public void TestListNegativeEntries()
        {
            IPhonebookRepository numberBook = new PhonebookHostRepository();
            string[] numbers = new string[]{
            "0899 777 235",
            "02 / 981 11 11",
            };

            var actual = numberBook.List(-1, 2);

            var expected = numberBook.List(1, 2);

            Assert.AreNotEqual(expected, actual);
        }
        public void TestListTooManyEntries()
        {
            IPhonebookRepository numberBook = new PhonebookHostRepository();

            var actual = numberBook.List(1, 2000);

            var expected = numberBook.List(1, 2);

            Assert.AreNotEqual(expected, actual);
        }