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pack-objects tests: don't leave test .git corrupt at end

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Change the pack-objects tests to not leave their .git directory
corrupt and the end.

In 2fca19fbb5 ("fix multiple issues with t5300", 2010-02-03) a comment
was added warning against adding any subsequent tests, but since
4614043c8f ("index-pack: use streaming interface for collision test on
large blobs", 2012-05-24) the comment has drifted away from the code,
mentioning two test, when we actually have three.

Instead of having this warning let's just create a new .git directory
specifically for these tests.

As an aside, it would be interesting to instrument the test suite to
run a "git fsck" at the very end (in "test_done"). That would have
errored before this change, and may find other issues #leftoverbits.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2018-10-30 18:43:30 +00:00 committed by Junio C Hamano
parent 80938c39e2
commit 228135d9ef
1 changed files with 20 additions and 17 deletions
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37
t/t5300-pack-object.sh
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@ -468,29 +468,32 @@ test_expect_success 'pack-objects in too-many-packs mode' '
git fsck
'
#
# WARNING!
#
# The following test is destructive. Please keep the next
# two tests at the end of this file.
#
test_expect_success 'fake a SHA1 hash collision' '
long_a=$(git hash-object a | sed -e "s!^..!&/!") &&
long_b=$(git hash-object b | sed -e "s!^..!&/!") &&
test -f .git/objects/$long_b &&
cp -f .git/objects/$long_a \
.git/objects/$long_b
test_expect_success 'setup: fake a SHA1 hash collision' '
git init corrupt &&
(
cd corrupt &&
long_a=$(git hash-object -w ../a | sed -e "s!^..!&/!") &&
long_b=$(git hash-object -w ../b | sed -e "s!^..!&/!") &&
test -f .git/objects/$long_b &&
cp -f .git/objects/$long_a \
.git/objects/$long_b
)
'
test_expect_success 'make sure index-pack detects the SHA1 collision' '
test_must_fail git index-pack -o bad.idx test-3.pack 2>msg &&
test_i18ngrep "SHA1 COLLISION FOUND" msg
(
cd corrupt &&
test_must_fail git index-pack -o ../bad.idx ../test-3.pack 2>msg &&
test_i18ngrep "SHA1 COLLISION FOUND" msg
)
'
test_expect_success 'make sure index-pack detects the SHA1 collision (large blobs)' '
test_must_fail git -c core.bigfilethreshold=1 index-pack -o bad.idx test-3.pack 2>msg &&
test_i18ngrep "SHA1 COLLISION FOUND" msg
(
cd corrupt &&
test_must_fail git -c core.bigfilethreshold=1 index-pack -o ../bad.idx ../test-3.pack 2>msg &&
test_i18ngrep "SHA1 COLLISION FOUND" msg
)
'
test_done