Android Espresso testing using Kotlin trying to iterate through ChipGroup

Issue

My app has ChipGroups with individual Chips inside. (Documentation) and (Description)

What I want to do is to use Espresso libraries in Android to test the functionality of these components. I want to click on the Chips, especially their close buttons, to delete them and check that they were actually removed, etc. I have not been able to find information about iterating over ChipGroups like with using the foreach. The methods like Espresso.onView() or .perform() are missing this functionality. The closest I have come is seeing information on RecyclerViews and ListViews.

I have looked at the documentation here and the cheatsheet among others. Any idea what I ought to do to test these components?

Solution

As an option:

fun chipContainsText(text: String) {
    onView(allOf(withText(containsString(text)), isAssignableFrom(Chip::class.java))).check(matches(isDisplayed()))
}

And I use it:

chipContainsText(1000) 

In general, using isAssignableFrom(CLASS_NAME::class.java) is always very helpful in difficult situations.

Layout Screenshot:

Answered By - imbirovsky