public async void GetSpecialTest()
        {
            NumericSequenceCalculatorAPIController nscApiController = new NumericSequenceCalculatorAPIController();

            var expected = new List<string> { "Z", "1", "2", "C", "4", "E", "C", "7" };
            var result = await nscApiController.GetSpecial(7) as ICollection<string>;
            CollectionAssert.AreEqual(expected, (List<string>)result);
        }
 public async void SecurityVerification2Test()
 {
     NumericSequenceCalculatorAPIController nscApiController = new NumericSequenceCalculatorAPIController();
     
     var expected = new List<string> { "0", "1", "2", "3", "4", "5", "6", "7" };
     var result = await nscApiController.SecurityVerification(expected) as ICollection<string>;
     CollectionAssert.AreEqual(expected, (List<string>)result);
 }
        public async void GetFibonacciTest()
        {
            NumericSequenceCalculatorAPIController nscApiController = new NumericSequenceCalculatorAPIController();

            var expected = new List<string> { "0", "1", "1", "2", "3", "5" };
            var result = await nscApiController.GetFibonacci(7) as ICollection<string>;
            CollectionAssert.AreEqual(expected, (List<string>)result);
        }
 public async void SecurityVerification1Test()
 {
     NumericSequenceCalculatorAPIController nscApiController = new NumericSequenceCalculatorAPIController();
     Assert.AreEqual(null, await nscApiController.SecurityVerification(null));
 }