By clicking the Execute Testcase button you will have the data resulting from a testcase. Reading this data you will be able to enter assertions in this text box your assertions. Supported Syntax is :
All Xpath expressions below assert ok must match to have this test to be a success.
One Xpath expressions below assert nok must match to have this test to be a failure.

You can test you assertions by clicking the Validate XPath button. The test result will display beneath this text box.