t/t3204-branch-name-interpretation.sh

   1 #!/bin/sh
   2
   3 test_description='interpreting exotic branch name arguments
   4
   5 Branch name arguments are usually names which are taken to be inside of
   6 refs/heads/, but we interpret some magic syntax like @{-1}, @{upstream}, etc.
   7 This script aims to check the behavior of those corner cases.
   8 '
   9 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  10 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  11
  12 TEST_PASSES_SANITIZE_LEAK=true
  13 . ./test-lib.sh
  14
  15 expect_branch() {
  16         git log -1 --format=%s "$1" >actual &&
  17         echo "$2" >expect &&
  18         test_cmp expect actual
  19 }
  20
  21 expect_deleted() {
  22         test_must_fail git rev-parse --verify "$1"
  23 }
  24
  25 test_expect_success 'set up repo' '
  26         test_commit one &&
  27         test_commit two &&
  28         git remote add origin foo.git
  29 '
  30
  31 test_expect_success 'update branch via @{-1}' '
  32         git branch previous one &&
  33
  34         git checkout previous &&
  35         git checkout main &&
  36
  37         git branch -f @{-1} two &&
  38         expect_branch previous two
  39 '
  40
  41 test_expect_success 'update branch via local @{upstream}' '
  42         git branch local one &&
  43         git branch --set-upstream-to=local &&
  44
  45         git branch -f @{upstream} two &&
  46         expect_branch local two
  47 '
  48
  49 test_expect_success 'disallow updating branch via remote @{upstream}' '
  50         git update-ref refs/remotes/origin/remote one &&
  51         git branch --set-upstream-to=origin/remote &&
  52
  53         test_must_fail git branch -f @{upstream} two
  54 '
  55
  56 test_expect_success 'create branch with pseudo-qualified name' '
  57         git branch refs/heads/qualified two &&
  58         expect_branch refs/heads/refs/heads/qualified two
  59 '
  60
  61 test_expect_success 'force-copy a branch to itself via @{-1} is no-op' '
  62         git branch -t copiable main &&
  63         git checkout copiable &&
  64         git checkout - &&
  65         git branch -C @{-1} copiable &&
  66         git config --get-all branch.copiable.merge >actual &&
  67         echo refs/heads/main >expect &&
  68         test_cmp expect actual
  69 '
  70
  71 test_expect_success 'delete branch via @{-1}' '
  72         git branch previous-del &&
  73
  74         git checkout previous-del &&
  75         git checkout main &&
  76
  77         git branch -D @{-1} &&
  78         expect_deleted previous-del
  79 '
  80
  81 test_expect_success 'delete branch via local @{upstream}' '
  82         git branch local-del &&
  83         git branch --set-upstream-to=local-del &&
  84
  85         git branch -D @{upstream} &&
  86         expect_deleted local-del
  87 '
  88
  89 test_expect_success 'delete branch via remote @{upstream}' '
  90         git update-ref refs/remotes/origin/remote-del two &&
  91         git branch --set-upstream-to=origin/remote-del &&
  92
  93         git branch -r -D @{upstream} &&
  94         expect_deleted origin/remote-del
  95 '
  96
  97 # Note that we create two oddly named local branches here. We want to make
  98 # sure that we do not accidentally delete either of them, even if
  99 # shorten_unambiguous_ref() tweaks the name to avoid ambiguity.
 100 test_expect_success 'delete @{upstream} expansion matches -r option' '
 101         git update-ref refs/remotes/origin/remote-del two &&
 102         git branch --set-upstream-to=origin/remote-del &&
 103         git update-ref refs/heads/origin/remote-del two &&
 104         git update-ref refs/heads/remotes/origin/remote-del two &&
 105
 106         test_must_fail git branch -D @{upstream} &&
 107         expect_branch refs/heads/origin/remote-del two &&
 108         expect_branch refs/heads/remotes/origin/remote-del two
 109 '
 110
 111 test_expect_success 'disallow deleting remote branch via @{-1}' '
 112         git update-ref refs/remotes/origin/previous one &&
 113
 114         git checkout -b origin/previous two &&
 115         git checkout main &&
 116
 117         test_must_fail git branch -r -D @{-1} &&
 118         expect_branch refs/remotes/origin/previous one &&
 119         expect_branch refs/heads/origin/previous two
 120 '
 121
 122 # The thing we are testing here is that "@" is the real branch refs/heads/@,
 123 # and not refs/heads/HEAD. These tests should not imply that refs/heads/@ is a
 124 # sane thing, but it _is_ technically allowed for now. If we disallow it, these
 125 # can be switched to test_must_fail.
 126 test_expect_success 'create branch named "@"' '
 127         git branch -f @ one &&
 128         expect_branch refs/heads/@ one
 129 '
 130
 131 test_expect_success 'delete branch named "@"' '
 132         git update-ref refs/heads/@ two &&
 133         git branch -D @ &&
 134         expect_deleted refs/heads/@
 135 '
 136
 137 test_expect_success 'checkout does not treat remote @{upstream} as a branch' '
 138         git update-ref refs/remotes/origin/checkout one &&
 139         git branch --set-upstream-to=origin/checkout &&
 140         git update-ref refs/heads/origin/checkout two &&
 141         git update-ref refs/heads/remotes/origin/checkout two &&
 142
 143         git checkout @{upstream} &&
 144         expect_branch HEAD one
 145 '
 146
 147 test_expect_success 'edit-description via @{-1}' '
 148         git checkout -b desc-branch &&
 149         git checkout -b non-desc-branch &&
 150         write_script editor <<-\EOF &&
 151                 echo "Branch description" >"$1"
 152         EOF
 153         EDITOR=./editor git branch --edit-description @{-1} &&
 154         test_must_fail git config branch.non-desc-branch.description &&
 155         git config branch.desc-branch.description >actual &&
 156         printf "Branch description\n\n" >expect &&
 157         test_cmp expect actual
 158 '
 159
 160 test_expect_success 'modify branch upstream via "@{-1}" and "@{-1}@{upstream}"' '
 161         git checkout -b upstream-branch &&
 162         git checkout -b upstream-other -t upstream-branch &&
 163         git branch --set-upstream-to upstream-other @{-1} &&
 164         git config branch.upstream-branch.merge >actual &&
 165         echo "refs/heads/upstream-other" >expect &&
 166         test_cmp expect actual &&
 167         git branch --unset-upstream @{-1}@{upstream} &&
 168         test_must_fail git config branch.upstream-other.merge
 169 '
 170
 171 test_done