NullConstraint
NullConstraint tests that the actual value is null
namespace NUnit.Framework.Constraints
{
public class NullConstraint : Constraint
{
public NullConstraint()
{
Description = "null";
}
public override ConstraintResult ApplyTo<TActual>(TActual actual)
{
return new ConstraintResult(this, actual, actual == null);
}
}
}