public async Task when_hash_incorrect_check_hash_should_be_true()
        {
            const string textToHash = "some text of mine";
            var hasher = new Hasher();

            var hash = hasher.Hash(textToHash);

            Assert.IsFalse(hasher.CheckHash("some other text", hash));
        }
        public async Task hash_should_generate_random_salt()
        {
            const string textToHash = "some text of mine";
            var hasher = new Hasher();

            var hash1 = hasher.Hash(textToHash);
            Assert.IsTrue(hash1.Length > 1);

            var hash2 = hasher.Hash(textToHash);

            Assert.AreNotEqual(hash1, hash2);
        }