使用Espresso测试RecyclerView是否有数据 [英] Testing RecyclerView if it has data with Espresso

问题描述

我需要编写一个单击测试，让我们说一下RecyclerView中的第一项.在某些情况下，RecyclerView将为空，因此，如果我单击具有0索引的位置，它将失败.我该如何编写这样的测试?要先检查recyclerView是否不为空，然后单击特定位置?

I need to write a test to click, let's say on the first item in my RecyclerView. At some cases the RecyclerView will be empty and therefore if I click on the position with 0 index it will fail. How do I write a test like this? To check first if the recyclerView not empty and then click on the specific position?

推荐答案

问题和评论中存在一些不同的情况.

There are a little bit different scenarios in question and in the comment.

让我们实施下一个测试方案: 如果回收者视图不包含任何内容，则什么也不做.如果回收者"视图中至少有一个元素，请单击第一个元素.

Let's implement the next test scenario: If recycler view does not contain anything, do nothing. If recycler view has at least one element, click on the first.

@Rule
public final ActivityTestRule<YourActivity> mActivityRule = new ActivityTestRule<>(YourActivity.class);

@Test
public void testSample(){
    if (getRVcount() > 0){
        onView(withId(R.id.our_recycler_view)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
    }
}

private int getRVcount(){
    RecyclerView recyclerView = (RecyclerView) mActivityRule.getActivity().findViewById(R.id.our_recycler_view);
    return recyclerView.getAdapter().getItemCount();
}

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