public bool IsAvailable(Feature feature)
{
var result = feature.State;
if (checkerImpl != null)
result = result && checkerImpl.IsAvailable(feature);
return result;
}
public void checker_should_call_internal_checker()
{
var checker = new StateChecker();
var newChecker = Substitute.For<IChecker>();
checker.AddChecker(newChecker);
var feature = new Feature() { State = true };
checker.IsAvailable(feature);
newChecker.Received(1).IsAvailable(feature);
}