public static IModelBuilder <T> AssertModelDefaultAttribute <T>(this IModelBuilder <T> builder, string propertyName, string propertyValue)
{
var attr = builder.TypeInfo.FindAttributes <ModelDefaultAttribute>().FirstOrDefault(a => a.PropertyName == propertyName);
attr.ShouldSatisfyAllConditions
(
() => attr.ShouldNotBeNull(),
() => attr !.PropertyName.ShouldBe(propertyName),
() => attr !.PropertyValue.ShouldBe(propertyValue)
);
return(builder);
}