-testfailure aptget install ./foo.deb
-testsuccess grep '^E: Sub-process Popen returned an error code' rootdir/tmp/testfailure.output
-testequal "E: Encountered a section with no Package: header
+testfailuremsg "E: Sub-process Popen returned an error code (2)
+E: Encountered a section with no Package: header