public void KeyProvider_CallingKeyTwice_ReturnsNewKeyEachTime()
        {
            var provider = new KeyProvider();

            var key1 = provider.Key();
            var key2 = provider.Key();

            Assert.AreNotEqual(key1, key2);
        }
        public void KeyProvider_Key_ReturnsKey()
        {
            var provider = new KeyProvider();

            var key = provider.Key();
        }