t/t4001-diff-rename.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5
   6 test_description='Test rename detection in diff engine.
   7
   8 '
   9 . ./test-lib.sh
  10 . "$TEST_DIRECTORY"/diff-lib.sh
  11
  12 test_expect_success 'setup' '
  13         cat >path0 <<-\EOF &&
  14         Line 1
  15         Line 2
  16         Line 3
  17         Line 4
  18         Line 5
  19         Line 6
  20         Line 7
  21         Line 8
  22         Line 9
  23         Line 10
  24         line 11
  25         Line 12
  26         Line 13
  27         Line 14
  28         Line 15
  29         EOF
  30         cat >expected <<-\EOF &&
  31         diff --git a/path0 b/path1
  32         rename from path0
  33         rename to path1
  34         --- a/path0
  35         +++ b/path1
  36         @@ -8,7 +8,7 @@ Line 7
  37          Line 8
  38          Line 9
  39          Line 10
  40         -line 11
  41         +Line 11
  42          Line 12
  43          Line 13
  44          Line 14
  45         EOF
  46         cat >no-rename <<-\EOF
  47         diff --git a/path0 b/path0
  48         deleted file mode 100644
  49         index fdbec44..0000000
  50         --- a/path0
  51         +++ /dev/null
  52         @@ -1,15 +0,0 @@
  53         -Line 1
  54         -Line 2
  55         -Line 3
  56         -Line 4
  57         -Line 5
  58         -Line 6
  59         -Line 7
  60         -Line 8
  61         -Line 9
  62         -Line 10
  63         -line 11
  64         -Line 12
  65         -Line 13
  66         -Line 14
  67         -Line 15
  68         diff --git a/path1 b/path1
  69         new file mode 100644
  70         index 0000000..752c50e
  71         --- /dev/null
  72         +++ b/path1
  73         @@ -0,0 +1,15 @@
  74         +Line 1
  75         +Line 2
  76         +Line 3
  77         +Line 4
  78         +Line 5
  79         +Line 6
  80         +Line 7
  81         +Line 8
  82         +Line 9
  83         +Line 10
  84         +Line 11
  85         +Line 12
  86         +Line 13
  87         +Line 14
  88         +Line 15
  89         EOF
  90 '
  91
  92 test_expect_success \
  93     'update-index --add a file.' \
  94     'git update-index --add path0'
  95
  96 test_expect_success \
  97     'write that tree.' \
  98     'tree=$(git write-tree) && echo $tree'
  99
 100 sed -e 's/line/Line/' <path0 >path1
 101 rm -f path0
 102 test_expect_success \
 103     'renamed and edited the file.' \
 104     'git update-index --add --remove path0 path1'
 105
 106 test_expect_success \
 107     'git diff-index -p -M after rename and editing.' \
 108     'git diff-index -p -M $tree >current'
 109
 110
 111 test_expect_success \
 112     'validate the output.' \
 113     'compare_diff_patch current expected'
 114
 115 test_expect_success 'test diff.renames=true' '
 116         git -c diff.renames=true diff --cached $tree >current &&
 117         compare_diff_patch current expected
 118 '
 119
 120 test_expect_success 'test diff.renames=false' '
 121         git -c diff.renames=false diff --cached $tree >current &&
 122         compare_diff_patch current no-rename
 123 '
 124
 125 test_expect_success 'test diff.renames unset' '
 126         git diff --cached $tree >current &&
 127         compare_diff_patch current expected
 128 '
 129
 130 test_expect_success 'favour same basenames over different ones' '
 131         cp path1 another-path &&
 132         git add another-path &&
 133         git commit -m 1 &&
 134         git rm path1 &&
 135         mkdir subdir &&
 136         git mv another-path subdir/path1 &&
 137         git status >out &&
 138         test_i18ngrep "renamed: .*path1 -> subdir/path1" out
 139 '
 140
 141 test_expect_success 'favour same basenames even with minor differences' '
 142         git show HEAD:path1 | sed "s/15/16/" > subdir/path1 &&
 143         git status >out &&
 144         test_i18ngrep "renamed: .*path1 -> subdir/path1" out
 145 '
 146
 147 test_expect_success 'two files with same basename and same content' '
