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git-mirror/t/t0613-reftable-write-options.sh
Patrick Steinhardt e0011188ca reftable/table: move printing logic into test helper
The logic to print individual blocks in a table is hosted in the
reftable library. This is only the case due to historical reasons though
because users of the library had no interfaces to read blocks one by
one. Otherwise, printing individual blocks has no place in the reftable
library given that the format will not be generic in the first place.

We have now grown a public interface to iterate through blocks contained
in a table, and thus we can finally move the logic to print them into
the test helper.

Move over the logic and refactor it accordingly. Note that the iterator
also trivially allows us to access index sections, which we previously
didn't print at all. This omission wasn't intentional though, so start
dumping those sections as well so that we can assert that indices are
written as expected.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-04-07 14:53:13 -07:00

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#!/bin/sh
test_description='reftable write options'
GIT_TEST_DEFAULT_REF_FORMAT=reftable
export GIT_TEST_DEFAULT_REF_FORMAT
# Disable auto-compaction for all tests as we explicitly control repacking of
# refs.
GIT_TEST_REFTABLE_AUTOCOMPACTION=false
export GIT_TEST_REFTABLE_AUTOCOMPACTION
# Block sizes depend on the hash function, so we force SHA1 here.
GIT_TEST_DEFAULT_HASH=sha1
export GIT_TEST_DEFAULT_HASH
# Block sizes also depend on the actual refs we write, so we force "master" to
# be the default initial branch name.
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_expect_success 'default write options' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
git pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 4096
ref:
- length: 129
restarts: 2
log:
- length: 262
restarts: 2
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'disabled reflog writes no log blocks' '
test_config_global core.logAllRefUpdates false &&
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
git pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 4096
ref:
- length: 129
restarts: 2
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'many refs results in multiple blocks' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
for i in $(test_seq 200)
do
printf "update refs/heads/branch-%d HEAD\n" "$i" ||
return 1
done >input &&
git update-ref --stdin <input &&
git pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 4096
ref:
- length: 4049
restarts: 11
- length: 1136
restarts: 3
log:
- length: 4041
restarts: 4
- length: 4015
restarts: 3
- length: 4014
restarts: 3
- length: 4012
restarts: 3
- length: 3289
restarts: 3
idx:
- length: 103
restarts: 1
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'tiny block size leads to error' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
cat >expect <<-EOF &&
error: unable to compact stack: entry too large
EOF
test_must_fail git -c reftable.blockSize=50 pack-refs 2>err &&
test_cmp expect err
)
'
test_expect_success 'small block size leads to multiple ref blocks' '
test_config_global core.logAllRefUpdates false &&
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit A &&
test_commit B &&
git -c reftable.blockSize=100 pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 100
ref:
- length: 53
restarts: 1
- length: 74
restarts: 1
- length: 38
restarts: 1
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'small block size fails with large reflog message' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit A &&
perl -e "print \"a\" x 500" >logmsg &&
cat >expect <<-EOF &&
fatal: update_ref failed for ref ${SQ}refs/heads/logme${SQ}: reftable: transaction failure: entry too large
EOF
test_must_fail git -c reftable.blockSize=100 \
update-ref -m "$(cat logmsg)" refs/heads/logme HEAD 2>err &&
test_cmp expect err
)
'
test_expect_success 'block size exceeding maximum supported size' '
test_config_global core.logAllRefUpdates false &&
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit A &&
test_commit B &&
cat >expect <<-EOF &&
fatal: reftable block size cannot exceed 16MB
EOF
test_must_fail git -c reftable.blockSize=16777216 pack-refs 2>err &&
test_cmp expect err
)
'
test_expect_success 'restart interval at every single record' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
for i in $(test_seq 10)
do
printf "update refs/heads/branch-%d HEAD\n" "$i" ||
return 1
done >input &&
git update-ref --stdin <input &&
git -c reftable.restartInterval=1 pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 4096
ref:
- length: 566
restarts: 13
log:
- length: 1393
restarts: 12
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'restart interval exceeding maximum supported interval' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
cat >expect <<-EOF &&
fatal: reftable block size cannot exceed 65535
EOF
test_must_fail git -c reftable.restartInterval=65536 pack-refs 2>err &&
test_cmp expect err
)
'
test_expect_success 'object index gets written by default with ref index' '
test_config_global core.logAllRefUpdates false &&
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
for i in $(test_seq 5)
do
printf "update refs/heads/branch-%d HEAD\n" "$i" ||
return 1
done >input &&
git update-ref --stdin <input &&
git -c reftable.blockSize=100 pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 100
ref:
- length: 53
restarts: 1
- length: 95
restarts: 1
- length: 71
restarts: 1
- length: 80
restarts: 1
idx:
- length: 55
restarts: 2
obj:
- length: 11
restarts: 1
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_expect_success 'object index can be disabled' '
test_config_global core.logAllRefUpdates false &&
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&
test_commit initial &&
for i in $(test_seq 5)
do
printf "update refs/heads/branch-%d HEAD\n" "$i" ||
return 1
done >input &&
git update-ref --stdin <input &&
git -c reftable.blockSize=100 -c reftable.indexObjects=false pack-refs &&
cat >expect <<-EOF &&
header:
block_size: 100
ref:
- length: 53
restarts: 1
- length: 95
restarts: 1
- length: 71
restarts: 1
- length: 80
restarts: 1
idx:
- length: 55
restarts: 2
EOF
test-tool dump-reftable -b .git/reftable/*.ref >actual &&
test_cmp expect actual
)
'
test_done