public void Clear()
        {
            var trie = new TrieDictionary <char, bool> {
                { "ABC", false }, { "AB", false }, { "ADE", false }, { "ABCDE", false }
            };

            trie.Clear();

            Assert.AreEqual(0, trie.Count);
        }
        public void ContainsKeyClear()
        {
            var trie = new TrieDictionary <char, bool> {
                { "ABC", false }, { "AB", false }, { "ADE", false }, { "ABCDE", false }
            };

            trie.Clear();

            Assert.IsFalse(trie.ContainsKey("ABC"));
            Assert.IsFalse(trie.ContainsKey("AB"));
            Assert.IsFalse(trie.ContainsKey("ADE"));
            Assert.IsFalse(trie.ContainsKey("ABCDE"));
        }