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 ORPHAN_WARNING='you are leaving .* commit.*behind'
  15 PREV_HEAD_DESC='Previous HEAD position was'
  16 check_orphan_warning() {
  17         test_i18ngrep "$ORPHAN_WARNING" "$1" &&
  18         test_i18ngrep ! "$PREV_HEAD_DESC" "$1"
  19 }
  20 check_no_orphan_warning() {
  21         test_i18ngrep ! "$ORPHAN_WARNING" "$1" &&
  22         test_i18ngrep "$PREV_HEAD_DESC" "$1"
  23 }
  24
  25 reset () {
  26         git checkout master &&
  27         check_not_detached
  28 }
  29
  30 test_expect_success 'setup' '
  31         test_commit one &&
  32         test_commit two &&
  33         test_commit three && git tag -d three &&
  34         test_commit four && git tag -d four &&
  35         git branch branch &&
  36         git tag tag
  37 '
  38
  39 test_expect_success 'checkout branch does not detach' '
  40         reset &&
  41         git checkout branch &&
  42         check_not_detached
  43 '
  44
  45 test_expect_success 'checkout tag detaches' '
  46         reset &&
  47         git checkout tag &&
  48         check_detached
  49 '
  50
  51 test_expect_success 'checkout branch by full name detaches' '
  52         reset &&
  53         git checkout refs/heads/branch &&
  54         check_detached
  55 '
  56
  57 test_expect_success 'checkout non-ref detaches' '
  58         reset &&
  59         git checkout branch^ &&
  60         check_detached
  61 '
  62
  63 test_expect_success 'checkout ref^0 detaches' '
  64         reset &&
  65         git checkout branch^0 &&
  66         check_detached
  67 '
  68
  69 test_expect_success 'checkout --detach detaches' '
  70         reset &&
  71         git checkout --detach branch &&
  72         check_detached
  73 '
  74
  75 test_expect_success 'checkout --detach without branch name' '
  76         reset &&
  77         git checkout --detach &&
  78         check_detached
  79 '
  80
  81 test_expect_success 'checkout --detach errors out for non-commit' '
  82         reset &&
  83         test_must_fail git checkout --detach one^{tree} &&
  84         check_not_detached
  85 '
  86
  87 test_expect_success 'checkout --detach errors out for extra argument' '
  88         reset &&
  89         git checkout master &&
  90         test_must_fail git checkout --detach tag one.t &&
  91         check_not_detached
  92 '
  93
  94 test_expect_success 'checkout --detached and -b are incompatible' '
  95         reset &&
  96         test_must_fail git checkout --detach -b newbranch tag &&
  97         check_not_detached
  98 '
  99
 100 test_expect_success 'checkout --detach moves HEAD' '
 101         reset &&
 102         git checkout one &&
 103         git checkout --detach two &&
 104         git diff --exit-code HEAD &&
 105         git diff --exit-code two
 106 '
 107
 108 test_expect_success 'checkout warns on orphan commits' '
 109         reset &&
 110         git checkout --detach two &&
 111         echo content >orphan &&
 112         git add orphan &&
 113         git commit -a -m orphan &&
 114         git checkout master 2>stderr
 115 '
 116
 117 test_expect_success 'checkout warns on orphan commits: output' '
 118         check_orphan_warning stderr
 119 '
 120
 121 test_expect_success 'checkout does not warn leaving ref tip' '
 122         reset &&
 123         git checkout --detach two &&
 124         git checkout master 2>stderr
 125 '
 126
 127 test_expect_success 'checkout does not warn leaving ref tip' '
 128         check_no_orphan_warning stderr
 129 '
 130
 131 test_expect_success 'checkout does not warn leaving reachable commit' '
 132         reset &&
 133         git checkout --detach HEAD^ &&
 134         git checkout master 2>stderr
 135 '
 136
 137 test_expect_success 'checkout does not warn leaving reachable commit' '
 138         check_no_orphan_warning stderr
 139 '
 140
 141 cat >expect <<'EOF'
 142 Your branch is behind 'master' by 1 commit, and can be fast-forwarded.
 143 EOF
 144 test_expect_success 'tracking count is accurate after orphan check' '
 145         reset &&
 146         git branch child master^ &&
 147         git config branch.child.remote . &&
 148         git config branch.child.merge refs/heads/master &&
 149         git checkout child^ &&
 150         git checkout child >stdout &&
 151         test_cmp expect stdout
 152 '
 153
 154 test_done