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         grep "$ORPHAN_WARNING" "$1"
  17 }
  18 check_no_orphan_warning() {
  19         ! grep "$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         check_orphan_warning stderr
 113 '
 114
 115 test_expect_success 'checkout does not warn leaving ref tip' '
 116         reset &&
 117         git checkout --detach two &&
 118         git checkout master 2>stderr &&
 119         check_no_orphan_warning stderr
 120 '
 121
 122 test_expect_success 'checkout does not warn leaving reachable commit' '
 123         reset &&
 124         git checkout --detach HEAD^ &&
 125         git checkout master 2>stderr &&
 126         check_no_orphan_warning stderr
 127 '
 128
 129 cat >expect <<'EOF'
 130 Your branch is behind 'master' by 1 commit, and can be fast-forwarded.
 131 EOF
 132 test_expect_success 'tracking count is accurate after orphan check' '
 133         reset &&
 134         git branch child master^ &&
 135         git config branch.child.remote . &&
 136         git config branch.child.merge refs/heads/master &&
 137         git checkout child^ &&
 138         git checkout child >stdout &&
 139         test_cmp expect stdout
 140 '
 141
 142 test_done