public void EmptyArguments(string word1, string word2)
        {
            IAnagramChecker anagramChecker = new AnagramChecker();

            Assert.Throws <ArgumentException>(() => anagramChecker.IsAnagram(word1, word2));
        }
        public void IsNotAnagram(string word1, string word2)
        {
            IAnagramChecker anagramChecker = new AnagramChecker();

            Assert.IsFalse(anagramChecker.IsAnagram(word1, word2));
        }