+testfailureequal 'E: The update command takes no arguments' apt update -q arguments
+
+testsuccessequal "1 package can be upgraded. Run 'apt list --upgradable' to see it." apt update -q
+
+cp dpkg.status rootdir/var/lib/dpkg/status
+insertinstalledpackage 'foo' 'all' '2.0'
+testsuccessequal 'All packages are up to date.' apt update -q