public void AddTax_PurchasePrice_Zero()
        {
            //Arrange
            WriteBetterCodeExample process = new WriteBetterCodeExample();

            //Act
            double result = process.AddTax(0);

            //Asert
            Assert.AreEqual(0, result);
        }
        public void AddTax_overOneHundred()
        {
            //Arrange
            WriteBetterCodeExample process = new WriteBetterCodeExample();

            //Act
            double result = process.AddTax(100);

            //Asert
            Assert.AreEqual(107.00, result);
        }