t/t6044-merge-unrelated-index-changes.sh

   1 #!/bin/sh
   2
   3 test_description="merges with unrelated index changes"
   4
   5 . ./test-lib.sh
   6
   7 # Testcase for some simple merges
   8 #   A
   9 #   o-------o B
  10 #    \
  11 #     \-----o C
  12 #      \
  13 #       \---o D
  14 #        \
  15 #         \-o E
  16 #          \
  17 #           o F
  18 #   Commit A: some file a
  19 #   Commit B: adds file b, modifies end of a
  20 #   Commit C: adds file c
  21 #   Commit D: adds file d, modifies beginning of a
  22 #   Commit E: renames a->subdir/a, adds subdir/e
  23 #   Commit F: empty commit
  24
  25 test_expect_success 'setup trivial merges' '
  26         test_seq 1 10 >a &&
  27         git add a &&
  28         test_tick && git commit -m A &&
  29
  30         git branch A &&
  31         git branch B &&
  32         git branch C &&
  33         git branch D &&
  34         git branch E &&
  35         git branch F &&
  36
  37         git checkout B &&
  38         echo b >b &&
  39         echo 11 >>a &&
  40         git add a b &&
  41         test_tick && git commit -m B &&
  42
  43         git checkout C &&
  44         echo c >c &&
  45         git add c &&
  46         test_tick && git commit -m C &&
  47
  48         git checkout D &&
  49         test_seq 2 10 >a &&
  50         echo d >d &&
  51         git add a d &&
  52         test_tick && git commit -m D &&
  53
  54         git checkout E &&
  55         mkdir subdir &&
  56         git mv a subdir/a &&
  57         echo e >subdir/e &&
  58         git add subdir &&
  59         test_tick && git commit -m E &&
  60
  61         git checkout F &&
  62         test_tick && git commit --allow-empty -m F
  63 '
  64
  65 test_expect_success 'ff update' '
  66         git reset --hard &&
  67         git checkout A^0 &&
  68
  69         touch random_file && git add random_file &&
  70
  71         git merge E^0 &&
  72
  73         test_must_fail git rev-parse HEAD:random_file &&
  74         test "$(git diff --name-only --cached E)" = "random_file"
  75 '
  76
  77 test_expect_success 'ff update, important file modified' '
  78         git reset --hard &&
  79         git checkout A^0 &&
  80
  81         mkdir subdir &&
  82         touch subdir/e &&
  83         git add subdir/e &&
  84
  85         test_must_fail git merge E^0 &&
  86         test_path_is_missing .git/MERGE_HEAD
  87 '
  88
  89 test_expect_success 'resolve, trivial' '
  90         git reset --hard &&
  91         git checkout B^0 &&
  92
  93         touch random_file && git add random_file &&
  94
  95         test_must_fail git merge -s resolve C^0 &&
  96         test_path_is_missing .git/MERGE_HEAD
  97 '
  98
  99 test_expect_success 'resolve, non-trivial' '
 100         git reset --hard &&
 101         git checkout B^0 &&
 102
 103         touch random_file && git add random_file &&
 104
 105         test_must_fail git merge -s resolve D^0 &&
 106         test_path_is_missing .git/MERGE_HEAD
 107 '
 108
 109 test_expect_success 'recursive' '
 110         git reset --hard &&
 111         git checkout B^0 &&
 112
 113         touch random_file && git add random_file &&
 114
 115         test_must_fail git merge -s recursive C^0 &&
 116         test_path_is_missing .git/MERGE_HEAD
 117 '
 118
 119 test_expect_success 'recursive, when merge branch matches merge base' '
 120         git reset --hard &&
 121         git checkout B^0 &&
 122
 123         touch random_file && git add random_file &&
 124
 125         test_must_fail git merge -s recursive F^0 &&
 126         test_path_is_missing .git/MERGE_HEAD
 127 '
 128
 129 test_expect_success 'merge-recursive, when index==head but head!=HEAD' '
 130         git reset --hard &&
 131         git checkout C^0 &&
 132
 133         # Make index match B
 134         git diff C B -- | git apply --cached &&
 135         # Merge B & F, with B as "head"
 136         git merge-recursive A -- B F > out &&
 137         test_i18ngrep "Already up to date" out
 138 '
 139
 140 test_expect_success 'recursive, when file has staged changes not matching HEAD nor what a merge would give' '
 141         git reset --hard &&
 142         git checkout B^0 &&
 143
 144         mkdir subdir &&
 145         test_seq 1 10 >subdir/a &&
 146         git add subdir/a &&
 147
 148         # We have staged changes; merge should error out
 149         test_must_fail git merge -s recursive E^0 2>err &&
 150         test_i18ngrep "changes to the following files would be overwritten" err
 151 '
 152
 153 test_expect_success 'recursive, when file has staged changes matching what a merge would give' '
 154         git reset --hard &&
 155         git checkout B^0 &&
 156
 157         mkdir subdir &&
 158         test_seq 1 11 >subdir/a &&
 159         git add subdir/a &&
 160
 161         # We have staged changes; merge should error out
 162         test_must_fail git merge -s recursive E^0 2>err &&
 163         test_i18ngrep "changes to the following files would be overwritten" err
 164 '
 165
 166 test_expect_success 'octopus, unrelated file touched' '
 167         git reset --hard &&
 168         git checkout B^0 &&
 169
 170         touch random_file && git add random_file &&
 171
 172         test_must_fail git merge C^0 D^0 &&
 173         test_path_is_missing .git/MERGE_HEAD
 174 '
 175
 176 test_expect_success 'octopus, related file removed' '
 177         git reset --hard &&
 178         git checkout B^0 &&
 179
 180         git rm b &&
 181
 182         test_must_fail git merge C^0 D^0 &&
 183         test_path_is_missing .git/MERGE_HEAD
 184 '
 185
 186 test_expect_success 'octopus, related file modified' '
 187         git reset --hard &&
 188         git checkout B^0 &&
 189
 190         echo 12 >>a && git add a &&
 191
 192         test_must_fail git merge C^0 D^0 &&
 193         test_path_is_missing .git/MERGE_HEAD
 194 '
 195
 196 test_expect_success 'ours' '
 197         git reset --hard &&
 198         git checkout B^0 &&
 199
 200         touch random_file && git add random_file &&
 201
 202         test_must_fail git merge -s ours C^0 &&
 203         test_path_is_missing .git/MERGE_HEAD
 204 '
 205
 206 test_expect_success 'subtree' '
 207         git reset --hard &&
 208         git checkout B^0 &&
 209
 210         touch random_file && git add random_file &&
 211
 212         test_must_fail git merge -s subtree E^0 &&
 213         test_path_is_missing .git/MERGE_HEAD
 214 '
 215
 216 test_done