Cross platform Flutter compute method

run.dart

export 'run.io.dart' if (dart.library.html) 'run.web.dart';

run.io.dart

import 'dart:io';

import 'package:flutter/foundation.dart';

Future<T> run<T, R>(Future<T> Function(R args) callback, R args) async {
  final testing = Platform.environment.containsKey('FLUTTER_TEST');
  if (testing) return callback(args);
  return compute(callback, args);
}

run.web.dart

Future<T> run<T, R>(Future<T> Function(R args) callback, R args) async {
  return callback(args);
}