// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // @dart=2.9 // Running in unsound null-safety mode is intended to test for potential miscasts // or invalid assertions. import 'package:flutter/src/foundation/_isolates_io.dart'; import 'package:flutter/src/foundation/isolates.dart' as isolates; int returnInt(int arg) { return arg; } Future<int> returnIntAsync(int arg) { return Future<int>.value(arg); } Future<void> testCompute<T>(isolates.ComputeCallback<T, T> callback, T input) async { if (input != await compute(callback, input)) { throw Exception('compute returned bad result'); } } void main() async { await testCompute(returnInt, 10); await testCompute(returnInt, null); await testCompute(returnIntAsync, 10); await testCompute(returnIntAsync, null); }