[webview_flutter] Android background test times out on FTL #94748
Description
flutter/plugins#4569 adds a native UI test using espresso, but it doesn't seem to run correctly in FTL (see https://github.com/flutter/plugins/pull/4569/files#r762446578 for background):
androidx.test.espresso.AppNotIdleException: Looped for 5404 iterations over 60 SECONDS. The following Idle Conditions failed .
at dalvik.system.VMStack.getThreadStackTrace(Native Method)
at java.lang.Thread.getStackTrace(Thread.java:1736)
at androidx.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:96)
at androidx.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:59)
at androidx.test.espresso.ViewInteraction.waitForAndHandleInteractionResults(ViewInteraction.java:322)
at androidx.test.espresso.ViewInteraction.desugaredPerform(ViewInteraction.java:178)
at androidx.test.espresso.ViewInteraction.perform(ViewInteraction.java:119)
at androidx.test.espresso.flutter.EspressoFlutter$WidgetInteraction.performInternal(EspressoFlutter.java:142)
at androidx.test.espresso.flutter.EspressoFlutter$WidgetInteraction.perform(EspressoFlutter.java:107)
at io.flutter.plugins.webviewflutterexample.BackgroundColorTest.backgroundColor(BackgroundColorTest.java:38)
at java.lang.reflect.Method.invoke(Native Method)
It runs fine when run locally via native-test, and it's failing on the very first line (nothing obscure related to the thing being tested), so it seems like the problem here is that something is wrong with our ability to run this kind of test on our CI at the moment, rather than an issue with the test itself.