Replace main method with the same in test

mq/main/mq-ums/src/main/java/com/sun/messaging/ums/service/SecuredSid.java

@@ -232,39 +232,4 @@ public static String decode(String encodedString) throws JMSException {
             throw jmse;
         }
     }
-
-    public static void main(String[] args) throws Exception {
-
-        SecuredSid ssid = new SecuredSid();
-
-        for (int i = 0; i < 1; i++) {
-            String sid = ssid.nextSid();
-            System.out.println("**** sid = " + sid);
-
-            // sid = sid + 1;
-            // sid = 1 + sid;
-
-            // int index = sid.indexOf('-');
-
-            // get sequence
-            // String sequence = sid.substring(0, index);
-
-            // index ++;
-
-            // get signature string - base 64
-            // String sigstr = sid.substring(index);
-
-            // sigstr = 1+sigstr;
-
-            // String badsid = sequence + "-" + sigstr;
-
-            // ssid.verifySid(sid);
-            // ssid.verifySid(badsid);
-
-            // Thread.sleep (100);
-            // System.out.println ("**** sid verified, sid= " + sid);
-        }
-
-    }
-
 }

mq/main/mq-ums/src/test/java/com/sun/messaging/ums/service/SecuredSidTest.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2022 Contributors to Eclipse Foundation. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package com.sun.messaging.ums.service;
+
+import org.junit.jupiter.api.Test;
+
+import jakarta.jms.JMSException;
+
+class SecuredSidTest {
+
+    @Test
+    void testInsteadOfMain() throws JMSException {
+        SecuredSid ssid = new SecuredSid();
+
+        for (int i = 0; i < 1; i++) {
+            String sid = ssid.nextSid();
+            System.out.println("**** sid = " + sid);
+
+            // sid = sid + 1;
+            // sid = 1 + sid;
+
+            // int index = sid.indexOf('-');
+
+            // get sequence
+            // String sequence = sid.substring(0, index);
+
+            // index ++;
+
+            // get signature string - base 64
+            // String sigstr = sid.substring(index);
+
+            // sigstr = 1+sigstr;
+
+            // String badsid = sequence + "-" + sigstr;
+
+            // ssid.verifySid(sid);
+            // ssid.verifySid(badsid);
+
+            // Thread.sleep (100);
+            // System.out.println ("**** sid verified, sid= " + sid);
+        }
+    }
+}