public void TestGetPriceReturnNegotiatedPrice4500()
        {
            ProvidedServiceHandler _sut = ProvidedServiceHandler.Instance;
            decimal expected            = 4500;
            decimal actual = _sut.GetPrice(1, 4500);

            Assert.AreEqual(expected, actual);
        }
        public void TestGetPriceReturn0IfThereIsNoNegPriceAndNoServicesOnCase()
        {
            ProvidedServiceHandler _sut = ProvidedServiceHandler.Instance;
            decimal expected            = 0;
            decimal actual = _sut.GetPrice(1, 0);

            Assert.AreEqual(expected, actual);
        }
        public void TestGetPriceReturnCalculatedPrice4750()
        {
            ProvidedServiceHandler _sut = ProvidedServiceHandler.Instance;
            decimal expected            = 4750;
            decimal actual = _sut.GetPrice(2, 0);

            Assert.AreEqual(expected, actual);
        }