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-rwxr-xr-xt/t5503-tagfollow.sh64
1 files changed, 64 insertions, 0 deletions
diff --git a/t/t5503-tagfollow.sh b/t/t5503-tagfollow.sh
index 195fc64..a3c0101 100755
--- a/t/t5503-tagfollow.sh
+++ b/t/t5503-tagfollow.sh
@@ -160,4 +160,68 @@ test_expect_success 'new clone fetch main and tags' '
test_cmp expect actual
'
+test_expect_success 'atomic fetch with failing backfill' '
+ git init clone3 &&
+
+ # We want to test whether a failure when backfilling tags correctly
+ # aborts the complete transaction when `--atomic` is passed: we should
+ # neither create the branch nor should we create the tag when either
+ # one of both fails to update correctly.
+ #
+ # To trigger failure we simply abort when backfilling a tag.
+ write_script clone3/.git/hooks/reference-transaction <<-\EOF &&
+ while read oldrev newrev reference
+ do
+ if test "$reference" = refs/tags/tag1
+ then
+ exit 1
+ fi
+ done
+ EOF
+
+ test_must_fail git -C clone3 fetch --atomic .. $B:refs/heads/something &&
+ test_must_fail git -C clone3 rev-parse --verify refs/heads/something &&
+ test_must_fail git -C clone3 rev-parse --verify refs/tags/tag2
+'
+
+test_expect_success 'atomic fetch with backfill should use single transaction' '
+ git init clone4 &&
+
+ # Fetching with the `--atomic` flag should update all references in a
+ # single transaction, including backfilled tags. We thus expect to see
+ # a single reference transaction for the created branch and tags.
+ cat >expected <<-EOF &&
+ prepared
+ $ZERO_OID $B refs/heads/something
+ $ZERO_OID $S refs/tags/tag2
+ $ZERO_OID $T refs/tags/tag1
+ committed
+ $ZERO_OID $B refs/heads/something
+ $ZERO_OID $S refs/tags/tag2
+ $ZERO_OID $T refs/tags/tag1
+ EOF
+
+ write_script clone4/.git/hooks/reference-transaction <<-\EOF &&
+ ( echo "$*" && cat ) >>actual
+ EOF
+
+ git -C clone4 fetch --atomic .. $B:refs/heads/something &&
+ test_cmp expected clone4/actual
+'
+
+test_expect_success 'backfill failure causes command to fail' '
+ git init clone5 &&
+
+ # Create a tag that is nested below the tag we are about to fetch via
+ # the backfill mechanism. This causes a D/F conflict when backfilling
+ # and should thus cause the command to fail.
+ empty_blob=$(git -C clone5 hash-object -w --stdin </dev/null) &&
+ git -C clone5 update-ref refs/tags/tag1/nested $empty_blob &&
+
+ test_must_fail git -C clone5 fetch .. $B:refs/heads/something &&
+ test $B = $(git -C clone5 rev-parse --verify refs/heads/something) &&
+ test $S = $(git -C clone5 rev-parse --verify tag2) &&
+ test_must_fail git -C clone5 rev-parse --verify tag1
+'
+
test_done