Espresso - How To Click On A Random Recyclerview Item?

There are a few posts that show how can you click a certain fixed item in the RecyclerView with Espresso, like: How to click on an item inside a RecyclerView in Espresso Using Espr

Solution 1:

Use the getActivity() method of ActivityTestRule.

You will be able to use findViewById() (as in any other context) and handle the RecyclerView instance.

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Example:

@RunWith(AndroidJUnit4.class)publicclassRandomBehaviorTest {

    //This rule provides functional testing of a single activity.@Rulepublic ActivityTestRule<MainActivity> mActivityRule =
            newActivityTestRule<>(MainActivity.class);

    @TestpublicvoidclickRandomItem() {
        //Magic happeningintx= getRandomRecyclerPosition(R.id.a_main_recycler);

        onView(withId(R.id.a_main_recycler))
                .perform(RecyclerViewActions
                        .actionOnItemAtPosition(x, click()));
    }

    privateintgetRandomRecyclerPosition(int recyclerId) {
        Randomran=newRandom();
        //Get the actual drawn RecyclerView RecyclerViewrecyclerView= (RecyclerView) mActivityRule
                .getActivity().findViewById(recyclerId);

        //If the RecyclerView exists, get the item count from the adapterintn= (recyclerView == null)
                ? 1
                : recyclerView.getAdapter().getItemCount();

        //Return a random number from 0 (inclusive) to adapter.itemCount() (exclusive) return ran.nextInt(n);
    }

}