ping: 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/D21289

sbin/ping/tests/Makefile

@@ -5,4 +5,9 @@ WARNS?=	6
 ATF_TESTS_C+=	in_cksum_test
 SRCS.in_cksum_test= in_cksum_test.c ../utils.c
 
+PACKAGE= tests
+
+ATF_TESTS_SH+=	ping_test
+${PACKAGE}FILES+= ping_c1_s56_t1.out
+
 .include <bsd.test.mk>

sbin/ping/tests/ping_c1_s56_t1.out

@@ -0,0 +1,6 @@
+PING localhost: 56 data bytes
+64 bytes from localhost: icmp_seq=0 ttl= time= ms
+
+--- localhost ping statistics ---
+1 packets transmitted, 1 packets received, 0.0% packet loss
+round-trip min/avg/max/stddev = /// ms

sbin/ping/tests/ping_test.sh

@@ -0,0 +1,55 @@
+#
+# 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 ping_c1_s56_t1
+ping_c1_s56_t1_head() {
+    atf_set "descr" "Stop after receiving 1 ECHO_RESPONSE packet"
+}
+ping_c1_s56_t1_body() {
+    if ! getaddrinfo -f inet localhost 1>/dev/null 2>&1; then
+	atf_skip "IPv4 is not configured"
+    fi
+    atf_check -s exit:0 -o save:std.out -e empty \
+	      ping -c 1 -s 56 -t 1 localhost
+    check_ping_statistics std.out $(atf_get_srcdir)/ping_c1_s56_t1.out
+}
+
+atf_init_test_cases() {
+    atf_add_test_case ping_c1_s56_t1
+}
+
+check_ping_statistics() {
+    sed -e 's/0.[0-9]\{3\}//g' \
+	-e 's/[1-9][0-9]*.[0-9]\{3\}//g' \
+	-e 's/localhost ([0-9]\{1,3\}\(\.[0-9]\{1,3\}\)\{1,3\})/localhost/' \
+	-e 's/from [0-9]\{1,3\}\(\.[0-9]\{1,3\}\)\{1,3\}/from/' \
+	-e 's/ttl=[0-9][0-9]*/ttl=/' \
+	"$1" >"$1".filtered
+    atf_check -s exit:0 diff -u "$1".filtered "$2"
+}