Size

80

30

));

Find the width of surface size, specified when
setting the surface size; the default is 800.
For example, in the following snippet it’s 600:

tester

binding

setSurfaceSize

animationSheet

sheetSize

600

));

The frames per row should be the result of the two
numbers divided, rounded down. For example, 
600 / 80 = 7 (rounded down), therefore

animationSheet

collate

Migrate code

Code before migration:

testWidgets

'Indeterminate CircularProgressIndicator'

WidgetTester

tester

async

final