diff --git a/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/WechatWorkUtilityTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/WechatWorkUtilityTests.cs
new file mode 100644
index 00000000..67450212
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/WechatWorkUtilityTests.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace SKIT.FlurlHttpClient.Wechat.Work.UnitTests
+{
+    public class WechatWorkUtilityTests
+    {
+        [Fact(DisplayName = "回调信息解析")]
+        public void WxBizMsgCryptorParsingTest()
+        {
+            string xml = "<xml><ToUserName><![CDATA[wx5823bf96d3bd56c7]]></ToUserName><Encrypt><![CDATA[RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==]]></Encrypt><AgentID><![CDATA[218]]></AgentID></xml>";
+
+            bool isValidXml = Utilities.WxBizMsgCryptor.TryParseXml(xml, out string toUserName, out string agentId, out string encryptedMsg);
+            Assert.True(isValidXml);
+            Assert.Equal("wx5823bf96d3bd56c7", toUserName);
+            Assert.Equal("218", agentId);
+            Assert.Equal("RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==", encryptedMsg);
+        }
+
+        [Fact(DisplayName = "回调信息验签")]
+        public void WxBizMsgCryptorSignatureTest()
+        {
+            string token = "QDG6eK";
+            string timestamp = "1409659813";
+            string nonce = "1372623149";
+            string cipherText = "RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==";
+
+            string actualSignText = Utilities.WxBizMsgCryptor.GenerateSignature(sToken: token, sTimestamp: timestamp, sNonce: nonce, sMsgEncrypt: cipherText);
+            string expectdSignText = "477715d11cdb4164915debcba66cb864d751f3e6";
+
+            Assert.Equal(expectdSignText, actualSignText, ignoreCase: true);
+            Assert.True(Utilities.WxBizMsgCryptor.VerifySignature(sToken: token, sTimestamp: timestamp, sNonce: nonce, sMsgEncrypt: cipherText, sMsgSign: expectdSignText));
+        }
+
+        [Fact(DisplayName = "回调信息解密")]
+        public void WxBizMsgCryptorDecryptTest()
+        {
+            string corpId = "wx5823bf96d3bd56c7";
+            string encodingAESKey = "jWmYm7qr5nMoAUwZRjGtBxmz3KA1tkAj3ykkR6q2B2C";
+            string cipherText = "RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==";
+
+            string actualCipherText = Utilities.WxBizMsgCryptor.AESDecrypt(cipherText, encodingAESKey, out string actualCorpId);
+            string expectdCipherText = "<xml><ToUserName><![CDATA[wx5823bf96d3bd56c7]]></ToUserName>\n<FromUserName><![CDATA[mycreate]]></FromUserName>\n<CreateTime>1409659813</CreateTime>\n<MsgType><![CDATA[text]]></MsgType>\n<Content><![CDATA[hello]]></Content>\n<MsgId>4561255354251345929</MsgId>\n<AgentID>218</AgentID>\n</xml>";
+
+            Assert.Equal(corpId, actualCorpId);
+            Assert.Equal(expectdCipherText, actualCipherText, ignoreCase: true);
+        }
+    }
+}