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 TEST_PASSES_SANITIZE_LEAK=true
   9 . ./test-lib.sh
  10 . "$TEST_DIRECTORY"/lib-diff.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 $tree >current &&
 127         compare_diff_patch current expected
 128 '
 129
 130 test_expect_success 'favour same basenames over different ones' '
 131         cp path1 another-path &&
 132         git add another-path &&
 133         git commit -m 1 &&
 134         git rm path1 &&
 135         mkdir subdir &&
 136         git mv another-path subdir/path1 &&
 137         git status >out &&
 138         test_grep "renamed: .*path1 -> subdir/path1" out
 139 '
 140
 141 test_expect_success 'test diff.renames=true for git status' '
 142         git -c diff.renames=true status >out &&
 143         test_grep "renamed: .*path1 -> subdir/path1" out
 144 '
 145
 146 test_expect_success 'test diff.renames=false for git status' '
 147         git -c diff.renames=false status >out &&
 148         test_grep ! "renamed: .*path1 -> subdir/path1" out &&
 149         test_grep "new file: .*subdir/path1" out &&
 150         test_grep "deleted: .*[^/]path1" out
 151 '
 152
 153 test_expect_success 'favour same basenames even with minor differences' '
 154         git show HEAD:path1 | sed "s/15/16/" > subdir/path1 &&
 155         git status >out &&
 156         test_grep "renamed: .*path1 -> subdir/path1" out
 157 '
 158
 159 test_expect_success 'two files with same basename and same content' '
 160         git reset --hard &&
 161         mkdir -p dir/A dir/B &&
 162         cp path1 dir/A/file &&
 163         cp path1 dir/B/file &&
 164         git add dir &&
 165         git commit -m 2 &&
 166         git mv dir other-dir &&
 167         git status >out &&
 168         test_grep "renamed: .*dir/A/file -> other-dir/A/file" out
 169 '
 170
 171 test_expect_success 'setup for many rename source candidates' '
 172         git reset --hard &&
 173         for i in 0 1 2 3 4 5 6 7 8 9;
 174         do
 175                 for j in 0 1 2 3 4 5 6 7 8 9;
 176                 do
 177                         echo "$i$j" >"path$i$j" || return 1
 178                 done
 179         done &&
 180         git add "path??" &&
 181         test_tick &&
 182         git commit -m "hundred" &&
 183         (cat path1 && echo new) >new-path &&
 184         echo old >>path1 &&
 185         git add new-path path1 &&
 186         git diff -l 4 -C -C --cached --name-status >actual 2>actual.err &&
 187         sed -e "s/^\([CM]\)[0-9]*       /\1     /" actual >actual.munged &&
 188         cat >expect <<-EOF &&
 189         C       path1   new-path
 190         M       path1
 191         EOF
 192         test_cmp expect actual.munged &&
 193         grep warning actual.err
 194 '
 195
 196 test_expect_success 'rename pretty print with nothing in common' '
 197         mkdir -p a/b/ &&
 198         : >a/b/c &&
 199         git add a/b/c &&
 200         git commit -m "create a/b/c" &&
 201         mkdir -p c/b/ &&
 202         git mv a/b/c c/b/a &&
 203         git commit -m "a/b/c -> c/b/a" &&
 204         git diff -M --summary HEAD^ HEAD >output &&
 205         test_grep " a/b/c => c/b/a " output &&
 206         git diff -M --stat HEAD^ HEAD >output &&
 207         test_grep " a/b/c => c/b/a " output
 208 '
 209
 210 test_expect_success 'rename pretty print with common prefix' '
 211         mkdir -p c/d &&
 212         git mv c/b/a c/d/e &&
 213         git commit -m "c/b/a -> c/d/e" &&
 214         git diff -M --summary HEAD^ HEAD >output &&
 215         test_grep " c/{b/a => d/e} " output &&
 216         git diff -M --stat HEAD^ HEAD >output &&
 217         test_grep " c/{b/a => d/e} " output
 218 '
 219
 220 test_expect_success 'rename pretty print with common suffix' '
 221         mkdir d &&
 222         git mv c/d/e d/e &&
