Add a test that checks that Git does not make use of changed path
filters that have an unrecognized version.
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
t/t4216-log-bloom.sh | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/t/t4216-log-bloom.sh b/t/t4216-log-bloom.sh
index fa9d32facf..f14cc1c1f1 100755
--- a/t/t4216-log-bloom.sh
+++ b/t/t4216-log-bloom.sh
@@ -85,6 +85,36 @@ test_bloom_filters_not_used () {
test_cmp log_wo_bloom log_w_bloom
}
+get_bdat_offset () {
+ perl -0777 -ne \
+ 'print unpack("N", "$1") if /BDAT\0\0\0\0(....)/ or exit 1' \
+ .git/objects/info/commit-graph
+}
+
+test_expect_success 'incompatible bloom filter versions are not used' '
+ cp .git/objects/info/commit-graph old-commit-graph &&
+ test_when_finished "mv old-commit-graph .git/objects/info/commit-graph" &&
+
+ BDAT_OFFSET=$(get_bdat_offset) &&
+
+ # Write an arbitrary number to the least significant byte of the
+ # version field in the BDAT chunk
+ cat old-commit-graph >new-commit-graph &&
+ printf "\aa" |
+ dd of=new-commit-graph bs=1 count=1 \
+ seek=$((BDAT_OFFSET + 3)) conv=notrunc &&
+ mv new-commit-graph .git/objects/info/commit-graph &&
+ test_bloom_filters_not_used "-- A" &&
+
+ # But the correct version number works
+ cat old-commit-graph >new-commit-graph &&
+ printf "\01" |
+ dd of=new-commit-graph bs=1 count=1 \
+ seek=$((BDAT_OFFSET + 3)) conv=notrunc &&
+ mv new-commit-graph .git/objects/info/commit-graph &&
+ test_bloom_filters_used "-- A"
+'
+
for path in A A/B A/B/C A/file1 A/B/file2 A/B/C/file3 file4 file5 file5_renamed file_to_be_deleted
do
for option in "" \
--
2.40.1.698.g37aff9b760-goog
