public void TestSimpleGenerator_GeneratePrime()
        {
            var optimizedGenerator = new SimplePrimeGenerator();

            //Create a cancellation token for stopping the prime number generation task.
            var tokenSource = new CancellationTokenSource();
            CancellationToken cancellationToken = tokenSource.Token;

            var limit      = (uint)PRIME_NUMBERS[PRIME_NUMBERS.Length - 1];
            var resultList = optimizedGenerator.GeneratePrime(limit, cancellationToken);

            tokenSource.Dispose();

            Assert.IsTrue(resultList != null);

            var results = resultList.ToArray();

            //check if the number of prime numbers are the same.
            Assert.IsTrue(results.Length == PRIME_NUMBERS.Length);

            //check if every prime number are the same.
            for (int i = 0; i < PRIME_NUMBERS.Length; ++i)
            {
                Assert.IsTrue(results[i] == PRIME_NUMBERS[i]);
            }
        }
        public void TestBothGenerators_GeneratePrime()
        {
            var simplePrimeGenerator = new SimplePrimeGenerator();
            var optimizedGenerator   = new OptimizedGenerator();

            //Create a cancellation token for stopping the prime number generation task.
            var tokenSource = new CancellationTokenSource();
            CancellationToken cancellationToken = tokenSource.Token;
            var tasks = new ConcurrentBag <Task>();

            //Test for some prime numbers and compare these with a know prime number list.
            var limit = (uint)PRIME_NUMBERS[PRIME_NUMBERS.Length - 1];
            var task1 = Task.Factory.StartNew(() => simplePrimeGenerator.GeneratePrime(limit, cancellationToken), cancellationToken);
            var task2 = Task.Factory.StartNew(() => optimizedGenerator.GeneratePrime(limit, cancellationToken), cancellationToken);

            tasks.Add(task1);
            tasks.Add(task2);

            //wait until all tasks are completed
            Task.WhenAll(tasks.ToArray());
            tokenSource.Dispose();

            //check if the task is not null
            Assert.IsTrue(task1 != null);
            Assert.IsTrue(task2 != null);

            var results1 = task1.Result.ToArray();
            var results2 = task2.Result.ToArray();

            //check if the number of prime numbers are the same.
            Assert.IsTrue(results1.Length == PRIME_NUMBERS.Length);
            Assert.IsTrue(results2.Length == PRIME_NUMBERS.Length);

            //check if every prime number are the same.
            for (int i = 0; i < PRIME_NUMBERS.Length; ++i)
            {
                Assert.IsTrue(results1[i] == PRIME_NUMBERS[i]);
                Assert.IsTrue(results2[i] == PRIME_NUMBERS[i]);
            }
        }