public void It_should_not_throw_and_validate_successfully() { var ibanValidator = new FluentIbanValidator(new IbanValidator()); PropertyValidatorContext context = null; // Act // ReSharper disable once ExpressionIsAlwaysNull Func <IEnumerable <ValidationFailure> > act = () => ibanValidator.Validate(context); // Assert act.Should() .NotThrow() .Which.Should() .BeEmpty(); }