157ed85a79765d1400c89614109c502f17a6a7c3
[git/git.git] / t / t4031-diff-rewrite-binary.sh
1 #!/bin/sh
2
3 test_description='rewrite diff on binary file'
4
5 . ./test-lib.sh
6
7 # We must be large enough to meet the MINIMUM_BREAK_SIZE
8 # requirement.
9 make_file() {
10 # common first line to help identify rewrite versus regular diff
11 printf "=\n" >file
12 for i in 1 2 3 4 5 6 7 8 9 10
13 do
14 for j in 1 2 3 4 5 6 7 8 9
15 do
16 for k in 1 2 3 4 5
17 do
18 printf "$1\n"
19 done
20 done
21 done >>file
22 }
23
24 test_expect_success 'create binary file with changes' '
25 make_file "\\0" &&
26 git add file &&
27 make_file "\\01"
28 '
29
30 test_expect_success 'vanilla diff is binary' '
31 git diff >diff &&
32 grep "Binary files a/file and b/file differ" diff
33 '
34
35 test_expect_success 'rewrite diff is binary' '
36 git diff -B >diff &&
37 grep "dissimilarity index" diff &&
38 grep "Binary files a/file and b/file differ" diff
39 '
40
41 test_expect_success 'rewrite diff can show binary patch' '
42 git diff -B --binary >diff &&
43 grep "dissimilarity index" diff &&
44 grep "GIT binary patch" diff
45 '
46
47 {
48 echo "#!$SHELL_PATH"
49 cat >dump <<'EOF'
50 perl -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
51 EOF
52 } >dump
53 chmod +x dump
54
55 test_expect_success 'setup textconv' '
56 echo file diff=foo >.gitattributes &&
57 git config diff.foo.textconv "$PWD"/dump
58 '
59
60 test_expect_success 'rewrite diff respects textconv' '
61 git diff -B >diff &&
62 grep "dissimilarity index" diff &&
63 grep "^-61" diff &&
64 grep "^-0" diff
65 '
66
67 test_done