t/t2020-checkout-detach.sh

   1 #!/bin/sh
   2
   3 test_description='checkout into detached HEAD state'
   4 . ./test-lib.sh
   5
   6 check_detached () {
   7         test_must_fail git symbolic-ref -q HEAD >/dev/null
   8 }
   9
  10 check_not_detached () {
  11         git symbolic-ref -q HEAD >/dev/null
  12 }
  13
  14 PREV_HEAD_DESC='Previous HEAD position was'
  15 check_orphan_warning() {
  16         test_i18ngrep "you are leaving $2 behind" "$1" &&
  17         test_i18ngrep ! "$PREV_HEAD_DESC" "$1"
  18 }
  19 check_no_orphan_warning() {
  20         test_i18ngrep ! "you are leaving .* commit.*behind" "$1" &&
  21         test_i18ngrep "$PREV_HEAD_DESC" "$1"
  22 }
  23
  24 reset () {
  25         git checkout master &&
  26         check_not_detached
  27 }
  28
  29 test_expect_success 'setup' '
  30         test_commit one &&
  31         test_commit two &&
  32         test_commit three && git tag -d three &&
  33         test_commit four && git tag -d four &&
  34         git branch branch &&
  35         git tag tag
  36 '
  37
  38 test_expect_success 'checkout branch does not detach' '
  39         reset &&
  40         git checkout branch &&
  41         check_not_detached
  42 '
  43
  44 test_expect_success 'checkout tag detaches' '
  45         reset &&
  46         git checkout tag &&
  47         check_detached
  48 '
  49
  50 test_expect_success 'checkout branch by full name detaches' '
  51         reset &&
  52         git checkout refs/heads/branch &&
  53         check_detached
  54 '
  55
  56 test_expect_success 'checkout non-ref detaches' '
  57         reset &&
  58         git checkout branch^ &&
  59         check_detached
  60 '
  61
  62 test_expect_success 'checkout ref^0 detaches' '
  63         reset &&
  64         git checkout branch^0 &&
  65         check_detached
  66 '
  67
  68 test_expect_success 'checkout --detach detaches' '
  69         reset &&
  70         git checkout --detach branch &&
  71         check_detached
  72 '
  73
  74 test_expect_success 'checkout --detach without branch name' '
  75         reset &&
  76         git checkout --detach &&
  77         check_detached
  78 '
  79
  80 test_expect_success 'checkout --detach errors out for non-commit' '
  81         reset &&
  82         test_must_fail git checkout --detach one^{tree} &&
  83         check_not_detached
  84 '
  85
  86 test_expect_success 'checkout --detach errors out for extra argument' '
  87         reset &&
  88         git checkout master &&
  89         test_must_fail git checkout --detach tag one.t &&
  90         check_not_detached
  91 '
  92
  93 test_expect_success 'checkout --detached and -b are incompatible' '
  94         reset &&
  95         test_must_fail git checkout --detach -b newbranch tag &&
  96         check_not_detached
  97 '
  98
  99 test_expect_success 'checkout --detach moves HEAD' '
 100         reset &&
 101         git checkout one &&
 102         git checkout --detach two &&
 103         git diff --exit-code HEAD &&
 104         git diff --exit-code two
 105 '
 106
 107 test_expect_success 'checkout warns on orphan commits' '
 108         reset &&
 109         git checkout --detach two &&
 110         echo content >orphan &&
 111         git add orphan &&
 112         git commit -a -m orphan1 &&
 113         echo new content >orphan &&
 114         git commit -a -m orphan2 &&
 115         orphan2=$(git rev-parse HEAD) &&
 116         git checkout master 2>stderr
 117 '
 118
 119 test_expect_success 'checkout warns on orphan commits: output' '
 120         check_orphan_warning stderr "2 commits"
 121 '
 122
 123 test_expect_success 'checkout warns orphaning 1 of 2 commits' '
 124         git checkout "$orphan2" &&
 125         git checkout HEAD^ 2>stderr
 126 '
 127
 128 test_expect_success 'checkout warns orphaning 1 of 2 commits: output' '
 129         check_orphan_warning stderr "1 commit"
 130 '
 131
 132 test_expect_success 'checkout does not warn leaving ref tip' '
 133         reset &&
 134         git checkout --detach two &&
 135         git checkout master 2>stderr
 136 '
 137
 138 test_expect_success 'checkout does not warn leaving ref tip' '
 139         check_no_orphan_warning stderr
 140 '
 141
 142 test_expect_success 'checkout does not warn leaving reachable commit' '
 143         reset &&
 144         git checkout --detach HEAD^ &&
 145         git checkout master 2>stderr
 146 '
 147
 148 test_expect_success 'checkout does not warn leaving reachable commit' '
 149         check_no_orphan_warning stderr
 150 '
 151
 152 cat >expect <<'EOF'
 153 Your branch is behind 'master' by 1 commit, and can be fast-forwarded.
 154   (use "git pull" to update your local branch)
 155 EOF
 156 test_expect_success 'tracking count is accurate after orphan check' '
 157         reset &&
 158         git branch child master^ &&
 159         git config branch.child.remote . &&
 160         git config branch.child.merge refs/heads/master &&
 161         git checkout child^ &&
 162         git checkout child >stdout &&
 163         test_i18ncmp expect stdout
 164 '
 165
 166 test_expect_success 'no advice given for explicit detached head state' '
 167         # baseline
 168         test_config advice.detachedHead true &&
 169         git checkout child && git checkout HEAD^0 >expect.advice 2>&1 &&
 170         test_config advice.detachedHead false &&
 171         git checkout child && git checkout HEAD^0 >expect.no-advice 2>&1 &&
 172         test_unconfig advice.detachedHead &&
 173         # without configuration, the advice.* variables default to true
 174         git checkout child && git checkout HEAD^0 >actual 2>&1 &&
 175         test_cmp expect.advice actual &&
 176
 177         # with explicit --detach
 178         # no configuration
 179         test_unconfig advice.detachedHead &&
 180         git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
 181         test_cmp expect.no-advice actual &&
 182
 183         # explicitly decline advice
 184         test_config advice.detachedHead false &&
 185         git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
 186         test_cmp expect.no-advice actual
 187 '
 188
 189 test_done