t/t2018-checkout-branch.sh

   1 #!/bin/sh
   2
   3 test_description='checkout'
   4
   5 . ./test-lib.sh
   6
   7 # Arguments: [!] <branch> <oid> [<checkout options>]
   8 #
   9 # Runs "git checkout" to switch to <branch>, testing that
  10 #
  11 #   1) we are on the specified branch, <branch>;
  12 #   2) HEAD is <oid>; if <oid> is not specified, the old HEAD is used.
  13 #
  14 # If <checkout options> is not specified, "git checkout" is run with -b.
  15 #
  16 # If the first argument is `!`, "git checkout" is expected to fail when
  17 # it is run.
  18 do_checkout () {
  19         should_fail= &&
  20         if test "x$1" = "x!"
  21         then
  22                 should_fail=yes &&
  23                 shift
  24         fi &&
  25         exp_branch=$1 &&
  26         exp_ref="refs/heads/$exp_branch" &&
  27
  28         # if <oid> is not specified, use HEAD.
  29         exp_oid=${2:-$(git rev-parse --verify HEAD)} &&
  30
  31         # default options for git checkout: -b
  32         if test -z "$3"
  33         then
  34                 opts="-b"
  35         else
  36                 opts="$3"
  37         fi
  38
  39         if test -n "$should_fail"
  40         then
  41                 test_must_fail git checkout $opts $exp_branch $exp_oid
  42         else
  43                 git checkout $opts $exp_branch $exp_oid &&
  44                 echo "$exp_ref" >ref.expect &&
  45                 git rev-parse --symbolic-full-name HEAD >ref.actual &&
  46                 test_cmp ref.expect ref.actual &&
  47                 echo "$exp_oid" >oid.expect &&
  48                 git rev-parse --verify HEAD >oid.actual &&
  49                 test_cmp oid.expect oid.actual
  50         fi
  51 }
  52
  53 test_dirty_unmergeable () {
  54         test_expect_code 1 git diff --exit-code
  55 }
  56
  57 test_dirty_unmergeable_discards_changes () {
  58         git diff --exit-code
  59 }
  60
  61 setup_dirty_unmergeable () {
  62         echo >>file1 change2
  63 }
  64
  65 test_dirty_mergeable () {
  66         test_expect_code 1 git diff --cached --exit-code
  67 }
  68
  69 test_dirty_mergeable_discards_changes () {
  70         git diff --cached --exit-code
  71 }
  72
  73 setup_dirty_mergeable () {
  74         echo >file2 file2 &&
  75         git add file2
  76 }
  77
  78 test_expect_success 'setup' '
  79         test_commit initial file1 &&
  80         HEAD1=$(git rev-parse --verify HEAD) &&
  81
  82         test_commit change1 file1 &&
  83         HEAD2=$(git rev-parse --verify HEAD) &&
  84
  85         git branch -m branch1
  86 '
  87
  88 test_expect_success 'checkout -b to a new branch, set to HEAD' '
  89         test_when_finished "
  90                 git checkout branch1 &&
  91                 test_might_fail git branch -D branch2" &&
  92         do_checkout branch2
  93 '
  94
  95 test_expect_success 'checkout -b to a merge base' '
  96         test_when_finished "
  97                 git checkout branch1 &&
  98                 test_might_fail git branch -D branch2" &&
  99         git checkout -b branch2 branch1...
