Add test cases for HOTP

Makefile

@@ -32,6 +32,9 @@ otpcli: ${OBJ}
 clean:
 	rm -f otpcli ${OBJ} ${P}-${V}.tgz
 
+test: all run-tests.sh
+	sh ./run-tests.sh
+
 dist: clean
 	pax -w -s '#^#${P}-${V}/#' ${DIST_FILES} | gzip >${P}-${V}.tgz
 

run-tests.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# otpcli - command-line interface for HOTP and TOTP
+#
+# Written in 2020 by Lucas
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication
+# along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+_test_rc=0
+_test_nr=0
+
+case_eq()
+{
+	_test_nr=$((_test_nr + 1))
+
+	expected=$1
+	shift
+
+	got=$("$@")
+	if [ "$got" != "$expected" ]; then
+		printf "test %u: expected %s, got %s\n" \
+		    "$_test_nr" "$expected" "$got" >&2
+		_test_rc=1
+	fi
+}
+
+HOTP_SECRET="12345678901234567890"
+
+case_eq 755224 ./otpcli -H 0 "$HOTP_SECRET"
+case_eq 287082 ./otpcli -H 1 "$HOTP_SECRET"
+case_eq 359152 ./otpcli -H 2 "$HOTP_SECRET"
+case_eq 969429 ./otpcli -H 3 "$HOTP_SECRET"
+case_eq 338314 ./otpcli -H 4 "$HOTP_SECRET"
+case_eq 254676 ./otpcli -H 5 "$HOTP_SECRET"
+case_eq 287922 ./otpcli -H 6 "$HOTP_SECRET"
+case_eq 162583 ./otpcli -H 7 "$HOTP_SECRET"
+case_eq 399871 ./otpcli -H 8 "$HOTP_SECRET"
+case_eq 520489 ./otpcli -H 9 "$HOTP_SECRET"
+
+if [ $_test_rc -eq 0 ]; then
+	printf "All %u tests completed successfully!\n" "$_test_nr" >&2
+else
+	printf "Some tests failed\n" >&2
+fi
+exit $_test_rc