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 reset () {
  15         git checkout master &&
  16         check_not_detached
  17 }
  18
  19 test_expect_success 'setup' '
  20         test_commit one &&
  21         test_commit two &&
  22         git branch branch &&
  23         git tag tag
  24 '
  25
  26 test_expect_success 'checkout branch does not detach' '
  27         reset &&
  28         git checkout branch &&
  29         check_not_detached
  30 '
  31
  32 test_expect_success 'checkout tag detaches' '
  33         reset &&
  34         git checkout tag &&
  35         check_detached
  36 '
  37
  38 test_expect_success 'checkout branch by full name detaches' '
  39         reset &&
  40         git checkout refs/heads/branch &&
  41         check_detached
  42 '
  43
  44 test_expect_success 'checkout non-ref detaches' '
  45         reset &&
  46         git checkout branch^ &&
  47         check_detached
  48 '
  49
  50 test_expect_success 'checkout ref^0 detaches' '
  51         reset &&
  52         git checkout branch^0 &&
  53         check_detached
  54 '
  55
  56 test_expect_success 'checkout --detach detaches' '
  57         reset &&
  58         git checkout --detach branch &&
  59         check_detached
  60 '
  61
  62 test_expect_success 'checkout --detach without branch name' '
  63         reset &&
  64         git checkout --detach &&
  65         check_detached
  66 '
  67
  68 test_expect_success 'checkout --detach errors out for non-commit' '
  69         reset &&
  70         test_must_fail git checkout --detach one^{tree} &&
  71         check_not_detached
  72 '
  73
  74 test_expect_success 'checkout --detach errors out for extra argument' '
  75         reset &&
  76         git checkout master &&
  77         test_must_fail git checkout --detach tag one.t &&
  78         check_not_detached
  79 '
  80
  81 test_expect_success 'checkout --detached and -b are incompatible' '
  82         reset &&
  83         test_must_fail git checkout --detach -b newbranch tag &&
  84         check_not_detached
  85 '
  86
  87 test_expect_success 'checkout --detach moves HEAD' '
  88         reset &&
  89         git checkout one &&
  90         git checkout --detach two &&
  91         git diff --exit-code HEAD &&
  92         git diff --exit-code two
  93 '
  94
  95 test_done