Collect: Espresso regression tests failing sporadically

[seadowg]

The DrawWidgetTest and SignatureWidgetTest appear to be failing on most runs on Test Lab but not in a predictable manner. The actual failure appears to be:

androidx.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with id: org.odk.collect.android:id/jumpEndButton 

[grzesiek2010]

I'm pretty sure the problem is related to orientation changes...
in those tests, we use DrawActivity which works in landscape mode. When a user returns from that activity to DrawWidget/SignatureWidget a rotation will take place landscape->portrait. It might take some time and probably it's the cause.

What do you think about calling waitForIdleSync every time we get back from that activity to wait for the rotation end?

https://stackoverflow.com/a/38860384

[seadowg]

@grzesiek2010 my impression is that Espresso should be doing that for us but it's definitely worth a try. I hadn't thought about the screen rotations and it wouldn't surprise me if that messes with Espresso...

[grzesiek2010]

@seadowg so maybe let's try it https://github.com/opendatakit/collect/pull/3277

[seadowg]

@grzesiek2010 do you think it's worth merging in #3276 first as a temporary measure or are you pretty close with #3277?

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[seadowg]

Sorry I should have closed this with #3276.