ValueListenableProvider<T> class

Listens to a ValueListenable and exposes its current value.

This is useful for testing purposes, to easily simular a provider update:

test('example', () async {
  // Create a ValueNotifier that tests will use to drive the application
  final counter = ValueNotifier(0);

  // Mount the application using ValueListenableProvider
  await tester.pumpComponent(
    ValueListenableProvider<int>.value(
      value: counter,
      child: MyApp(),
    ),
  );

  // Tests can now simulate a provider update by updating the notifier
  // then calling tester.pump()
  counter.value++;
  await tester.pump();
});

Constructors

ValueListenableProvider.value({Key? key, required ValueListenable<T> value, UpdateShouldNotify<T>? updateShouldNotify, Component? child})
Listens to a ValueListenable and exposes its current value.

Properties

child → Component?
Component which will be passed to the build.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one component replaces another component in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

build(BuildContext context) → Iterable<Component>
Describes the part of the user interface represented by this component.
createElement() → Element
Creates a StatelessElement to manage this component's location in the tree.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited