public void Select_should_map_a_failed_exceptional_to_another_successful_exceptional()
{
Exceptional <int> exceptional = new InvalidOperationException("invalid");
var anotherExp = exceptional.Select((i) => i.ToString());
anotherExp.Should().BeAssignableTo <Exceptional <string> >();
anotherExp.IsException.Should().BeTrue();
anotherExp.OnException(vs =>
{
vs.Should().BeOfType <InvalidOperationException>();
vs.Message.Should().Be("invalid");
});
}