add doc version test

test/docs.js

@@ -0,0 +1,18 @@
+'use strict';
+
+/* jshint maxstatements: 30 */
+
+var chai = require('chai');
+var should = chai.should();
+var expect = chai.expect;
+
+var bitcore = require('..');
+
+describe('Address', function() {
+
+  it('should throw an error because of bad network param', function() {
+    (function(){
+      return new Address(PKHLivenet[0], 'main', 'pubkeyhash');
+    }).should.throw('Second argument must be "livenet" or "testnet".');
+  });
+});