git/t/t3202-show-branch.sh
Rubén Justo bcfc82bd48 branch: description for non-existent branch errors
When the repository does not yet have commits, some errors describe that
there is no branch:

    $ git init -b first

    $ git branch --edit-description first
    error: No branch named 'first'.

    $ git branch --set-upstream-to=upstream
    fatal: branch 'first' does not exist

    $ git branch -c second
    error: refname refs/heads/first not found
    fatal: Branch copy failed

That "first" branch is unborn but to say it doesn't exists is confusing.

Options "-c" (copy) and "-m" (rename) show the same error when the
origin branch doesn't exists:

    $ git branch -c non-existent-branch second
    error: refname refs/heads/non-existent-branch not found
    fatal: Branch copy failed

    $ git branch -m non-existent-branch second
    error: refname refs/heads/non-existent-branch not found
    fatal: Branch rename failed

Note that "--edit-description" without an explicit argument is already
considering the _empty repository_ circumstance in its error.  Also note
that "-m" on the initial branch it is an allowed operation.

Make the error descriptions for those branch operations with unborn or
non-existent branches, more informative.

This is the result of the change:

    $ git init -b first

    $ git branch --edit-description first
    error: No commit on branch 'first' yet.

    $ git branch --set-upstream-to=upstream
    fatal: No commit on branch 'first' yet.

    $ git branch -c second
    fatal: No commit on branch 'first' yet.

    $ git branch [-c/-m] non-existent-branch second
    fatal: No branch named 'non-existent-branch'.

Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-10-07 20:59:41 -07:00

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#!/bin/sh
test_description='test show-branch'
. ./test-lib.sh
# arbitrary reference time: 2009-08-30 19:20:00
GIT_TEST_DATE_NOW=1251660000; export GIT_TEST_DATE_NOW
test_expect_success 'error descriptions on empty repository' '
current=$(git branch --show-current) &&
cat >expect <<-EOF &&
error: No commit on branch '\''$current'\'' yet.
EOF
test_must_fail git branch --edit-description 2>actual &&
test_cmp expect actual &&
test_must_fail git branch --edit-description $current 2>actual &&
test_cmp expect actual
'
test_expect_success 'fatal descriptions on empty repository' '
current=$(git branch --show-current) &&
cat >expect <<-EOF &&
fatal: No commit on branch '\''$current'\'' yet.
EOF
test_must_fail git branch --set-upstream-to=non-existent 2>actual &&
test_cmp expect actual &&
test_must_fail git branch -c new-branch 2>actual &&
test_cmp expect actual
'
test_expect_success 'setup' '
test_commit initial &&
for i in $(test_seq 1 10)
do
git checkout -b branch$i initial &&
test_commit --no-tag branch$i || return 1
done &&
git for-each-ref \
--sort=version:refname \
--format="%(refname:strip=2)" \
"refs/heads/branch*" >branches.sorted &&
sed "s/^> //" >expect <<-\EOF
> ! [branch1] branch1
> ! [branch2] branch2
> ! [branch3] branch3
> ! [branch4] branch4
> ! [branch5] branch5
> ! [branch6] branch6
> ! [branch7] branch7
> ! [branch8] branch8
> ! [branch9] branch9
> * [branch10] branch10
> ----------
> * [branch10] branch10
> + [branch9] branch9
> + [branch8] branch8
> + [branch7] branch7
> + [branch6] branch6
> + [branch5] branch5
> + [branch4] branch4
> + [branch3] branch3
> + [branch2] branch2
> + [branch1] branch1
> +++++++++* [branch10^] initial
EOF
'
test_expect_success 'show-branch with more than 8 branches' '
git show-branch $(cat branches.sorted) >actual &&
test_cmp expect actual
'
test_expect_success 'show-branch with showbranch.default' '
for branch in $(cat branches.sorted)
do
test_config showbranch.default $branch --add || return 1
done &&
git show-branch >actual &&
test_cmp expect actual
'
test_expect_success 'show-branch --color output' '
sed "s/^> //" >expect <<-\EOF &&
> <RED>!<RESET> [branch1] branch1
> <GREEN>!<RESET> [branch2] branch2
> <YELLOW>!<RESET> [branch3] branch3
> <BLUE>!<RESET> [branch4] branch4
> <MAGENTA>!<RESET> [branch5] branch5
> <CYAN>!<RESET> [branch6] branch6
> <BOLD;RED>!<RESET> [branch7] branch7
> <BOLD;GREEN>!<RESET> [branch8] branch8
> <BOLD;YELLOW>!<RESET> [branch9] branch9
> <BOLD;BLUE>*<RESET> [branch10] branch10
> ----------
> <BOLD;BLUE>*<RESET> [branch10] branch10
> <BOLD;YELLOW>+<RESET> [branch9] branch9
> <BOLD;GREEN>+<RESET> [branch8] branch8
> <BOLD;RED>+<RESET> [branch7] branch7
> <CYAN>+<RESET> [branch6] branch6
> <MAGENTA>+<RESET> [branch5] branch5
> <BLUE>+<RESET> [branch4] branch4
> <YELLOW>+<RESET> [branch3] branch3
> <GREEN>+<RESET> [branch2] branch2
> <RED>+<RESET> [branch1] branch1
> <RED>+<RESET><GREEN>+<RESET><YELLOW>+<RESET><BLUE>+<RESET><MAGENTA>+<RESET><CYAN>+<RESET><BOLD;RED>+<RESET><BOLD;GREEN>+<RESET><BOLD;YELLOW>+<RESET><BOLD;BLUE>*<RESET> [branch10^] initial
EOF
git show-branch --color=always $(cat branches.sorted) >actual.raw &&
test_decode_color <actual.raw >actual &&
test_cmp expect actual
'
test_expect_success 'show branch --remotes' '
cat >expect.err <<-\EOF &&
No revs to be shown.
EOF
git show-branch -r 2>actual.err >actual.out &&
test_cmp expect.err actual.err &&
test_must_be_empty actual.out
'
test_expect_success 'setup show branch --list' '
sed "s/^> //" >expect <<-\EOF
> [branch1] branch1
> [branch2] branch2
> [branch3] branch3
> [branch4] branch4
> [branch5] branch5
> [branch6] branch6
> [branch7] branch7
> [branch8] branch8
> [branch9] branch9
> * [branch10] branch10
EOF
'
test_expect_success 'show branch --list' '
git show-branch --list $(cat branches.sorted) >actual &&
test_cmp expect actual
'
test_expect_success 'show branch --list has no --color output' '
git show-branch --color=always --list $(cat branches.sorted) >actual &&
test_cmp expect actual
'
test_expect_success 'show branch --merge-base with one argument' '
for branch in $(cat branches.sorted)
do
git rev-parse $branch >expect &&
git show-branch --merge-base $branch >actual &&
test_cmp expect actual || return 1
done
'
test_expect_success 'show branch --merge-base with two arguments' '
for branch in $(cat branches.sorted)
do
git rev-parse initial >expect &&
git show-branch --merge-base initial $branch >actual &&
test_cmp expect actual || return 1
done
'
test_expect_success 'show branch --merge-base with N arguments' '
git rev-parse initial >expect &&
git show-branch --merge-base $(cat branches.sorted) >actual &&
test_cmp expect actual &&
git merge-base $(cat branches.sorted) >actual &&
test_cmp expect actual
'
test_expect_success 'show branch --reflog=2' '
sed "s/^> //" >expect <<-\EOF &&
> ! [refs/heads/branch10@{0}] (4 years, 5 months ago) commit: branch10
> ! [refs/heads/branch10@{1}] (4 years, 5 months ago) commit: branch10
> --
> + [refs/heads/branch10@{0}] branch10
> ++ [refs/heads/branch10@{1}] initial
EOF
git show-branch --reflog=2 >actual &&
test_cmp actual expect
'
# incompatible options
while read combo
do
test_expect_success "show-branch $combo (should fail)" '
test_must_fail git show-branch $combo 2>error &&
grep -e "cannot be used together" -e "usage:" error
'
done <<\EOF
--all --reflog
--merge-base --reflog
--list --merge-base
--reflog --current
EOF
test_expect_success 'error descriptions on non-existent branch' '
cat >expect <<-EOF &&
error: No branch named '\''non-existent'\'.'
EOF
test_must_fail git branch --edit-description non-existent 2>actual &&
test_cmp expect actual
'
test_expect_success 'fatal descriptions on non-existent branch' '
cat >expect <<-EOF &&
fatal: branch '\''non-existent'\'' does not exist
EOF
test_must_fail git branch --set-upstream-to=non-existent non-existent 2>actual &&
test_cmp expect actual &&
cat >expect <<-EOF &&
fatal: No branch named '\''non-existent'\''.
EOF
test_must_fail git branch -c non-existent new-branch 2>actual &&
test_cmp expect actual &&
test_must_fail git branch -m non-existent new-branch 2>actual &&
test_cmp expect actual
'
test_done