public void Convert_NoRegisteredConverter_ShouldThrow()
{
// arrange
var source = new Celcius(23);
var targetType = typeof(Farenheit);
// act & assert
_target.Invoking(t => t.Convert(source, targetType))
.ShouldThrow<ConversionNotRegisteredException>()
.And.Message.Should()
.Contain(source.GetType().Name)
.And.Contain(targetType.Name);
}
