Whether to have pump with a duration only pump a single frame (as would happen in a normal test environment using AutomatedTestWidgetsFlutterBinding), or whether to instead pump every frame that the system requests during any asynchronous pause in the test (as would normally happen when running an application with WidgetsFlutterBinding).
false is the default behavior, which is to only pump once.
true allows all frame requests from the engine to be serviced.
Setting this to true means pumping extra frames, which might
involve calling builders more, or calling paint callbacks more,
etc, which might interfere with the test. If you know your test
file wouldn't be affected by this, you can set it to true
persistently in that particular test file. To set this to true
while still allowing the test file to work as a normal test, add
the following code to your test file at the top of your void
main() { } function, before calls to testWidgets:
TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
if (binding is LiveTestWidgetsFlutterBinding)
binding.allowAllFrames = true;