add test

.gitignore

@@ -1,2 +1,4 @@
 /node_modules/
 /dist/
+/.nyc_output/
+/coverage/

test/index.js

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * Created by Timo Hocker <timo@scode.ovh>, March 2020
+ */
+
+// @ts-nocheck
+'use strict';
+
+const test = require ('ava');
+const encoding = require ('../index');
+
+
+test ('encoding to_hex', (t) => {
+  const hex = encoding.to_hex ('foo');
+  t.is (hex, '666f6f');
+});
+
+test ('encoding to_b64', (t) => {
+  const hex = encoding.to_b64 ('foo');
+  t.is (hex, 'Zm9v');
+});
+
+test ('encoding to_utf8', (t) => {
+  const utf = encoding.to_utf8 ('Zm9v', 'base64');
+  t.is (utf, 'foo');
+});