40 lines
1.1 KiB
Dart
40 lines
1.1 KiB
Dart
import 'dart:async';
|
|
|
|
import 'package:flutter_test/flutter_test.dart';
|
|
import 'package:plezy/utils/serial_future_queue.dart';
|
|
|
|
void main() {
|
|
test('a failed operation does not poison the next queued operation', () async {
|
|
final queue = SerialFutureQueue();
|
|
|
|
await expectLater(queue.run<void>(() async => throw StateError('failed')), throwsStateError);
|
|
expect(await queue.run(() async => 42), 42);
|
|
await queue.settled;
|
|
});
|
|
|
|
test('operations remain serialized while callers receive their own results', () async {
|
|
final queue = SerialFutureQueue();
|
|
final firstStarted = Completer<void>();
|
|
final releaseFirst = Completer<void>();
|
|
var secondStarted = false;
|
|
|
|
final first = queue.run(() async {
|
|
firstStarted.complete();
|
|
await releaseFirst.future;
|
|
return 'first';
|
|
});
|
|
final second = queue.run(() async {
|
|
secondStarted = true;
|
|
return 'second';
|
|
});
|
|
|
|
await firstStarted.future;
|
|
await Future<void>.delayed(Duration.zero);
|
|
expect(secondStarted, isFalse);
|
|
|
|
releaseFirst.complete();
|
|
expect(await first, 'first');
|
|
expect(await second, 'second');
|
|
});
|
|
}
|