public void Should_resolve_constructor_when_arg_is_optional()
{
var config = new MapperConfiguration(cfg => cfg.CreateMap<SourceFoo, DestinationFoo>());
var sourceBar = new SourceBar("fooBar");
var sourceFoo = new SourceFoo(sourceBar);
var destinationFoo = config.CreateMapper().Map<DestinationFoo>(sourceFoo);
destinationFoo.Bar.ShouldBeNull();
}