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 'force-copy a branch to itself via @{-1} is no-op' '
  61         git branch -t copiable main &&
  62         git checkout copiable &&
  63         git checkout - &&
  64         git branch -C @{-1} copiable &&
  65         git config --get-all branch.copiable.merge >actual &&
  66         echo refs/heads/main >expect &&
  67         test_cmp expect actual
  68 '
  69
  70 test_expect_success 'delete branch via @{-1}' '
  71         git branch previous-del &&
  72
  73         git checkout previous-del &&
  74         git checkout main &&
  75
  76         git branch -D @{-1} &&
  77         expect_deleted previous-del
  78 '
  79
  80 test_expect_success 'delete branch via local @{upstream}' '
  81         git branch local-del &&
  82         git branch --set-upstream-to=local-del &&
  83
  84         git branch -D @{upstream} &&
  85         expect_deleted local-del
  86 '
  87
  88 test_expect_success 'delete branch via remote @{upstream}' '
  89         git update-ref refs/remotes/origin/remote-del two &&
  90         git branch --set-upstream-to=origin/remote-del &&
  91
  92         git branch -r -D @{upstream} &&
  93         expect_deleted origin/remote-del
  94 '
  95
  96 # Note that we create two oddly named local branches here. We want to make
  97 # sure that we do not accidentally delete either of them, even if
  98 # shorten_unambiguous_ref() tweaks the name to avoid ambiguity.
  99 test_expect_success 'delete @{upstream} expansion matches -r option' '
 100         git update-ref refs/remotes/origin/remote-del two &&
 101         git branch --set-upstream-to=origin/remote-del &&
 102         git update-ref refs/heads/origin/remote-del two &&
 103         git update-ref refs/heads/remotes/origin/remote-del two &&
 104
 105         test_must_fail git branch -D @{upstream} &&
 106         expect_branch refs/heads/origin/remote-del two &&
 107         expect_branch refs/heads/remotes/origin/remote-del two
 108 '
 109
 110 test_expect_success 'disallow deleting remote branch via @{-1}' '
 111         git update-ref refs/remotes/origin/previous one &&
 112
 113         git checkout -b origin/previous two &&
 114         git checkout main &&
 115
 116         test_must_fail git branch -r -D @{-1} &&
 117         expect_branch refs/remotes/origin/previous one &&
 118         expect_branch refs/heads/origin/previous two
 119 '
 120
 121 # The thing we are testing here is that "@" is the real branch refs/heads/@,
 122 # and not refs/heads/HEAD. These tests should not imply that refs/heads/@ is a
 123 # sane thing, but it _is_ technically allowed for now. If we disallow it, these
 124 # can be switched to test_must_fail.
 125 test_expect_success 'create branch named "@"' '
 126         git branch -f @ one &&
 127         expect_branch refs/heads/@ one
 128 '
 129
 130 test_expect_success 'delete branch named "@"' '
 131         git update-ref refs/heads/@ two &&
 132         git branch -D @ &&
 133         expect_deleted refs/heads/@
 134 '
 135
 136 test_expect_success 'checkout does not treat remote @{upstream} as a branch' '
 137         git update-ref refs/remotes/origin/checkout one &&
 138         git branch --set-upstream-to=origin/checkout &&
 139         git update-ref refs/heads/origin/checkout two &&
 140         git update-ref refs/heads/remotes/origin/checkout two &&
 141
 142         git checkout @{upstream} &&
 143         expect_branch HEAD one
 144 '
 145
 146 test_expect_success 'edit-description via @{-1}' '
 147         git checkout -b desc-branch &&
 148         git checkout -b non-desc-branch &&
 149         write_script editor <<-\EOF &&
 150                 echo "Branch description" >"$1"
 151         EOF
 152         EDITOR=./editor git branch --edit-description @{-1} &&
 153         test_must_fail git config branch.non-desc-branch.description &&
 154         git config branch.desc-branch.description >actual &&
 155         printf "Branch description\n\n" >expect &&
 156         test_cmp expect actual
 157 '
 158
 159 test_expect_success 'modify branch upstream via "@{-1}" and "@{-1}@{upstream}"' '
 160         git checkout -b upstream-branch &&
 161         git checkout -b upstream-other -t upstream-branch &&
 162         git branch --set-upstream-to upstream-other @{-1} &&
 163         git config branch.upstream-branch.merge >actual &&
 164         echo "refs/heads/upstream-other" >expect &&
 165         test_cmp expect actual &&
 166         git branch --unset-upstream @{-1}@{upstream} &&
 167         test_must_fail git config branch.upstream-other.merge
 168 '
 169
 170 test_done