public void CalculateTest()
        {
            TgCalculator calculator = new TgCalculator();

            Assert.AreEqual(0, calculator.Calculate(0));
            Assert.AreEqual(1, Math.Round(calculator.Calculate(45)));
        }
 public void TgTest(double first, double expected)
 {
     IOneArgumentsCalculator calculator = new TgCalculator();
     double result = calculator.Calculator(first);
     Assert.AreEqual(expected, result, 0.0001);
 }