import 'package:flutter_test/flutter_test.dart';

/// Waits until [condition] holds, checking every few milliseconds, and fails
/// after [timeout]: for what follows a real timer, without betting on how
/// fast a busy machine runs.
Future<void> eventually(
  bool Function() condition, {
  Duration timeout = const Duration(seconds: 10),
}) async {
  final stopwatch = Stopwatch()..start();
  while (!condition()) {
    if (stopwatch.elapsed > timeout) {
      fail('Still not so after $timeout.');
    }
    await Future<void>.delayed(const Duration(milliseconds: 10));
  }
}