add: HOTP module test

test/hotp_test.js

@@ -0,0 +1,20 @@
+var hotp = require('../lib/hotp');
+var assert = require('assert');
+
+describe('HOTP module test', function() {
+
+    var HOTP = hotp.HOTP;
+    var a = new HOTP("BASE32_ENCODED_SECRET");
+    
+    describe('at() function', function() {
+        it("should print 'HOTP.at'", function() {
+            assert.equal("HOTP.at", a.at());
+        });
+    });
+
+    describe('verify() function', function() {
+        it("should print 'HOTP.verify'", function() {
+            assert.equal("HOTP.verify", a.verify());
+        })
+    })
+});