existsAtMostOnce method
Asserts that at most one widget of type W
exists.
Implementation
WidgetMatcher<W> existsAtMostOnce() =>
WidgetMatcher.fromSnapshot(_exists(max: 1));
Asserts that at most one widget of type W
exists.
WidgetMatcher<W> existsAtMostOnce() =>
WidgetMatcher.fromSnapshot(_exists(max: 1));