1#
2# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3#
4# Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD$
28
29atf_test_case basic
30basic_body()
31{
32	printf "a\nb\nc\nd\ne\nf\ng\nh\ni\n" > foo_full
33	printf "a\nb\nc\n" > foo_start
34	printf "g\nh\ni\n" > foo_end
35	printf "d\ne\nf\n" > foo_middle
36
37	diff -u foo_start foo_full > foo_start2full.diff
38	diff -u foo_end foo_full > foo_end2full.diff
39	diff -u foo_middle foo_full > foo_mid2full.diff
40
41	# Check lengths... each should have all 9 lines + 3 line header
42	atf_check -o inline:"12" -x \
43	    "cat foo_start2full.diff | wc -l | tr -d '[:space:]'"
44	atf_check -o inline:"12" -x \
45	    "cat foo_end2full.diff | wc -l | tr -d '[:space:]'"
46	atf_check -o inline:"12" -x \
47	    "cat foo_mid2full.diff | wc -l | tr -d '[:space:]'"
48
49	# Apply the patch! Should succeed
50	atf_check -o ignore patch foo_start foo_start2full.diff \
51	    -o foo_start2full
52	atf_check -o ignore patch foo_end foo_end2full.diff \
53	    -o foo_end2full
54	atf_check -o ignore patch foo_middle foo_mid2full.diff \
55	    -o foo_mid2full
56
57	# And these should all produce equivalent to the original full
58	atf_check -o ignore diff foo_start2full foo_full
59	atf_check -o ignore diff foo_end2full foo_full
60	atf_check -o ignore diff foo_mid2full foo_full
61}
62
63atf_test_case limited_ctx
64limited_ctx_head()
65{
66	atf_set "descr" "Verify correct behavior with limited context (PR 74127)"
67}
68limited_ctx_body()
69{
70
71	# First; PR74127-repro.diff should not have applied, but it instead
72	# assumed a match and added the modified line at the offset specified...
73	atf_check -s not-exit:0 -o ignore -e ignore patch -o _.out \
74	    "$(atf_get_srcdir)/PR74127.in" \
75	    "$(atf_get_srcdir)/PR74127-repro.diff"
76
77	# Let's extend that and make sure a similarly ill-contexted diff does
78	# not apply even with the correct line number
79	atf_check -s not-exit:0 -o ignore -e ignore patch -o _.out \
80	    "$(atf_get_srcdir)/PR74127.in" \
81	    "$(atf_get_srcdir)/PR74127-line.diff"
82
83	# Correct line number and correct old line should always work
84	atf_check -o ignore -e ignore patch -o _.out \
85	    "$(atf_get_srcdir)/PR74127.in" \
86	    "$(atf_get_srcdir)/PR74127-good.diff"
87}
88
89atf_test_case file_creation
90file_creation_body()
91{
92
93	echo "x" > foo
94	diff -u /dev/null foo > foo.diff
95	rm foo
96
97	atf_check -x "patch -s < foo.diff"
98	atf_check -o ignore stat foo
99}
100
101# This test is motivated by long-standing bugs that occasionally slip by in
102# commits.  If a file is created by a diff, patch(1) will happily duplicate the
103# contents as many times as you apply the diff.  It should instead detect that
104# a source of /dev/null creates the file, so it shouldn't exist.  Furthermore,
105# the reverse of creation is deletion -- hence the next test, which ensures that
106# the file is removed if it's empty once the patch is reversed.  The size checks
107# are scattered throughout to make sure that we didn't get some kind of false
108# error, and the first size check is merely a sanity check that should be
109# trivially true as this is executed in a sandbox.
110atf_test_case file_nodupe
111file_nodupe_body()
112{
113
114	echo "x" > foo
115	diff -u /dev/null foo > foo.diff
116
117	atf_check -o inline:"2\n" stat -f "%z" foo
118	atf_check -s not-exit:0 -o ignore -x "patch -Ns < foo.diff"
119	atf_check -o inline:"2\n" stat -f "%z" foo
120	atf_check -s not-exit:0 -o ignore -x "patch -fs < foo.diff"
121	atf_check -o inline:"2\n" stat -f "%z" foo
122}
123
124atf_test_case file_removal
125file_removal_body()
126{
127
128	echo "x" > foo
129	diff -u /dev/null foo > foo.diff
130
131	# Check that the file is removed completely if it was sourced from
132	# /dev/null
133	atf_check -x "patch -Rs < foo.diff"
134	atf_check -s not-exit:0 -e ignore stat foo
135
136	# But if it had been modified, we'll only remove the portion that the
137	# patch would have created.  This makes us compatible with GNU patch's
138	# behavior, at least.  Whether that is the sane action or not is a
139	# question for further study, and then this comment may be removed.
140	printf "x\ny\n" > foo
141	atf_check -x "patch -Rs < foo.diff"
142	atf_check -o inline:"y\n" cat foo
143}
144
145atf_init_test_cases()
146{
147	atf_add_test_case basic
148	atf_add_test_case limited_ctx
149	atf_add_test_case file_creation
150	atf_add_test_case file_nodupe
151	atf_add_test_case file_removal
152}
153