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16c159d75a
Commit 68be2fea (receive-pack, fetch-pack: reject bogus pack that
records objects twice, 2011-11-16) taught index-pack to notice and
reject duplicate objects if --strict is given (which it is for
incoming packs, if transfer.fsckObjects is set). However, it never
tested the code, because we did not have an easy way of generating
such a bogus pack.
Now that we have test infrastructure to handle this, let's confirm
that it works.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
80 lines
2.2 KiB
Bash
Executable file
80 lines
2.2 KiB
Bash
Executable file
#!/bin/sh
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test_description='handling of duplicate objects in incoming packfiles'
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-pack.sh
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# The sha1s we have in our pack. It's important that these have the same
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# starting byte, so that they end up in the same fanout section of the index.
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# That lets us make sure we are exercising the binary search with both sets.
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LO_SHA1=e68fe8129b546b101aee9510c5328e7f21ca1d18
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HI_SHA1=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
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# And here's a "missing sha1" which will produce failed lookups. It must also
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# be in the same fanout section, and should be between the two (so that during
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# our binary search, we are sure to end up looking at one or the other of the
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# duplicate runs).
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MISSING_SHA1='e69d000000000000000000000000000000000000'
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# git will never intentionally create packfiles with
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# duplicate objects, so we have to construct them by hand.
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#
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# $1 is the name of the packfile to create
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#
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# $2 is the number of times to duplicate each object
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create_pack () {
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pack_header "$((2 * $2))" >"$1" &&
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for i in $(test_seq 1 "$2"); do
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pack_obj $LO_SHA1 &&
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pack_obj $HI_SHA1
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done >>"$1" &&
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pack_trailer "$1"
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}
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# double-check that create_pack actually works
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test_expect_success 'pack with no duplicates' '
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create_pack no-dups.pack 1 &&
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git index-pack --stdin <no-dups.pack
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'
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test_expect_success 'index-pack will allow duplicate objects by default' '
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clear_packs &&
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create_pack dups.pack 100 &&
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git index-pack --stdin <dups.pack
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'
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test_expect_success 'create batch-check test vectors' '
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cat >input <<-EOF &&
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$LO_SHA1
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$HI_SHA1
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$MISSING_SHA1
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EOF
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cat >expect <<-EOF
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$LO_SHA1 blob 2
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$HI_SHA1 blob 0
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$MISSING_SHA1 missing
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EOF
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'
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test_expect_success 'lookup in duplicated pack (binary search)' '
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git cat-file --batch-check <input >actual &&
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test_cmp expect actual
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'
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test_expect_success 'lookup in duplicated pack (GIT_USE_LOOKUP)' '
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(
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GIT_USE_LOOKUP=1 &&
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export GIT_USE_LOOKUP &&
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git cat-file --batch-check <input >actual
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) &&
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test_cmp expect actual
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'
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test_expect_success 'index-pack can reject packs with duplicates' '
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clear_packs &&
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create_pack dups.pack 2 &&
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test_must_fail git index-pack --strict --stdin <dups.pack &&
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test_expect_code 1 git cat-file -e $LO_SHA1
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'
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test_done
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