observable_value

Description:

observable value

A value wrapper for streams & ValueListenables that can be bound to a datasource.
The datasource can be another Stream, ValueListenable or a KVStore, which is a key-value store abstraction plugin.
var store = KVStore.build( 'test_box' );
await store.init();
await store.open();
const String key = 'test_key_1';

ObservableValue observable = ObservableValue<int>(
key: key,
defaultValue: 0,
);

observable.bind(
store,
);

expect( observable.value, equals( 0 ) );

await store.set( key, 1 );

expect( observable.value, equals( 1 ) );

await store.set( key, 2 );

expect( observable.value, equals( 2 ) );
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