Get RecyclerView total item count in espresso

Question

I am using RecyclerView and i need to get the total count of items in the RecyclerView using android espresso. How can i do it ?

Possible duplicate of [How to count RecyclerView items with Espresso](https://stackoverflow.com/questions/36399787/how-to-count-recyclerview-items-with-espresso) — tir38, Feb 26 '19 at 18:34

score 5 · Answer 1 · answered Feb 16 '17 at 13:18

5

I would do it like this:

@Rule
public ActivityTestRule<MyClass> activityRule = new ActivityTestRule(MyActivity.class);

@Test
public void myTest() {
    RecyclerView recyclerView = activityRule.getActivity().findViewById(R.id.my_recyclerview)
    int itemCount = recyclerView.getAdapter().getItemCount();
}

answered Feb 16 '17 at 13:18

TheKarlo95

1,144
9
17

Minor comment, `;` is missing in first line of myTest method, not able to edit answer – Naeemahemad May 24 '19 at 12:25
1

ActivityTestRule is replaced by ActivityScenarioRule. would you please comment on How to do it in ActivityScenarioRule – Rahul Matte Aug 22 '20 at 22:58

score 0 · Answer 2 · answered Feb 11 '19 at 16:14

While Thekarlo95's answer specifically and fully answers the question, I would like to show my example on how to use his method together with Stéphane's method to test a difference in count before and after specific action:

@Test
public void FilterClickShouldChangeRecyclerViewCount() {
    // Get items count before action
    RecyclerView recyclerView = mActivityTestRule.getActivity().findViewById(R.id.recycler_view);
    int countBefore = Objects.requireNonNull(recyclerView.getAdapter()).getItemCount();
    Log.e("count", "Items count before: " + countBefore);

    // Perform action
    ViewInteraction actionMenuItemView = onView(
            allOf(
                    withId(R.id.action_filter),
                    withContentDescription("Show Favorites")));
    actionMenuItemView.perform(click());

    // Verify that items count has changed
    onView(withId(R.id.recycler_view))
            // Instead of 'not', you can use any other hamcrest Matcher like 'is', 'lessThan' etc.
            .check(new RecyclerViewItemCountAssertion(not(countBefore)));
}

And below is a code for RecyclerViewItemCountAssertion class (just put it on a separate file). Note there are two constructors available:

RecyclerViewItemCountAssertion(int expectedCount) - parameter of type integer is expected, default is matcher is used.

RecyclerViewItemCountAssertion(Matcher<Integer> matcher) - parameter of type Matcher<Integer> is expected, like is(3), lessThan(4) etc.

public class RecyclerViewItemCountAssertion implements ViewAssertion {

    private final Matcher<Integer> matcher;

    public RecyclerViewItemCountAssertion(int expectedCount) {
        this.matcher = is(expectedCount);
    }

    public RecyclerViewItemCountAssertion(Matcher<Integer> matcher) {
        this.matcher = matcher;
    }

    @Override
    public void check(View view, NoMatchingViewException noViewFoundException) {
        if (noViewFoundException != null) {
            throw noViewFoundException;
        }

        RecyclerView recyclerView = (RecyclerView) view;
        RecyclerView.Adapter adapter = recyclerView.getAdapter();
        assert adapter != null;
        assertThat(adapter.getItemCount(), matcher);
    }
}

score 0 · Answer 3 · answered Sep 07 '21 at 09:36

with ActivityScenarioRule

@get: Rule
val activityScenarioRule = ActivityScenarioRule(ShowListActivity::class.java)
@Test
fun testItemCount(){
    activityScenarioRule.scenario.onActivity { activityScenarioRule ->
        val recyclerView = activityScenarioRule.findViewById<RecyclerView>(R.id.movieListRecyclerView)
        val itemCount = recyclerView.adapter?.itemCount?:0
    ....
    }
}

Get RecyclerView total item count in espresso

3 Answers3