diff --git a/lib/js/test/test-double-rendering.html b/lib/js/test/test-double-rendering.html
new file mode 100644
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+++ b/lib/js/test/test-double-rendering.html
@@ -0,0 +1,55 @@
++<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements. See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership. The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License. You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+      <title>Rendering Double Constants in JS: Unit Test</title>
+
+      <script src="build/js/thrift.js"         type="text/javascript" charset="utf-8"></script>
+      <script src="gen-js/ThriftTest_types.js" type="text/javascript" charset="utf-8"></script>
+      <script src="gen-js/ThriftTest.js"       type="text/javascript" charset="utf-8"></script>
+      <!-- double constants to check -->
+      <script src="gen-js/DoubleConstantsTest_types.js"         type="text/javascript" charset="utf-8"></script>
+
+      <!-- jQuery -->
+      <script type="text/javascript" src="../node_modules/jquery/dist/jquery.js" charset="utf-8"></script>
+
+      <!-- QUnit Test framework-->
+      <script type="text/javascript" src="../node_modules/qunit/qunit/qunit.js" charset="utf-8"></script>
+      <link rel="stylesheet" href="../node_modules/qunit/qunit/qunit.css" type="text/css" media="screen" />
+
+      <!-- the Test Suite-->
+      <script type="text/javascript" src="test-double-rendering.js" charset="utf-8"></script>
+    </head>
+<body>
+  <h1 id="qunit-header">Rendering Double Constants in JS: Unit Test</h1>
+  <h2 id="qunit-banner"></h2>
+  <div id="qunit-testrunner-toolbar"></div>
+  <h2 id="qunit-userAgent"></h2>
+  <ol id="qunit-tests"><li><!-- get valid xhtml strict--></li></ol>
+  <!-- Uncomment this to check the validity. This significantly slows down the test.
+  <p>
+      <a href="http://validator.w3.org/check/referer"><img
+          src="http://www.w3.org/Icons/valid-xhtml10"
+          alt="Valid XHTML 1.0!" height="31" width="88" /></a>
+  </p>
+  -->
+</body>
+</html>