t/t4008-diff-break-rewrite.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5
   6 test_description='Break and then rename
   7
   8 We have two very different files, file0 and file1, registered in a tree.
   9
  10 We update file1 so drastically that it is more similar to file0, and
  11 then remove file0.  With -B, changes to file1 should be broken into
  12 separate delete and create, resulting in removal of file0, removal of
  13 original file1 and creation of completely rewritten file1.
  14
  15 Further, with -B and -M together, these three modifications should
  16 turn into rename-edit of file0 into file1.
  17
  18 Starting from the same two files in the tree, we swap file0 and file1.
  19 With -B, this should be detected as two complete rewrites, resulting in
  20 four changes in total.
  21
  22 Further, with -B and -M together, these should turn into two renames.
  23 '
  24 . ./test-lib.sh
  25 . "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
  26
  27 test_expect_success \
  28     setup \
  29     'cat "$TEST_DIRECTORY"/../README >file0 &&
  30      cat "$TEST_DIRECTORY"/../COPYING >file1 &&
  31     git update-index --add file0 file1 &&
  32     tree=$(git write-tree) &&
  33     echo "$tree"'
  34
  35 test_expect_success \
  36     'change file1 with copy-edit of file0 and remove file0' \
  37     'sed -e "s/git/GIT/" file0 >file1 &&
  38      rm -f file0 &&
  39     git update-index --remove file0 file1'
  40
  41 test_expect_success \
  42     'run diff with -B' \
  43     'git diff-index -B --cached "$tree" >current'
  44
  45 cat >expected <<\EOF
  46 :100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D      file0
  47 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 11e331465a89c394dc25c780de230043750c1ec8 M100   file1
  48 EOF
  49
  50 test_expect_success \
  51     'validate result of -B (#1)' \
  52     'compare_diff_raw expected current'
  53
  54 test_expect_success \
  55     'run diff with -B and -M' \
  56     'git diff-index -B -M "$tree" >current'
  57
  58 cat >expected <<\EOF
  59 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c R100   file0   file1
  60 EOF
  61
  62 test_expect_success \
  63     'validate result of -B -M (#2)' \
  64     'compare_diff_raw expected current'
  65
  66 test_expect_success \
  67     'swap file0 and file1' \
  68     'rm -f file0 file1 &&
  69      git read-tree -m $tree &&
  70      git checkout-index -f -u -a &&
  71      mv file0 tmp &&
  72      mv file1 file0 &&
  73      mv tmp file1 &&
  74      git update-index file0 file1'
  75
  76 test_expect_success \
  77     'run diff with -B' \
  78     'git diff-index -B "$tree" >current'
  79
  80 cat >expected <<\EOF
  81 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M100   file0
  82 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100   file1
  83 EOF
  84
  85 test_expect_success \
  86     'validate result of -B (#3)' \
  87     'compare_diff_raw expected current'
  88
  89 test_expect_success \
  90     'run diff with -B and -M' \
  91     'git diff-index -B -M "$tree" >current'
  92
  93 cat >expected <<\EOF
  94 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 R100   file1   file0
  95 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 R100   file0   file1
  96 EOF
  97
  98 test_expect_success \
  99     'validate result of -B -M (#4)' \
 100     'compare_diff_raw expected current'
 101
 102 test_expect_success \
 103     'make file0 into something completely different' \
 104     'rm -f file0 &&
 105      test_ln_s_add frotz file0 &&
 106      git update-index file1'
 107
 108 test_expect_success \
 109     'run diff with -B' \
 110     'git diff-index -B "$tree" >current'
 111
 112 cat >expected <<\EOF
 113 :100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T      file0
 114 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100   file1
 115 EOF
 116
 117 test_expect_success \
 118     'validate result of -B (#5)' \
 119     'compare_diff_raw expected current'
 120
 121 test_expect_success \
 122     'run diff with -B -M' \
 123     'git diff-index -B -M "$tree" >current'
 124
 125 # file0 changed from regular to symlink.  file1 is very close to the preimage of file0.
 126 # because we break file0, file1 can become a rename of it.
 127 cat >expected <<\EOF
 128 :100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T      file0
 129 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 R      file0   file1
 130 EOF
 131
 132 test_expect_success \
 133     'validate result of -B -M (#6)' \
 134     'compare_diff_raw expected current'
 135
 136 test_expect_success \
 137     'run diff with -M' \
 138     'git diff-index -M "$tree" >current'
 139
 140 # This should not mistake file0 as the copy source of new file1
 141 # due to type differences.
 142 cat >expected <<\EOF
 143 :100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T      file0
 144 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M      file1
 145 EOF
 146
 147 test_expect_success \
 148     'validate result of -M (#7)' \
 149     'compare_diff_raw expected current'
 150
 151 test_expect_success \
 152     'file1 edited to look like file0 and file0 rename-edited to file2' \
 153     'rm -f file0 file1 &&
 154      git read-tree -m $tree &&
 155      git checkout-index -f -u -a &&
 156      sed -e "s/git/GIT/" file0 >file1 &&
 157      sed -e "s/git/GET/" file0 >file2 &&
 158      rm -f file0 &&
 159      git update-index --add --remove file0 file1 file2'
 160
 161 test_expect_success \
 162     'run diff with -B' \
 163     'git diff-index -B "$tree" >current'
 164
 165 cat >expected <<\EOF
 166 :100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D      file0
 167 :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 08bb2fb671deff4c03a4d4a0a1315dff98d5732c M100   file1
 168 :000000 100644 0000000000000000000000000000000000000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 A      file2
 169 EOF
 170
 171 test_expect_success \
 172     'validate result of -B (#8)' \
 173     'compare_diff_raw expected current'
 174
 175 test_expect_success \
 176     'run diff with -B -C' \
 177     'git diff-index -B -C "$tree" >current'
 178
 179 cat >expected <<\EOF
 180 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c C095   file0   file1
 181 :100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 59f832e5c8b3f7e486be15ad0cd3e95ba9af8998 R095   file0   file2
 182 EOF
 183
 184 test_expect_success \
 185     'validate result of -B -M (#9)' \
 186     'compare_diff_raw expected current'
 187
 188 test_done