public async Task <decimal> Pump(ITank tank, TimeSpan duration)
{
Console.WriteLine($"Pumping water for {duration}...");
var drainedVolume = 0m;
for (var i = 0; i < duration.TotalSeconds; i++)
{
await Task.Delay(1000);
drainedVolume += tank.Drain(this.FlowRate);
Console.Write(".");
}
Console.WriteLine();
Console.WriteLine($"Pumping finished with volume={drainedVolume} (tank.CurrentVolume={tank.CurrentVolume})");
return(drainedVolume);
}
