76 lines
1.8 KiB
Dart
76 lines
1.8 KiB
Dart
|
import 'dart:async';
|
||
|
|
import 'package:data_loader/data_loader.dart';
|
||
|
|
import 'package:test/test.dart';
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
var numbers = List.generate(10, (i) => i.toStringAsFixed(2));
|
||
|
|
var numberLoader = DataLoader<int, String>((ids) {
|
||
|
|
print('ID batch: $ids');
|
||
|
|
return ids.map((i) => numbers[i]);
|
||
|
|
});
|
||
|
|
|
||
|
|
test('batch', () async {
|
||
|
|
var zero = numberLoader.load(0);
|
||
|
|
var one = numberLoader.load(1);
|
||
|
|
var two = numberLoader.load(2);
|
||
|
|
var batch = await Future.wait([zero, one, two]);
|
||
|
|
print('Fetched result: $batch');
|
||
|
|
expect(batch, ['0.00', '1.00', '2.00']);
|
||
|
|
});
|
||
|
|
|
||
|
|
group('cache', () {
|
||
|
|
DataLoader<int, _Unique> uniqueLoader, noCache;
|
||
|
|
|
||
|
|
setUp(() {
|
||
|
|
uniqueLoader = DataLoader<int, _Unique>((ids) async {
|
||
|
|
var numbers = await numberLoader.loadMany(ids);
|
||
|
|
return numbers.map((s) => _Unique(s));
|
||
|
|
});
|
||
|
|
noCache = DataLoader(uniqueLoader.loadMany, cache: false);
|
||
|
|
});
|
||
|
|
|
||
|
|
tearDown(() {
|
||
|
|
uniqueLoader.close();
|
||
|
|
noCache.close();
|
||
|
|
});
|
||
|
|
|
||
|
|
test('only lookup once', () async {
|
||
|
|
var a = await uniqueLoader.load(3);
|
||
|
|
var b = await uniqueLoader.load(3);
|
||
|
|
expect(a, b);
|
||
|
|
});
|
||
|
|
|
||
|
|
test('can be disabled', () async {
|
||
|
|
var a = await noCache.load(3);
|
||
|
|
var b = await noCache.load(3);
|
||
|
|
expect(a, isNot(b));
|
||
|
|
});
|
||
|
|
|
||
|
|
test('clear', () async {
|
||
|
|
var a = await uniqueLoader.load(3);
|
||
|
|
uniqueLoader.clear(3);
|
||
|
|
var b = await uniqueLoader.load(3);
|
||
|
|
expect(a, isNot(b));
|
||
|
|
});
|
||
|
|
|
||
|
|
test('clearAll', () async {
|
||
|
|
var a = await uniqueLoader.load(3);
|
||
|
|
uniqueLoader.clearAll();
|
||
|
|
var b = await uniqueLoader.load(3);
|
||
|
|
expect(a, isNot(b));
|
||
|
|
});
|
||
|
|
|
||
|
|
test('prime', () async {
|
||
|
|
uniqueLoader.prime(3, _Unique('hey'));
|
||
|
|
var a = await uniqueLoader.load(3);
|
||
|
|
expect(a.value, 'hey');
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
class _Unique {
|
||
|
|
final String value;
|
||
|
|
|
||
|
|
_Unique(this.value);
|
||
|
|
}
|