poll method

@override Future<void> poll(String description, Future<bool> check(), { Duration interval = const Duration(milliseconds: 100), })

Calls check every interval until it returns true.

Throws a ContainerLaunchException when the container exited in the meantime, or when description did not come true within remaining.

Implementation

@override
Future<void> poll(
  String description,
  Future<bool> Function() check, {
  Duration interval = const Duration(milliseconds: 100),
}) async {
  while (true) {
    final state = await inspect();
    if (!state.running) {
      throw ContainerLaunchException(
        'The container of $image stopped (${state.status}, exit code '
        '${state.exitCode}) before $description',
      );
    }
    if (await check()) {
      return;
    }
    if (remaining <= Duration.zero) {
      throw ContainerLaunchException(
        'The container of $image was not ready after '
        '${_timeout.inSeconds} s: waiting for $description',
      );
    }
    await Future<void>.delayed(interval);
  }
}