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-lib.sh
  13
  14 expect_branch() {
  15         git log -1 --format=%s "$1" >actual &&
  16         echo "$2" >expect &&
  17         test_cmp expect actual
  18 }
  19
  20 expect_deleted() {
  21         test_must_fail git rev-parse --verify "$1"
  22 }
  23
  24 test_expect_success 'set up repo' '
  25         test_commit one &&
  26         test_commit two &&
  27         git remote add origin foo.git
  28 '
  29
  30 test_expect_success 'update branch via @{-1}' '
  31         git branch previous one &&
  32
  33         git checkout previous &&
  34         git checkout main &&
  35
  36         git branch -f @{-1} two &&
  37         expect_branch previous two
  38 '
  39
  40 test_expect_success 'update branch via local @{upstream}' '
  41         git branch local one &&
  42         git branch --set-upstream-to=local &&
  43
  44         git branch -f @{upstream} two &&
  45         expect_branch local two
  46 '
  47
  48 test_expect_success 'disallow updating branch via remote @{upstream}' '
  49         git update-ref refs/remotes/origin/remote one &&
  50         git branch --set-upstream-to=origin/remote &&
  51
  52         test_must_fail git branch -f @{upstream} two
  53 '
  54
  55 test_expect_success 'create branch with pseudo-qualified name' '
  56         git branch refs/heads/qualified two &&
  57         expect_branch refs/heads/refs/heads/qualified two
  58 '
  59
  60 test_expect_success 'delete branch via @{-1}' '
  61         git branch previous-del &&
  62
  63         git checkout previous-del &&
  64         git checkout main &&
  65
  66         git branch -D @{-1} &&
  67         expect_deleted previous-del
  68 '
  69
  70 test_expect_success 'delete branch via local @{upstream}' '
  71         git branch local-del &&
  72         git branch --set-upstream-to=local-del &&
  73
  74         git branch -D @{upstream} &&
  75         expect_deleted local-del
  76 '
  77
  78 test_expect_success 'delete branch via remote @{upstream}' '
  79         git update-ref refs/remotes/origin/remote-del two &&
  80         git branch --set-upstream-to=origin/remote-del &&
  81
  82         git branch -r -D @{upstream} &&
  83         expect_deleted origin/remote-del
  84 '
  85
  86 # Note that we create two oddly named local branches here. We want to make
  87 # sure that we do not accidentally delete either of them, even if
  88 # shorten_unambiguous_ref() tweaks the name to avoid ambiguity.
  89 test_expect_success 'delete @{upstream} expansion matches -r option' '
  90         git update-ref refs/remotes/origin/remote-del two &&
  91         git branch --set-upstream-to=origin/remote-del &&
  92         git update-ref refs/heads/origin/remote-del two &&
  93         git update-ref refs/heads/remotes/origin/remote-del two &&
  94
  95         test_must_fail git branch -D @{upstream} &&
  96         expect_branch refs/heads/origin/remote-del two &&
  97         expect_branch refs/heads/remotes/origin/remote-del two
  98 '
  99
 100 test_expect_success 'disallow deleting remote branch via @{-1}' '
 101         git update-ref refs/remotes/origin/previous one &&
 102
 103         git checkout -b origin/previous two &&
 104         git checkout main &&
 105
 106         test_must_fail git branch -r -D @{-1} &&
 107         expect_branch refs/remotes/origin/previous one &&
 108         expect_branch refs/heads/origin/previous two
 109 '
 110
 111 # The thing we are testing here is that "@" is the real branch refs/heads/@,
 112 # and not refs/heads/HEAD. These tests should not imply that refs/heads/@ is a
 113 # sane thing, but it _is_ technically allowed for now. If we disallow it, these
 114 # can be switched to test_must_fail.
 115 test_expect_success 'create branch named "@"' '
 116         git branch -f @ one &&
 117         expect_branch refs/heads/@ one
 118 '
 119
 120 test_expect_success 'delete branch named "@"' '
 121         git update-ref refs/heads/@ two &&
 122         git branch -D @ &&
 123         expect_deleted refs/heads/@
 124 '
 125
 126 test_expect_success 'checkout does not treat remote @{upstream} as a branch' '
 127         git update-ref refs/remotes/origin/checkout one &&
 128         git branch --set-upstream-to=origin/checkout &&
 129         git update-ref refs/heads/origin/checkout two &&
 130         git update-ref refs/heads/remotes/origin/checkout two &&
 131
 132         git checkout @{upstream} &&
 133         expect_branch HEAD one
 134 '
 135
 136 test_expect_success 'edit-description via @{-1}' '
 137         git checkout -b desc-branch &&
 138         git checkout -b non-desc-branch &&
 139         write_script editor <<-\EOF &&
 140                 echo "Branch description" >"$1"
 141         EOF
 142         EDITOR=./editor git branch --edit-description @{-1} &&
 143         test_must_fail git config branch.non-desc-branch.description &&
 144         git config branch.desc-branch.description >actual &&
 145         printf "Branch description\n\n" >expect &&
 146         test_cmp expect actual
 147 '
 148
 149 test_expect_success 'modify branch upstream via "@{-1}" and "@{-1}@{upstream}"' '
 150         git checkout -b upstream-branch &&
 151         git checkout -b upstream-other -t upstream-branch &&
 152         git branch --set-upstream-to upstream-other @{-1} &&
 153         git config branch.upstream-branch.merge >actual &&
 154         echo "refs/heads/upstream-other" >expect &&
 155         test_cmp expect actual &&
 156         git branch --unset-upstream @{-1}@{upstream} &&
 157         test_must_fail git config branch.upstream-other.merge
 158 '
 159
 160 test_done