diff --git a/lib/nodejs/test/test-cases.mjs b/lib/nodejs/test/test-cases.mjs
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+/*
+ * 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.
+ */
+
+"use strict";
+
+import helpers from "./helpers.js";
+import Int64 from "node-int64";
+
+const ttypes = await helpers.importTypes(`ThriftTest_types`);
+
+//all Languages in UTF-8
+/*jshint -W100 */
+export const stringTest =
+  "Afrikaans, Alemannisch, Aragonés, العربية, مصرى, " +
+  "Asturianu, Aymar aru, Azərbaycan, Башҡорт, Boarisch, Žemaitėška, " +
+  "Беларуская, Беларуская (тарашкевіца), Български, Bamanankan, " +
+  "বাংলা, Brezhoneg, Bosanski, Català, Mìng-dĕ̤ng-ngṳ̄, Нохчийн, " +
+  "Cebuano, ᏣᎳᎩ, Česky, Словѣ́ньскъ / ⰔⰎⰑⰂⰡⰐⰠⰔⰍⰟ, Чӑвашла, Cymraeg, " +
+  "Dansk, Zazaki, ދިވެހިބަސް, Ελληνικά, Emiliàn e rumagnòl, English, " +
+  "Esperanto, Español, Eesti, Euskara, فارسی, Suomi, Võro, Føroyskt, " +
+  "Français, Arpetan, Furlan, Frysk, Gaeilge, 贛語, Gàidhlig, Galego, " +
+  "Avañe'ẽ, ગુજરાતી, Gaelg, עברית, हिन्दी, Fiji Hindi, Hrvatski, " +
+  "Kreyòl ayisyen, Magyar, Հայերեն, Interlingua, Bahasa Indonesia, " +
+  "Ilokano, Ido, Íslenska, Italiano, 日本語, Lojban, Basa Jawa, " +
+  "ქართული, Kongo, Kalaallisut, ಕನ್ನಡ, 한국어, Къарачай-Малкъар, " +
+  "Ripoarisch, Kurdî, Коми, Kernewek, Кыргызча, Latina, Ladino, " +
+  "Lëtzebuergesch, Limburgs, Lingála, ລາວ, Lietuvių, Latviešu, Basa " +
+  "Banyumasan, Malagasy, Македонски, മലയാളം, मराठी, مازِرونی, Bahasa " +
+  "Melayu, Nnapulitano, Nedersaksisch, नेपाल भाषा, Nederlands, ‪" +
+  "Norsk (nynorsk)‬, ‪Norsk (bokmål)‬, Nouormand, Diné bizaad, " +
+  "Occitan, Иронау, Papiamentu, Deitsch, Polski, پنجابی, پښتو, " +
+  "Norfuk / Pitkern, Português, Runa Simi, Rumantsch, Romani, Română, " +
+  "Русский, Саха тыла, Sardu, Sicilianu, Scots, Sámegiella, Simple " +
+  "English, Slovenčina, Slovenščina, Српски / Srpski, Seeltersk, " +
+  "Svenska, Kiswahili, தமிழ், తెలుగు, Тоҷикӣ, ไทย, Türkmençe, Tagalog, " +
+  "Türkçe, Татарча/Tatarça, Українська, اردو, Tiếng Việt, Volapük, " +
+  "Walon, Winaray, 吴语, isiXhosa, ייִדיש, Yorùbá, Zeêuws, 中文, " +
+  "Bân-lâm-gú, 粵語";
+/*jshint +W100 */
+
+export const specialCharacters =
+  'quote: " backslash:' +
+  " forwardslash-escaped: / " +
+  " backspace: \b formfeed: \f newline: \n return: \r tab: " +
+  ' now-all-of-them-together: "\\/\b\n\r\t' +
+  " now-a-bunch-of-junk: !@#$%&()(&%$#{}{}<><><" +
+  ' char-to-test-json-parsing: ]] "]] \\" }}}{ [[[ ';
+
+export const mapTestInput = {
+  a: "123",
+  "a b": "with spaces ",
+  same: "same",
+  0: "numeric key",
+  longValue: stringTest,
+  stringTest: "long key",
+};
+
+export const simple = [
+  ["testVoid", undefined],
+  ["testString", "Test"],
+  ["testString", ""],
+  ["testString", stringTest],
+  ["testString", specialCharacters],
+  ["testBool", true],
+  ["testBool", false],
+  ["testByte", 1],
+  ["testByte", 0],
+  ["testByte", -1],
+  ["testByte", -127],
+  ["testI32", -1],
+  ["testDouble", -5.2098523],
+  ["testDouble", 7.012052175215044],
+  ["testEnum", ttypes.Numberz.ONE],
+  ["testI64", 5],
+  ["testI64", -5],
+  ["testI64", 734359738368],
+  ["testI64", -734359738368],
+  ["testI64", new Int64(new Buffer([0, 0x20, 0, 0, 0, 0, 0, 1]))], // 2^53+1
+  [
+    "testI64",
+    new Int64(new Buffer([0xff, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff])),
+  ], // -2^53-1
+  ["testTypedef", 69],
+];
+
+const mapout = {};
+for (let i = 0; i < 5; ++i) {
+  mapout[i] = i - 10;
+}
+
+export const deep = [
+  [
+    "testList",
+    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20],
+  ],
+];
+
+export const deepUnordered = [
+  ["testMap", mapout],
+  ["testSet", [1, 2, 3]],
+  ["testStringMap", mapTestInput],
+];
+
+export const out = new ttypes.Xtruct({
+  string_thing: "Zero",
+  byte_thing: 1,
+  i32_thing: -3,
+  i64_thing: 1000000,
+});
+
+export const out2 = new ttypes.Xtruct2();
+out2.byte_thing = 1;
+out2.struct_thing = out;
+out2.i32_thing = 5;
+
+export const crazy = new ttypes.Insanity({
+  userMap: { 5: 5, 8: 8 },
+  xtructs: [
+    new ttypes.Xtruct({
+      string_thing: "Goodbye4",
+      byte_thing: 4,
+      i32_thing: 4,
+      i64_thing: 4,
+    }),
+    new ttypes.Xtruct({
+      string_thing: "Hello2",
+      byte_thing: 2,
+      i32_thing: 2,
+      i64_thing: 2,
+    }),
+  ],
+});
+
+export const crazy2 = new ttypes.Insanity({
+  userMap: { 5: 5, 8: 8 },
+  xtructs: [
+    {
+      string_thing: "Goodbye4",
+      byte_thing: 4,
+      i32_thing: 4,
+      i64_thing: 4,
+    },
+    {
+      string_thing: "Hello2",
+      byte_thing: 2,
+      i32_thing: 2,
+      i64_thing: 2,
+    },
+  ],
+});
+
+export const insanity = {
+  1: { 2: crazy, 3: crazy },
+  2: { 6: { userMap: {}, xtructs: [] } },
+};