How do I detect a view that I have created programmatically in espresso

问题

I have this line of Espresso test code:

    onView(withId(R.id.rvWorkDaySchedule)).perform(swipeDown());

And rvWorkDaySchedule is shown in red in the editor of Android Studio because there is no such XML view id in the layouts - I create this RecyclerView programmatically.

So how do I detect views that have been inflated programmatically with Espresso?

回答1:

First of all, Espresso allows you to use Hamcrest matchers in tests.

Hamcrest 1.3 Quick Reference.

The most useful for catching the programmatically added views are withChild, withParent, hasSibling, and hasDescendant.

To make it more clear, I would give a simple example from my app:

onView(withId(R.id.action_bar_details))
        .check(matches(withChild(withChild(withText("Details")))));

Secondly, for RecyclerView tests in Espresso use onData methods instead onView.

Espresso 2.1. Espresso Cheat Sheet Master

Another example from my app - using onData method

onData(anything()).inAdapterView(withId(R.id.listView)).atPosition(getRandomPosition()).
                onChildView(withId(R.id.item)).check(matches(isDisplayed()));

Finally, check these great Googles repository for get more examples

1. GoogleSample
2. GoogleCodeLabs

来源：https://stackoverflow.com/questions/34000017/how-do-i-detect-a-view-that-i-have-created-programmatically-in-espresso