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fast-import: add a test for tree delta base corruption

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fast-import is able to write imported tree objects in delta format.
It holds a tree structure in memory where each tree entry may have
a delta base sha1 assigned. When delta base data is needed it is
reconstructed from this in-memory structure. Though sometimes the
delta base data doesn't match the delta base sha1 so wrong or even
corrupt pack is produced.

Add a small test that produces a corrupt pack. It uses just tree
copy and file modification commands aside from the very basic commit
and blob commands.

Signed-off-by: Dmitry Ivankov <divanorama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Dmitry Ivankov 2011-08-15 00:32:23 +06:00 committed by Junio C Hamano
parent 0906f6e14e
commit 9a0edb79f2
1 changed files with 41 additions and 0 deletions
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41
t/t9300-fast-import.sh
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@ -734,6 +734,47 @@ test_expect_success \
git diff-tree --abbrev --raw L^ L >output &&
test_cmp expect output'
cat >input <<INPUT_END
blob
mark :1
data <<EOF
the data
EOF
commit refs/heads/L2
committer C O Mitter <committer@example.com> 1112912473 -0700
data <<COMMIT
init L2
COMMIT
M 644 :1 a/b/c
M 644 :1 a/b/d
M 644 :1 a/e/f
commit refs/heads/L2
committer C O Mitter <committer@example.com> 1112912473 -0700
data <<COMMIT
update L2
COMMIT
C a g
C a/e g/b
M 644 :1 g/b/h
INPUT_END
cat <<EOF >expect
g/b/f
g/b/h
EOF
test_expect_failure \
'L: nested tree copy does not corrupt deltas' \
'git fast-import <input &&
git ls-tree L2 g/b/ >tmp &&
cat tmp | cut -f 2 >actual &&
test_cmp expect actual &&
git fsck `git rev-parse L2`'
git update-ref -d refs/heads/L2
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