 100 '
 101
 102 test_expect_success 'checkout -b to a new branch, set to an explicit ref' '
 103         test_when_finished "
 104                 git checkout branch1 &&
 105                 test_might_fail git branch -D branch2" &&
 106         do_checkout branch2 $HEAD1
 107 '
 108
 109 test_expect_success 'checkout -b to a new branch with unmergeable changes fails' '
 110         setup_dirty_unmergeable &&
 111         do_checkout ! branch2 $HEAD1 &&
 112         test_dirty_unmergeable
 113 '
 114
 115 test_expect_success 'checkout -f -b to a new branch with unmergeable changes discards changes' '
 116         test_when_finished "
 117                 git checkout branch1 &&
 118                 test_might_fail git branch -D branch2" &&
 119
 120         # still dirty and on branch1
 121         do_checkout branch2 $HEAD1 "-f -b" &&
 122         test_dirty_unmergeable_discards_changes
 123 '
 124
 125 test_expect_success 'checkout -b to a new branch preserves mergeable changes' '
 126         test_when_finished "
 127                 git reset --hard &&
 128                 git checkout branch1 &&
 129                 test_might_fail git branch -D branch2" &&
 130
 131         setup_dirty_mergeable &&
 132         do_checkout branch2 $HEAD1 &&
 133         test_dirty_mergeable
 134 '
 135
 136 test_expect_success 'checkout -f -b to a new branch with mergeable changes discards changes' '
 137         test_when_finished git reset --hard HEAD &&
 138         setup_dirty_mergeable &&
 139         do_checkout branch2 $HEAD1 "-f -b" &&
 140         test_dirty_mergeable_discards_changes
 141 '
 142
 143 test_expect_success 'checkout -b to an existing branch fails' '
 144         test_when_finished git reset --hard HEAD &&
 145         do_checkout ! branch2 $HEAD2
 146 '
 147
 148 test_expect_success 'checkout -b to @{-1} fails with the right branch name' '
 149         git checkout branch1 &&
 150         git checkout branch2 &&
 151         echo  >expect "fatal: A branch named '\''branch1'\'' already exists." &&
 152         test_must_fail git checkout -b @{-1} 2>actual &&
 153         test_i18ncmp expect actual
 154 '
 155
 156 test_expect_success 'checkout -B to an existing branch resets branch to HEAD' '
 157         git checkout branch1 &&
 158
 159         do_checkout branch2 "" -B
 160 '
 161
 162 test_expect_success 'checkout -B to a merge base' '
 163         git checkout branch1 &&
 164
 165         git checkout -B branch2 branch1...
 166 '
 167
 168 test_expect_success 'checkout -B to an existing branch from detached HEAD resets branch to HEAD' '
 169         head=$(git rev-parse --verify HEAD) &&
 170         git checkout "$head" &&
 171
 172         do_checkout branch2 "" -B
 173 '
 174
 175 test_expect_success 'checkout -B to an existing branch with an explicit ref resets branch to that ref' '
 176         git checkout branch1 &&
 177
 178         do_checkout branch2 $HEAD1 -B
 179 '
 180
 181 test_expect_success 'checkout -B to an existing branch with unmergeable changes fails' '
 182         git checkout branch1 &&
 183
 184         setup_dirty_unmergeable &&
 185         do_checkout ! branch2 $HEAD1 -B &&
 186         test_dirty_unmergeable
 187 '
 188
 189 test_expect_success 'checkout -f -B to an existing branch with unmergeable changes discards changes' '
 190         # still dirty and on branch1
 191         do_checkout branch2 $HEAD1 "-f -B" &&
 192         test_dirty_unmergeable_discards_changes
 193 '
 194
 195 test_expect_success 'checkout -B to an existing branch preserves mergeable changes' '
 196         test_when_finished git reset --hard &&
 197         git checkout branch1 &&
 198
 199         setup_dirty_mergeable &&
 200         do_checkout branch2 $HEAD1 -B &&
 201         test_dirty_mergeable
 202 '
 203
 204 test_expect_success 'checkout -f -B to an existing branch with mergeable changes discards changes' '
 205         git checkout branch1 &&
 206
 207         setup_dirty_mergeable &&
 208         do_checkout branch2 $HEAD1 "-f -B" &&
 209         test_dirty_mergeable_discards_changes
 210 '
 211
 212 test_expect_success 'checkout -b <describe>' '
 213         git tag -f -m "First commit" initial initial &&
 214         git checkout -f change1 &&
 215         name=$(git describe) &&
 216         git checkout -b $name &&
 217         git diff --exit-code change1 &&
 218         echo "refs/heads/$name" >expect &&
 219         git symbolic-ref HEAD >actual &&
 220         test_cmp expect actual
 221 '
 222
 223 test_expect_success 'checkout -B to the current branch works' '
 224         git checkout branch1 &&
 225         git checkout -B branch1-scratch &&
 226
 227         setup_dirty_mergeable &&
 228         git checkout -B branch1-scratch initial &&
 229         test_dirty_mergeable
 230 '
 231
 232 test_expect_success 'checkout -b after clone --no-checkout does a checkout of HEAD' '
 233         git init src &&
 234         test_commit -C src a &&
 235         rev="$(git -C src rev-parse HEAD)" &&
 236         git clone --no-checkout src dest &&
 237         git -C dest checkout "$rev" -b branch &&
 238         test_path_is_file dest/a.t
 239 '
 240
 241 test_done