1762268 - Add UIAutomator smoke tests

Status: NEW

(GeckoView :: General, task, P3)

Description

[[ex-Mozilla] Agi Sferro | :agi]

Fenix/AC use UIAutomator to run integration testing, we should add some smoke tests to make sure we don't completely break that use case.

Comment 1

[Eitan Isaacson [:eeejay]]

For documentation's sake I managed to break Fenix's UI tests in two ways:

1. The UI tests depend on accurate screen bounds for content elements since they synthesize finger taps when interacting with content. We had a bug in our bounds caching that needed to be addressed. That was fixed here: https://bugzilla.mozilla.org/show_bug.cgi?id=1760880
2. The Fenix UI tests had a very high degree of specificity when looking for onscreen elements including their expected index in their parent node. When we enabled caching the accessibility tree slightly changed (whitespace nodes were added). This caused these selectors to fail. I think the Fenix tests were at fault here because those selectors were too unforgiving for slight tree changes. This was fixed here:
   https://github.com/mozilla-mobile/fenix/issues/24490

Comment 2

[Chris Peterson [:cpeterson]]

P2

Irene suggests this would be a good intern project.