testbench add test for mangle_qi

see also https://github.com/rsyslog/rsyslog/issues/3072

tests/Makefile.am

@@ -60,6 +60,7 @@ TESTS +=  \
 	empty-hostname.sh \
 	hostname-getaddrinfo-fail.sh \
 	msleep_usage_output.sh \
+	mangle_qi_usage_output.sh \
 	test_id_usage_output.sh \
 	prop-programname.sh \
 	prop-programname-with-slashes.sh \
@@ -1239,6 +1240,7 @@ EXTRA_DIST= \
 	mmutf8fix_no_error.sh \
 	tcpflood_wrong_option_output.sh \
 	msleep_usage_output.sh \
+	mangle_qi_usage_output.sh \
 	test_id_usage_output.sh \
 	mmanon_with_debug.sh \
 	mmanon_random_32_ipv4.sh \

tests/mangle_qi_usage_output.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# add 2018-11-13 by Jan Gerhards, released under ASL 2.0
+
+. ${srcdir:=.}/diag.sh init
+
+./mangle_qi &> $RSYSLOG_DYNNAME.output
+grep -q -- "-q option MUST be specified" $RSYSLOG_DYNNAME.output 
+
+if [ ! $? -eq 0 ]; then
+  echo "invalid response generated"
+  error_exit  1
+fi;
+
+exit_test