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t1404: demonstrate a bug resolving references

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Add some tests checking that it is possible to work with a reference
even if there is an empty directory where the loose ref would be stored.

One of the new tests demonstrates a bug that has been with us since at
least 2.5.0--single reference lookup gives up when it sees the
directory, even if the reference exists as a packed ref. This probably
hasn't been reported before because Git usually cleans up empty
directories when packing references.

This bug will be fixed shortly.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
This commit is contained in:
Michael Haggerty 2016-05-05 13:22:23 +02:00
parent 3ad15fd5e1
commit 19dd7d06e5
1 changed files with 75 additions and 1 deletions
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76
t/t1404-update-ref-df-conflicts.sh
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@ -28,7 +28,9 @@ Q="'"
test_expect_success 'setup' ' test_expect_success 'setup' '
git commit --allow-empty -m Initial && git commit --allow-empty -m Initial &&
C=$(git rev-parse HEAD) C=$(git rev-parse HEAD) &&
git commit --allow-empty -m Second &&
D=$(git rev-parse HEAD)
' '
@ -104,4 +106,76 @@ test_expect_success 'one new ref is a simple prefix of another' '
' '
test_expect_failure 'empty directory should not fool rev-parse' '
prefix=refs/e-rev-parse &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
echo "$C" >expected &&
git rev-parse $prefix/foo >actual &&
test_cmp expected actual
'
test_expect_success 'empty directory should not fool for-each-ref' '
prefix=refs/e-for-each-ref &&
git update-ref $prefix/foo $C &&
git for-each-ref $prefix >expected &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
git for-each-ref $prefix >actual &&
test_cmp expected actual
'
test_expect_success 'empty directory should not fool create' '
prefix=refs/e-create &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "create %s $C\n" $prefix/foo |
git update-ref --stdin
'
test_expect_success 'empty directory should not fool verify' '
prefix=refs/e-verify &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "verify %s $C\n" $prefix/foo |
git update-ref --stdin
'
test_expect_success 'empty directory should not fool 1-arg update' '
prefix=refs/e-update-1 &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "update %s $D\n" $prefix/foo |
git update-ref --stdin
'
test_expect_success 'empty directory should not fool 2-arg update' '
prefix=refs/e-update-2 &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "update %s $D $C\n" $prefix/foo |
git update-ref --stdin
'
test_expect_success 'empty directory should not fool 0-arg delete' '
prefix=refs/e-delete-0 &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "delete %s\n" $prefix/foo |
git update-ref --stdin
'
test_expect_success 'empty directory should not fool 1-arg delete' '
prefix=refs/e-delete-1 &&
git update-ref $prefix/foo $C &&
git pack-refs --all &&
mkdir -p .git/$prefix/foo/bar/baz &&
printf "delete %s $C\n" $prefix/foo |
git update-ref --stdin
'
test_done test_done