InstaTax.Core.DomainObjects.HalfExemptDonation.GetDeduction C# (CSharp) Method

        public override double GetDeduction()
        {
            return this.Amount * 0.5;
        }

 public void DeductionForAHalfExemptDonationUnder80GShouldbeZeroIfDonationIsZero()
 {
     DonationUnder80G donation = new HalfExemptDonation(0);
     Assert.AreEqual(0, donation.GetDeduction(), 0.001);
 }