In EAP 7.1.0 release notes chapter_ New Features and Enhancements_ there is following description of Test a Datasource Connection Using the Management Console feature:
"
When using the Create Datasource wizard in the management console, you have the opportunity to test the connection before creating the datasource. On the Test Connection screen of the wizard, click the Test Connection button.
Once a datasource has been added, you can test the connection by navigating to Configuration → Subsystems → Datasources, selecting the appropriate type and datasource, and selecting Test Connection from the drop down.
"
but the subject of EAP7-489 - the new feature - is just the test connection page in the wizard, the second part - Test Connection drop down menu item on datasource was already implemented in EAP 7.0 so I would suggest reword the title of the feature to

Test a Datasource Connection Using the Create Datasource Wizard in the Management Console

and to remove the second part of the feature description so it will be
"
When using the Create Datasource wizard in the management console, you have the opportunity to test the connection before creating the datasource. On the Test Connection screen of the wizard, click the Test Connection button.
"