使用Espresso在微调器中选择关闭屏幕项目

Question

I have a Spinner with 20 items. The below code works if the item is displayed on the screen when user click on the spinner.

onData(allOf(is(instanceOf(SpinnerItem.class)), is(item))).perform(click());

For item that are requiring scrolling, the test will hit the below exception:

android.support.test.espresso.PerformException: Error performing 'single click - At Coordinates: 719, -243 and precision: 16, 16' on view ' displaying data matching: (is an instance of SpinnerItem and is <Text>) within adapter view matching: is assignable from class: class android.widget.AdapterView'.
at android.support.test.espresso.PerformException$Builder.build(PerformException.java:83)
...

you can clearly see that the y-position is at -243 and therefore it couldn't perform the clicking. I tried to add perform(scrollTo(), click()) but it's complaining the scrollTo doesn't work with onData.

Appreciate for any help. Thanks!

Answer 1

I also have a large spinner and scrolling works fine. My code is the following:

onData(allOf(is(instanceOf(String.class)), containsString("5.1.3"))).perform(click());

Using espresso 2.2.2:

com.android.support.test.espresso:espresso-core:2.2.2

The only difference is that I use String in my adapter instead of custom class. Maybe you should try to switch from SpinnerItem to String just to view will this error be gone or not?

Also problem can be in is(SpinnerItem) . You can try to write own Matcher for your SpinnerItems, like this:

public static Matcher<Object> withContent(final String content) {
    return new BoundedMatcher<Object, SpinnerItem>(SpinnerItem.class) {
        @Override
        public boolean matchesSafely(SpinnerItem myObj) {
            return myObj.content == content;
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("with content '" + content + "'");
        }
    };
}

and use:

onData(withContent("5.")).inAdapterView(withId(R.id.contents_theory_listview)).perform(click());

This example suppose you have a content field in your item and you can check for its equality with the pattern.

I hope I gave you some ideas and they will help you.