Fix test suite to halt script if assertion fails.
Fix test suite to halt script if assertion fails.

Ignore-this: ed776ca0c26464dc19cd266b0040ede6

darcs-hash:20131005233625-4d2ae-1449d9b94bf7fb9da4df123fdd660d1233a1e230

johntyree/HsQML,johntyree/HsQML