public void CalculateTax_SalaryLessThen1000_TaxIs10perc_Test()
        {
            // Arrange
            var employee = new Employee
            {
                Salary = 900
            };
            var calc = new FiscalCalc();

            // Act
            var tax = calc.CalculateTax(new[] {employee});

            // Assert
            Assert.AreEqual(tax, 90);
        }
        public void CalculateTax_SumDifferentTaxes_Test()
        {
            // Arrange
            var junior = new Employee { Salary = 900 };
            var middle = new Employee { Salary = 5000 };
            var senior = new Employee { Salary = 100000 };

            var calc = new FiscalCalc();

            // Act
            var tax = calc.CalculateTax(new[] { junior, middle, senior });

            // Assert
            Assert.AreEqual(tax, 36340);
        }