_textview); // returns the view, even when espresso tells that it does not exist
    // Thread.sleep(1000); // need to wait in order to find the footerview of the list view

    // check if the load older issues button is here
    onView(allOf(withId(R.id.listView_footer_textview), isDisplayed())).check(matches(isDisplayed()));

This TextView inside the FooterView is actually existing, and i can find it inside the test on the same place, if i try to get it with the normal findById() method, but dont find it when i check it with espresso.

So my question is: Do i really have to call Thread.sleep(1000) to pass the test if i want to check for a TextView inside a FooterView. For me the great advantage of espresso is, that i do not have to deal with waiting until a view is ready, so is there no espresso feature existing that is doing that automatically?

Answer 1

You can find FooterView of ListView by onData method.

Here is official documents .

For example:

 public static final String FOOTER = "FOOTER"; ... View footerView = layoutInflater.inflate(R.layout.list_item, listView, false); ((TextView) footerView.findViewById(R.id.item_content)).setText("count:"); ((TextView) footerView.findViewById(R.id.item_size)).setText(String.valueOf(data.size())); listView.addFooterView(footerView, FOOTER, true); 

Then, you can write a matcher that matches this object:

 import static org.hamcrest.Matchers.allOf; import static org.hamcrest.Matchers.instanceOf; import static org.hamcrest.Matchers.is; @SuppressWarnings("unchecked") public static Matcher<Object> isFooter() { return allOf(is(instanceOf(String.class)), is(LongListActivity.FOOTER)); } 

And loading the view in a test is trivial:

 import static com.google.android.apps.common.testing.ui.espresso.Espresso.onData; import static com.google.android.apps.common.testing.ui.espresso.action.ViewActions.click; import static com.google.android.apps.common.testing.ui.espresso.sample.LongListMatchers.isFooter; public void testClickFooter() { onData(isFooter()) .perform(click()); ... }