public void AsynchWorkerCallbackShouldReturnZeroIfZeroRange()
        {
            var expectedOutput = 0ul;
            var asynchImpl = new AsynchFibonacciWorker(0);

            asynchImpl.AsynchWorkerCallback();

            Assert.AreEqual(expectedOutput, asynchImpl.CalculatedFibonacciNumber);
        }
        public void AsynchWorkerCallbackShouldReturn9720516145911357709If5000Range()
        {
            var expectedOutput = 9720516145911357709ul;
            var asynchImpl = new AsynchFibonacciWorker(5000);

            asynchImpl.AsynchWorkerCallback();

            Assert.AreEqual(expectedOutput, asynchImpl.CalculatedFibonacciNumber);
        }