ping6: add a basic functional test

Submitted by:	Ján Sučan <sucanjan@gmail.com>
MFC after:	2 weeks
Sponsored by:	Google, inc. (Google Summer of Code 2019)
Differential Revision:	https://reviews.freebsd.org/D21292

etc/mtree/BSD.tests.dist

@@ -442,6 +442,8 @@
         ..
         ping
         ..
+        ping6
+        ..
     ..
     secure
         lib

sbin/ping6/Makefile

@@ -21,4 +21,7 @@ LIBADD+=	cap_dns
 CFLAGS+=-DWITH_CASPER
 .endif
 
+HAS_TESTS=
+SUBDIR.${MK_TESTS}+= tests
+
 .include <bsd.prog.mk>

sbin/ping6/tests/Makefile

@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+PACKAGE= tests
+
+ATF_TESTS_SH+=	ping6_test
+${PACKAGE}FILES+= ping6_c1_s8_X1.out
+
+.include <bsd.test.mk>

sbin/ping6/tests/ping6_c1_s8_X1.out

@@ -0,0 +1,6 @@
+PING6(56=40+8+8 bytes) ::1 --> ::1
+16 bytes from ::1, icmp_seq=0 hlim= time= ms
+
+--- localhost ping6 statistics ---
+1 packets transmitted, 1 packets received, 0.0% packet loss
+round-trip min/avg/max/std-dev = /// ms

sbin/ping6/tests/ping6_test.sh

@@ -0,0 +1,53 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (C) 2019 Jan Sucan <jansucan@FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+
+atf_test_case ping6_c1_s8_X1
+ping6_c1_s8_X1_head() {
+    atf_set "descr" "Stop after receiving 1 ECHO_RESPONSE packet"
+}
+ping6_c1_s8_X1_body() {
+    if ! getaddrinfo -f inet6 localhost 1>/dev/null 2>&1; then
+	atf_skip "IPv6 is not configured"
+    fi
+    atf_check -s exit:0 -o save:std.out -e empty \
+	      ping6 -c 1 -s 8 -X 1 localhost
+    check_ping_statistics std.out $(atf_get_srcdir)/ping6_c1_s8_X1.out
+}
+
+atf_init_test_cases() {
+    atf_add_test_case ping6_c1_s8_X1
+}
+
+check_ping_statistics() {
+    sed -e 's/0.[0-9]\{3\}//g' \
+	-e 's/[1-9][0-9]*.[0-9]\{3\}//g' \
+	-e 's/hlim=[0-9][0-9]*/hlim=/' \
+	"$1" >"$1".filtered
+    atf_check -s exit:0 diff -u "$1".filtered "$2"
+}