 148         git reset --hard &&
 149         mkdir -p dir/A dir/B &&
 150         cp path1 dir/A/file &&
 151         cp path1 dir/B/file &&
 152         git add dir &&
 153         git commit -m 2 &&
 154         git mv dir other-dir &&
 155         git status >out &&
 156         test_i18ngrep "renamed: .*dir/A/file -> other-dir/A/file" out
 157 '
 158
 159 test_expect_success 'setup for many rename source candidates' '
 160         git reset --hard &&
 161         for i in 0 1 2 3 4 5 6 7 8 9;
 162         do
 163                 for j in 0 1 2 3 4 5 6 7 8 9;
 164                 do
 165                         echo "$i$j" >"path$i$j"
 166                 done
 167         done &&
 168         git add "path??" &&
 169         test_tick &&
 170         git commit -m "hundred" &&
 171         (cat path1; echo new) >new-path &&
 172         echo old >>path1 &&
 173         git add new-path path1 &&
 174         git diff -l 4 -C -C --cached --name-status >actual 2>actual.err &&
 175         sed -e "s/^\([CM]\)[0-9]*       /\1     /" actual >actual.munged &&
 176         cat >expect <<-EOF &&
 177         C       path1   new-path
 178         M       path1
 179         EOF
 180         test_cmp expect actual.munged &&
 181         grep warning actual.err
 182 '
 183
 184 test_expect_success 'rename pretty print with nothing in common' '
 185         mkdir -p a/b/ &&
 186         : >a/b/c &&
 187         git add a/b/c &&
 188         git commit -m "create a/b/c" &&
 189         mkdir -p c/b/ &&
 190         git mv a/b/c c/b/a &&
 191         git commit -m "a/b/c -> c/b/a" &&
 192         git diff -M --summary HEAD^ HEAD >output &&
 193         test_i18ngrep " a/b/c => c/b/a " output &&
 194         git diff -M --stat HEAD^ HEAD >output &&
 195         test_i18ngrep " a/b/c => c/b/a " output
 196 '
 197
 198 test_expect_success 'rename pretty print with common prefix' '
 199         mkdir -p c/d &&
 200         git mv c/b/a c/d/e &&
 201         git commit -m "c/b/a -> c/d/e" &&
 202         git diff -M --summary HEAD^ HEAD >output &&
 203         test_i18ngrep " c/{b/a => d/e} " output &&
 204         git diff -M --stat HEAD^ HEAD >output &&
 205         test_i18ngrep " c/{b/a => d/e} " output
 206 '
 207
 208 test_expect_success 'rename pretty print with common suffix' '
 209         mkdir d &&
 210         git mv c/d/e d/e &&
 211         git commit -m "c/d/e -> d/e" &&
 212         git diff -M --summary HEAD^ HEAD >output &&
 213         test_i18ngrep " {c/d => d}/e " output &&
 214         git diff -M --stat HEAD^ HEAD >output &&
 215         test_i18ngrep " {c/d => d}/e " output
 216 '
 217
 218 test_expect_success 'rename pretty print with common prefix and suffix' '
 219         mkdir d/f &&
 220         git mv d/e d/f/e &&
 221         git commit -m "d/e -> d/f/e" &&
 222         git diff -M --summary HEAD^ HEAD >output &&
 223         test_i18ngrep " d/{ => f}/e " output &&
 224         git diff -M --stat HEAD^ HEAD >output &&
 225         test_i18ngrep " d/{ => f}/e " output
 226 '
 227
 228 test_expect_success 'rename pretty print common prefix and suffix overlap' '
 229         mkdir d/f/f &&
 230         git mv d/f/e d/f/f/e &&
 231         git commit -m "d/f/e d/f/f/e" &&
 232         git diff -M --summary HEAD^ HEAD >output &&
 233         test_i18ngrep " d/f/{ => f}/e " output &&
 234         git diff -M --stat HEAD^ HEAD >output &&
 235         test_i18ngrep " d/f/{ => f}/e " output
 236 '
 237
 238 test_expect_success 'diff-tree -l0 defaults to a big rename limit, not zero' '
 239         test_write_lines line1 line2 line3 >myfile &&
 240         git add myfile &&
 241         git commit -m x &&
 242
 243         test_write_lines line1 line2 line4 >myotherfile &&
 244         git rm myfile &&
 245         git add myotherfile &&
 246         git commit -m x &&
 247
 248         git diff-tree -M -l0 HEAD HEAD^ >actual &&
 249         # Verify that a rename from myotherfile to myfile was detected
 250         grep "myotherfile.*myfile" actual
 251 '
 252
 253 test_done