t_shift.sh revision 313498
1# $NetBSD: t_shift.sh,v 1.2 2016/05/17 09:05:14 kre Exp $
2#
3# Copyright (c) 2016 The NetBSD Foundation, Inc.
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
16# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
19# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25# POSSIBILITY OF SUCH DAMAGE.
26#
27# the implementation of "sh" to test
28: ${TEST_SH:="/bin/sh"}
29
30atf_test_case basic_shift_test
31basic_shift_test_head() {
32	atf_set "descr" "Test correct operation of valid shifts"
33}
34basic_shift_test_body() {
35
36	for a in			\
37	  "one-arg::0:one-arg"		\
38	  "one-arg:1:0:one-arg"		\
39	  "one-arg:0:1 one-arg"		\
40	  "a b c::2 b c:a"		\
41	  "a b c:1:2 b c:a"		\
42	  "a b c:2:1 c:a:b"		\
43	  "a b c:3:0:a:b:c"		\
44	  "a b c:0:3 a b c"		\
45	  "a b c d e f g h i j k l m n o p:1:15 b c d e f g h i j k l m n o p"\
46	  "a b c d e f g h i j k l m n o p:9:7 j k l m n o p:a:b:c:g:h:i"     \
47	  "a b c d e f g h i j k l m n o p:13:3 n o p:a:b:c:d:k:l:m"	      \
48	  "a b c d e f g h i j k l m n o p:16:0:a:b:c:d:e:f:g:h:i:j:k:l:m:n:o:p"
49	do
50		oIFS="${IFS}"
51		IFS=:; set -- $a
52		IFS="${oIFS}"
53
54		init="$1"; n="$2"; res="$3"; shift 3
55
56		not=
57		for b
58		do
59			not="${not} -o not-match:$b"
60		done
61
62		atf_check -s exit:0 -o "match:${res}" ${not} -e empty \
63			${TEST_SH} -c "set -- ${init}; shift $n;"' echo "$# $*"'
64	done
65
66	atf_check -s exit:0 -o match:complete -o not-match:ERR -e empty \
67		${TEST_SH} -c \
68    'set -- a b c d e;while [ $# -gt 0 ];do shift||echo ERR;done;echo complete'
69}
70
71atf_test_case excessive_shift
72excessive_shift_head() {
73	atf_set "descr" "Test acceptable operation of shift too many"
74}
75# In:
76#
77#	http://pubs.opengroup.org/onlinepubs/9699919799
78#		/utilities/V3_chap02.html#tag_18_26_01
79#
80# (that URL should be one line, with the /util... immediately after ...9799)
81#
82# POSIX says of shift (in the "EXIT STATUS" paragraph):
83#
84#  If the n operand is invalid or is greater than "$#", this may be considered
85#  a syntax error and a non-interactive shell may exit; if the shell does not
86#  exit in this case, a non-zero exit status shall be returned.
87#  Otherwise, zero shall be returned.
88#
89# NetBSD's sh treats it as an error and exits (if non-interactive, as here),
90# other shells do not.
91#
92# Either behaviour is acceptable - so the test allows for both
93# (and checks that if the shell does not exit, "shift" returns status != 0)
94
95excessive_shift_body() {
96	for a in				\
97		"one-arg:2"			\
98		"one-arg:4"			\
99		"one-arg:13"			\
100		"one two:3"			\
101		"one two:7"			\
102		"one two three four five:6"	\
103		"I II III IV V VI VII VIII IX X XI XII XIII XIV XV:16"	\
104		"I II III IV V VI VII VIII IX X XI XII XIII XIV XV:17"	\
105		"I II III IV V VI VII VIII IX X XI XII XIII XIV XV:30"	\
106		"I II III IV V VI VII VIII IX X XI XII XIII XIV XV:9999"
107	do
108		oIFS="${IFS}"
109		IFS=:; set -- $a
110		IFS="${oIFS}"
111
112		atf_check -s not-exit:0 -o match:OK -o not-match:ERR \
113			-e ignore ${TEST_SH} -c \
114			"set -- $1 ;"'echo OK:$#-'"$2;shift $2 && echo ERR"
115	done
116}
117
118atf_test_case function_shift
119function_shift_head() {
120	atf_set "descr" "Test that shift in a function does not affect outside"
121}
122function_shift_body() {
123	: # later...
124}
125
126atf_test_case non_numeric_shift
127non_numeric_shift_head() {
128	atf_set "descr" "Test that non-numeric args to shift are detected"
129}
130
131# from the DESCRIPTION section at the URL mentioned with the excessive_shift
132# test:
133#
134#	The value n shall be an unsigned decimal integer ...
135#
136# That is not hex (octal will be treated as if it were decimal, a leading 0
137# will simply be ignored - we test for this by giving an "octal" value that
138# would be OK if parsed as octal, but not if parsed (correctly) as decimal)
139#
140# Obviously total trash like roman numerals or alphabetic strings are out.
141#
142# Also no signed values (no + or -) and not a string that looks kind of like
143# a number,  but only if you're generous
144#
145# But as the EXIT STATUS section quoted above says, with an invalid 'n'
146# the shell has the option of exiting, or returning status != 0, so
147# again this test allows both.
148
149non_numeric_shift_body() {
150
151	# there are 9 args set, 010 is 8 if parsed octal, 10 decimal
152	for a in a I 0x12 010 5V -1 ' ' '' +1 ' 1'
153	do
154		atf_check -s not-exit:0 -o empty -e ignore ${TEST_SH} -c \
155			"set -- a b c d e f g h i; shift '$a' && echo ERROR"
156	done
157}
158
159atf_test_case too_many_args
160too_many_args_head() {
161	# See PR bin/50896
162	atf_set "descr" "Test that sh detects invalid extraneous args to shift"
163}
164# This is a syntax error, a non-interactive shell (us) must exit $? != 0
165too_many_args_body() {
166	# This tests the bug in PR bin/50896 is fixed
167
168	for a in "1 1" "1 0" "1 2 3" "1 foo" "1 --" "-- 1"
169	do
170		atf_check -s not-exit:0 -o empty -e not-empty ${TEST_SH} -c \
171			" set -- a b c d; shift ${a} ; echo FAILED "
172	done
173}
174
175atf_init_test_cases() {
176	atf_add_test_case basic_shift_test
177	atf_add_test_case excessive_shift
178	atf_add_test_case function_shift
179	atf_add_test_case non_numeric_shift
180	atf_add_test_case too_many_args
181}
182