Add javascript test.

test/javascript/get.js

@@ -0,0 +1,23 @@
+const assert = require('assert');
+const OpenapiIplocation = require('openapi_iplocation');
+const api = new OpenapiIplocation.DefaultApi();
+
+describe('iplocation get', function() {
+  describe('json format', function() {
+    it('should return a JSON payload', function(done) {
+      const ip = '8.8.8.8';
+      const opts = {
+        'format': 'json'
+      };
+      var callback = function(error, data, response) {
+        if (error) {
+          console.error(error);
+          assert.fail();
+        } else {
+          console.log('Data: ' + data);
+        }
+      };
+      api.rootGet(ip, opts, callback);
+    });
+  });
+});