public void Should_be_able_to_generate_a_multiply_captcha_question()
 {
     var question = new CaptchaGeneator()
         .ConfigureToUse(CaptchaOpperator.Multiply);
     question.ToString().ShouldContain(" * ");
     question.ToString().Length.ShouldEqual(5);
 }
 public void Should_be_able_to_generate_a_subtract_captcha_question()
 {
     var question = new CaptchaGeneator()
         .ConfigureToUse(CaptchaOpperator.Subtract);
     question.ToString().ShouldContain(" - ");
     question.ToString().Length.ShouldEqual(5);
 }
        public void Should_be_able_to_generate_a_add_or_substract_captcha_question()
        {
            var question = new CaptchaGeneator()
                .ConfigureToUse(CaptchaOpperator.Add)
                .ConfigureToUse(CaptchaOpperator.Subtract);

            Assert.That((question.ToString().Contains(" + ") || question.ToString().Contains(" - ")), Is.True);

            question.ToString().Length.ShouldEqual(5);
        }