byElementPredicate method
Finds components using an element predicate
.
Sample code
expect(find.byElementPredicate(
// finds elements of type SingleChildElement, including
// those that are actually subclasses of that type.
// (contrast with byElementType, which only returns exact matches)
(Element element) => element is SingleChildElement,
description: '$SingleChildElement element',
), findsOneComponent);
If description
is provided, then this uses it as the description of the
Finder and appears, for example, in the error message when the finder
fails to locate the desired component. Otherwise, the description prints the
signature of the predicate function.
Implementation
Finder byElementPredicate(ElementPredicate predicate, {String? description}) {
return _ElementPredicateFinder(predicate, description: description);
}