Expect with tcltest?

I have just read up tcltest. I'm wondering if tcltest is useful to be used together with Expect. For example, Expect is used to remote login and run some commands and tcltest can do the pattern matching and result reporting. Are there any benefits in doing it this way? Or, perhaps there is no value to use tcltest with Expect?

BTW, in tcltest, is there a way to test something you don't expect to see. For example, you don't want to see "Fault" or "Error"?

/Why Tea
.