diff --git a/src/_DataStructures_/Trees/Trie/total-words-in-trie/total-words-in-trie.test.js b/src/_DataStructures_/Trees/Trie/total-words-in-trie/total-words-in-trie.test.js
new file mode 100644
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+++ b/src/_DataStructures_/Trees/Trie/total-words-in-trie/total-words-in-trie.test.js
@@ -0,0 +1,35 @@
+const totalWordsInTrie = require('./index')
+const Trie = require('../index');
+const assert = require('assert');
+
+describe('Data Structure : Trie', () => {
+  it('Should be class of type Trie', () => {
+    assert.equal(typeof Trie.prototype.constructor, 'function');
+    // expect(typeof Trie.prototype.constructor).toEqual('function');
+  });
+
+  describe('Trie', () => {
+
+    it('Should return 6.', () => {
+      let newTrie = new Trie();
+      const words = ['bed', 'ball', 'apple', 'java', 'javascript', 'bed'];
+      words.forEach(word => newTrie.insert(word));
+      result = totalWordsInTrie.totalWords(newTrie.root);
+      assert.equal(result, 6);
+    });
+
+    it('Should return 0.', () => {
+      let newTrie = new Trie();
+      result = totalWordsInTrie.totalWords(newTrie.root);
+      assert.equal(result, 0);
+    });
+
+    it('Should return 6.', () => {
+      let newTrie = new Trie();
+      const words = ['bed', 'ball','', 'apple', 'java', 'javascript', 'bed'];
+      words.forEach(word => newTrie.insert(word));
+      result = totalWordsInTrie.totalWords(newTrie.root);
+      assert.equal(result, 6);
+    });
+  });
+});