public void Test_AverageByMedian()
        {
            IAvaragingMethod method = new MedianAvaragingMethod();

            double expected = 8.0;

            double actual = method.CalculateAvarage(values);

            Assert.AreEqual(expected, actual, 0.000001);
        }
        public void Test_AverageByMedian_Exception()
        {
            IAvaragingMethod method = new MedianAvaragingMethod();

            Assert.Throws <ArgumentNullException>(() => method.CalculateAvarage(null));
        }