@@ -0,0 +1,294 @@
+package org.jsmpp.util;%0A%0A%0Aimport static org.testng.Assert.assertEquals;%0Aimport org.testng.annotations.Test;%0A%0A%0Apublic class HexUtilTest %7B%0A%09%0A%09@Test%0A%09public void testEncode()%0A%09%7B%0A%09%09String res = HexUtil.convertStringToHexString(%22hello world%22);%0A%09%09%0A%09%09assertEquals(%2268656c6c6f20776f726c64%22, res);%0A%09%7D%0A%7D%0A

Add minor unit tests for HexUtil