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