`ScrollToAction` doesn't work with `NestedScrollView`

[seadowg]

Description

ScrollToAction currently throws an exception when used on a View which is a descendent of a NestedScrollView (the currently recommended scrollable view for vertical scrolling).

Steps to Reproduce

Write a test that attempts to scroll to a View that is contained within a NestedScrollView:

@Test
fun scrollToView() {
    onView(withId(R.string.view_in_nested_scroll_view)).perform(scrollTo())
}

Expected Results

The scrollTo action scrolls to the view correctly.

Actual Results

Test fails with:

java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints:
(view has effective visibility <VISIBLE> and is descendant of a view matching (is assignable from class <class android.widget.ScrollView> or is assignable from class <class android.widget.HorizontalScrollView> or is assignable from class <class android.widget.ListView>))
Target view: "TextView{id=2131231165, res-name=time, visibility=VISIBLE, width=19, height=41, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=false, is-selected=false, layout-params=androidx.constraintlayout.widget.ConstraintLayout$LayoutParams@3bbb47e7, tag=null, root-is-layout-requested=false, has-input-connection=false, x=16.0, y=272.0, text=Time elapsed: 00:00, input-type=0, ime-target=false, has-links=false}"
	at androidx.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:20)
	at androidx.test.espresso.ViewInteraction.access$100(ViewInteraction.java:1)
	at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.java:2)
	at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.java:1)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at android.os.Handler.$$robo$$android_os_Handler$handleCallback(Handler.java:938)
	at android.os.Handler.handleCallback(Handler.java)
	at android.os.Handler.$$robo$$android_os_Handler$dispatchMessage(Handler.java:99)
	at android.os.Handler.dispatchMessage(Handler.java)
	at org.robolectric.shadows.ShadowPausedLooper$IdlingRunnable.run(ShadowPausedLooper.java:332)
	at org.robolectric.shadows.ShadowPausedLooper.executeOnLooper(ShadowPausedLooper.java:366)
	at org.robolectric.shadows.ShadowPausedLooper.idle(ShadowPausedLooper.java:92)
	at org.robolectric.android.internal.LocalControlledLooper.drainMainThreadUntilIdle(LocalControlledLooper.java:17)
	at androidx.test.espresso.ViewInteraction.waitForAndHandleInteractionResults(ViewInteraction.java:1)
	... 20 more

AndroidX Test and Android OS Versions

AndroidX Test 1.4.0 and any Android version.

[seadowg]

A well documented work around for this is to create your own action to enable scrolling in NestedScrollView. An example of that can be found in this Stack Overflow post.

[TWiStErRob]

Is there an androidx.core:core-test artifact that could house this?

[seadowg]

@TWiStErRob I could definitely be over simplifying, but I think NestedScrollView could be added to the anyOf assertion here to add support to the existing ScrollToAction.

[TWiStErRob]

That would be best, I agree. I have a feeling they can't just add the class reference, because that would mean pulling in a dependency that is not really used. Luckily that method has a String overload, next to the Class one, so there's hope.

[brettchabot]

This should be fixed in espresso 3.5.0

[TZanke]

Thank you, it is working like expected.

(needed to fix https://github.com/android/android-test/issues/1589 first)