Description
When testing Form#findSubmittingButton() does not behave correctly, because the submitting component is not set in the FormTester. Because of this the behavior in test and at runtime is not the same. This bug is new to Wicket 6. In Wicket 4 the test worked as expected.
There was some discussion on this topic in this thread: http://apache-wicket.1842946.n4.nabble.com/AjaxRequestAttributes-setSubmittingComponentName-td4655895.html