public static void EuclidsAlgorithmTest_Numbers_ArgumentNullException(params int[] numbers)
 => Assert.Throws <ArgumentNullException>(() => GreatestCommonDivisor.BinaryEuclideanAlgoritm(numbers));
 public static void EuclidsAlgorithmTest(int expected, int a, int b)
 {
     Assert.AreEqual(expected, GreatestCommonDivisor.BinaryEuclideanAlgoritm(a, b));
 }