public void AddDoubleNaNValidationPredicate()
{
// Arrange.
ValidatableArgument<double> argument =
new ValidatableArgument<double>("argument", 5);
// Act.
argument.IsNotNaN();
// Assert.
Assert.AreEqual(1, argument.ValidationPredicates.Count());
Assert.IsInstanceOfType(argument.ValidationPredicates.First(), typeof(DoubleNotNaNValidationPredicate));
}