Andrew's git / gitweb.git / t/t4001-diff-rename.sh
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t / t4001-diff-rename.shon commit t4045: abstract away SHA-1-specific constants (5c02428)
   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Junio C Hamano
   4#
   5
   6test_description='Test rename detection in diff engine.
   7
   8'
   9. ./test-lib.sh
  10. "$TEST_DIRECTORY"/diff-lib.sh
  11
  12test_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
  92test_expect_success \
  93    'update-index --add a file.' \
  94    'git update-index --add path0'
  95
  96test_expect_success \
  97    'write that tree.' \
  98    'tree=$(git write-tree) && echo $tree'
  99
 100sed -e 's/line/Line/' <path0 >path1
 101rm -f path0
 102test_expect_success \
 103    'renamed and edited the file.' \
 104    'git update-index --add --remove path0 path1'
 105
 106test_expect_success \
 107    'git diff-index -p -M after rename and editing.' \
 108    'git diff-index -p -M $tree >current'
 109
 110
 111test_expect_success \
 112    'validate the output.' \
 113    'compare_diff_patch current expected'
 114
 115test_expect_success 'test diff.renames=true' '
 116        git -c diff.renames=true diff --cached $tree >current &&
 117        compare_diff_patch current expected
 118'
 119
 120test_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
 125test_expect_success 'test diff.renames unset' '
 126        git diff --cached $tree >current &&
 127        compare_diff_patch current expected
 128'
 129
 130test_expect_success 'favour same basenames over different ones' '
 131        cp path1 another-path &&
 132        git add another-path &&
 133        git commit -m 1 &&
 134        git rm path1 &&
 135        mkdir subdir &&
 136        git mv another-path subdir/path1 &&
 137        git status >out &&
 138        test_i18ngrep "renamed: .*path1 -> subdir/path1" out
 139'
 140
 141test_expect_success 'favour same basenames even with minor differences' '
 142        git show HEAD:path1 | sed "s/15/16/" > subdir/path1 &&
 143        git status >out &&
 144        test_i18ngrep "renamed: .*path1 -> subdir/path1" out
 145'
 146
 147test_expect_success 'two files with same basename and same content' '
 148        git reset --hard &&
 149        mkdir -p dir/A dir/B &&
 150        cp path1 dir/A/file &&
 151        cp path1 dir/B/file &&
 152        git add dir &&
 153        git commit -m 2 &&
 154        git mv dir other-dir &&
 155        git status >out &&
 156        test_i18ngrep "renamed: .*dir/A/file -> other-dir/A/file" out
 157'
 158
 159test_expect_success 'setup for many rename source candidates' '
 160        git reset --hard &&
 161        for i in 0 1 2 3 4 5 6 7 8 9;
 162        do
 163                for j in 0 1 2 3 4 5 6 7 8 9;
 164                do
 165                        echo "$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
 184test_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
 198test_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
 208test_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
 218test_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
 228test_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
 238test_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
 253test_done