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 <<'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