state< T extends State< StatefulWidget>> method
The matching state in the widget tree.
Throws a StateError if finder
is empty, matches more than
one state, or matches a widget that has no state.
- Use firstState if you expect to match several states but only want the first.
- Use stateList if you expect to match several states and want all of them.
Implementation
T state<T extends State>(Finder finder) {
TestAsyncUtils.guardSync();
return _stateOf<T>(finder.evaluate().single, finder);
}