Merge branch 'sg/clone-initial-fetch-configuration'
[git] / t / t4051-diff-function-context.sh
1 #!/bin/sh
2
3 test_description='diff function context'
4
5 . ./test-lib.sh
6
7 dir="$TEST_DIRECTORY/t4051"
8
9 commit_and_tag () {
10         tag=$1 &&
11         shift &&
12         git add "$@" &&
13         test_tick &&
14         git commit -m "$tag" &&
15         git tag "$tag"
16 }
17
18 first_context_line () {
19         awk '
20                 found {print; exit}
21                 /^@@/ {found = 1}
22         '
23 }
24
25 last_context_line () {
26         sed -ne \$p
27 }
28
29 check_diff () {
30         name=$1
31         desc=$2
32         options="-W $3"
33
34         test_expect_success "$desc" '
35                 git diff $options "$name^" "$name" >"$name.diff"
36         '
37
38         test_expect_success ' diff applies' '
39                 test_when_finished "git reset --hard" &&
40                 git checkout --detach "$name^" &&
41                 git apply --index "$name.diff" &&
42                 git diff --exit-code "$name"
43         '
44 }
45
46 test_expect_success 'setup' '
47         cat "$dir/includes.c" "$dir/dummy.c" "$dir/dummy.c" "$dir/hello.c" \
48                 "$dir/dummy.c" "$dir/dummy.c" >file.c &&
49         commit_and_tag initial file.c &&
50
51         grep -v "delete me from hello" <file.c >file.c.new &&
52         mv file.c.new file.c &&
53         commit_and_tag changed_hello file.c &&
54
55         grep -v "delete me from includes" <file.c >file.c.new &&
56         mv file.c.new file.c &&
57         commit_and_tag changed_includes file.c &&
58
59         cat "$dir/appended1.c" >>file.c &&
60         commit_and_tag appended file.c &&
61
62         cat "$dir/appended2.c" >>file.c &&
63         commit_and_tag extended file.c &&
64
65         grep -v "Begin of second part" <file.c >file.c.new &&
66         mv file.c.new file.c &&
67         commit_and_tag long_common_tail file.c &&
68
69         git checkout initial &&
70         cat "$dir/hello.c" "$dir/dummy.c" >file.c &&
71         commit_and_tag hello_dummy file.c &&
72
73         # overlap function context of 1st change and -u context of 2nd change
74         grep -v "delete me from hello" <"$dir/hello.c" >file.c &&
75         sed "2a\\
76              extra line" <"$dir/dummy.c" >>file.c &&
77         commit_and_tag changed_hello_dummy file.c &&
78
79         git checkout initial &&
80         grep -v "delete me from hello" <file.c >file.c.new &&
81         mv file.c.new file.c &&
82         cat "$dir/appended1.c" >>file.c &&
83         commit_and_tag changed_hello_appended file.c
84 '
85
86 check_diff changed_hello 'changed function'
87
88 test_expect_success ' context includes comment' '
89         grep "^ .*Hello comment" changed_hello.diff
90 '
91
92 test_expect_success ' context includes begin' '
93         grep "^ .*Begin of hello" changed_hello.diff
94 '
95
96 test_expect_success ' context includes end' '
97         grep "^ .*End of hello" changed_hello.diff
98 '
99
100 test_expect_success ' context does not include other functions' '
101         test $(grep -c "^[ +-].*Begin" changed_hello.diff) -le 1
102 '
103
104 test_expect_success ' context does not include preceding empty lines' '
105         test "$(first_context_line <changed_hello.diff)" != " "
106 '
107
108 test_expect_success ' context does not include trailing empty lines' '
109         test "$(last_context_line <changed_hello.diff)" != " "
110 '
111
112 check_diff changed_includes 'changed includes'
113
114 test_expect_success ' context includes begin' '
115         grep "^ .*Begin.h" changed_includes.diff
116 '
117
118 test_expect_success ' context includes end' '
119         grep "^ .*End.h" changed_includes.diff
120 '
121
122 test_expect_success ' context does not include other functions' '
123         test $(grep -c "^[ +-].*Begin" changed_includes.diff) -le 1
124 '
125
126 test_expect_success ' context does not include trailing empty lines' '
127         test "$(last_context_line <changed_includes.diff)" != " "
128 '
129
130 check_diff appended 'appended function'
131
132 test_expect_success ' context includes begin' '
133         grep "^[+].*Begin of first part" appended.diff
134 '
135
136 test_expect_success ' context includes end' '
137         grep "^[+].*End of first part" appended.diff
138 '
139
140 test_expect_success ' context does not include other functions' '
141         test $(grep -c "^[ +-].*Begin" appended.diff) -le 1
142 '
143
144 check_diff extended 'appended function part'
145
146 test_expect_success ' context includes begin' '
147         grep "^ .*Begin of first part" extended.diff
148 '
149
150 test_expect_success ' context includes end' '
151         grep "^[+].*End of second part" extended.diff
152 '
153
154 test_expect_success ' context does not include other functions' '
155         test $(grep -c "^[ +-].*Begin" extended.diff) -le 2
156 '
157
158 test_expect_success ' context does not include preceding empty lines' '
159         test "$(first_context_line <extended.diff)" != " "
160 '
161
162 check_diff long_common_tail 'change with long common tail and no context' -U0
163
164 test_expect_success ' context includes begin' '
165         grep "^ .*Begin of first part" long_common_tail.diff
166 '
167
168 test_expect_success ' context includes end' '
169         grep "^ .*End of second part" long_common_tail.diff
170 '
171
172 test_expect_success ' context does not include other functions' '
173         test $(grep -c "^[ +-].*Begin" long_common_tail.diff) -le 2
174 '
175
176 test_expect_success ' context does not include preceding empty lines' '
177         test "$(first_context_line <long_common_tail.diff)" != " "
178 '
179
180 check_diff changed_hello_appended 'changed function plus appended function'
181
182 test_expect_success ' context includes begin' '
183         grep "^ .*Begin of hello" changed_hello_appended.diff &&
184         grep "^[+].*Begin of first part" changed_hello_appended.diff
185 '
186
187 test_expect_success ' context includes end' '
188         grep "^ .*End of hello" changed_hello_appended.diff &&
189         grep "^[+].*End of first part" changed_hello_appended.diff
190 '
191
192 test_expect_success ' context does not include other functions' '
193         test $(grep -c "^[ +-].*Begin" changed_hello_appended.diff) -le 2
194 '
195
196 check_diff changed_hello_dummy 'changed two consecutive functions'
197
198 test_expect_success ' context includes begin' '
199         grep "^ .*Begin of hello" changed_hello_dummy.diff &&
200         grep "^ .*Begin of dummy" changed_hello_dummy.diff
201 '
202
203 test_expect_success ' context includes end' '
204         grep "^ .*End of hello" changed_hello_dummy.diff &&
205         grep "^ .*End of dummy" changed_hello_dummy.diff
206 '
207
208 test_expect_success ' overlapping hunks are merged' '
209         test $(grep -c "^@@" changed_hello_dummy.diff) -eq 1
210 '
211
212 test_done