public void OperatorString_ShouldBeMinus_WhenOperatorIs3()
{
captcha = new KataCaptcha(1, 1, 3, 1);
Assert.AreEqual("-", captcha.GetOperator());
}
public void OperatorString_ShouldBeMultiple_WhenOperatorIs2()
{
captcha = new KataCaptcha(1, 1, 2, 1);
Assert.AreEqual("*", captcha.GetOperator());
}