Here is how you can verify it using Tester.AssertContains. Its 3rd parameter substr may accept regular expression when it has prefix regex:
i.e.:
Another way for wildcard comparison is use of the StringChecker, which is a part of Useful Page Objects. It has several pattern comparison functions (compare using regular expression, compare using pattern, compare with list etc):
And one more way is to use Text.Contains:
One more way is to write a JavaScript function and call it from RVL. It may do any advanced validation.