ShouldBeNull
and ShouldNotBeNull
allow you to check whether a value is null.ShouldNotBeNull
returns the non-null value if it succeeds so that further assertions can be chained. When used with a reference type, the returned value is the same reference annotated as non-null. Equivalently, when used on a System.Nullable<T>
expression, the returned value is the unwrapped T
value.