 223         git commit -m "c/d/e -> d/e" &&
 224         git diff -M --summary HEAD^ HEAD >output &&
 225         test_grep " {c/d => d}/e " output &&
 226         git diff -M --stat HEAD^ HEAD >output &&
 227         test_grep " {c/d => d}/e " output
 228 '
 229
 230 test_expect_success 'rename pretty print with common prefix and suffix' '
 231         mkdir d/f &&
 232         git mv d/e d/f/e &&
 233         git commit -m "d/e -> d/f/e" &&
 234         git diff -M --summary HEAD^ HEAD >output &&
 235         test_grep " d/{ => f}/e " output &&
 236         git diff -M --stat HEAD^ HEAD >output &&
 237         test_grep " d/{ => f}/e " output
 238 '
 239
 240 test_expect_success 'rename pretty print common prefix and suffix overlap' '
 241         mkdir d/f/f &&
 242         git mv d/f/e d/f/f/e &&
 243         git commit -m "d/f/e d/f/f/e" &&
 244         git diff -M --summary HEAD^ HEAD >output &&
 245         test_grep " d/f/{ => f}/e " output &&
 246         git diff -M --stat HEAD^ HEAD >output &&
 247         test_grep " d/f/{ => f}/e " output
 248 '
 249
 250 test_expect_success 'diff-tree -l0 defaults to a big rename limit, not zero' '
 251         test_write_lines line1 line2 line3 >myfile &&
 252         git add myfile &&
 253         git commit -m x &&
 254
 255         test_write_lines line1 line2 line4 >myotherfile &&
 256         git rm myfile &&
 257         git add myotherfile &&
 258         git commit -m x &&
 259
 260         git diff-tree -M -l0 HEAD HEAD^ >actual &&
 261         # Verify that a rename from myotherfile to myfile was detected
 262         grep "myotherfile.*myfile" actual
 263 '
 264
 265 test_expect_success 'basename similarity vs best similarity' '
 266         mkdir subdir &&
 267         test_write_lines line1 line2 line3 line4 line5 \
 268                          line6 line7 line8 line9 line10 >subdir/file.txt &&
 269         git add subdir/file.txt &&
 270         git commit -m "base txt" &&
 271
 272         git rm subdir/file.txt &&
 273         test_write_lines line1 line2 line3 line4 line5 \
 274                           line6 line7 line8 >file.txt &&
 275         test_write_lines line1 line2 line3 line4 line5 \
 276                           line6 line7 line8 line9 >file.md &&
 277         git add file.txt file.md &&
 278         git commit -a -m "rename" &&
 279         git diff-tree -r -M --name-status HEAD^ HEAD >actual &&
 280         # subdir/file.txt is 88% similar to file.md, 78% similar to file.txt,
 281         # but since same basenames are checked first...
 282         cat >expected <<-\EOF &&
 283         A       file.md
 284         R078    subdir/file.txt file.txt
 285         EOF
 286         test_cmp expected actual
 287 '
 288
 289 test_expect_success 'last line matters too' '
 290         {
 291                 test_write_lines a 0 1 2 3 4 5 6 7 8 9 &&
 292                 printf "git ignores final up to 63 characters if not newline terminated"
 293         } >no-final-lf &&
 294         git add no-final-lf &&
 295         git commit -m "original version of file with no final newline" &&
 296
 297         # Change ONLY the first character of the whole file
 298         {
 299                 test_write_lines b 0 1 2 3 4 5 6 7 8 9 &&
 300                 printf "git ignores final up to 63 characters if not newline terminated"
 301         } >no-final-lf &&
 302         git add no-final-lf &&
 303         git mv no-final-lf still-absent-final-lf &&
 304         git commit -a -m "rename no-final-lf -> still-absent-final-lf" &&
 305         git diff-tree -r -M --name-status HEAD^ HEAD >actual &&
 306         sed -e "s/^R[0-9]*      /R      /" actual >actual.munged &&
 307         cat >expected <<-\EOF &&
 308         R       no-final-lf     still-absent-final-lf
 309         EOF
 310         test_cmp expected actual.munged
 311 '
 312
 313 test_done