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171bdaca JK |
1 | #!/bin/sh |
2 | ||
3 | test_description='handling of duplicate objects in incoming packfiles' | |
4 | . ./test-lib.sh | |
5 | . "$TEST_DIRECTORY"/lib-pack.sh | |
6 | ||
de5737ca | 7 | test_expect_success 'setup' ' |
8 | test_oid_cache <<-EOF | |
9 | lo_oid sha1:e68fe8129b546b101aee9510c5328e7f21ca1d18 | |
10 | lo_oid sha256:471819e8c52bf11513f100b2810a8aa0622d5cd3d1c913758a071dd4b3bad8fe | |
11 | ||
12 | missing_oid sha1:e69d000000000000000000000000000000000000 | |
13 | missing_oid sha256:4720000000000000000000000000000000000000000000000000000000000000 | |
14 | EOF | |
15 | ' | |
2bc3d126 | 16 | |
171bdaca JK |
17 | # The sha1s we have in our pack. It's important that these have the same |
18 | # starting byte, so that they end up in the same fanout section of the index. | |
19 | # That lets us make sure we are exercising the binary search with both sets. | |
de5737ca | 20 | LO_SHA1=$(test_oid lo_oid) |
21 | HI_SHA1=$EMPTY_BLOB | |
171bdaca JK |
22 | |
23 | # And here's a "missing sha1" which will produce failed lookups. It must also | |
24 | # be in the same fanout section, and should be between the two (so that during | |
25 | # our binary search, we are sure to end up looking at one or the other of the | |
26 | # duplicate runs). | |
de5737ca | 27 | MISSING_SHA1=$(test_oid missing_oid) |
171bdaca JK |
28 | |
29 | # git will never intentionally create packfiles with | |
30 | # duplicate objects, so we have to construct them by hand. | |
31 | # | |
32 | # $1 is the name of the packfile to create | |
33 | # | |
34 | # $2 is the number of times to duplicate each object | |
35 | create_pack () { | |
36 | pack_header "$((2 * $2))" >"$1" && | |
37 | for i in $(test_seq 1 "$2"); do | |
38 | pack_obj $LO_SHA1 && | |
39 | pack_obj $HI_SHA1 | |
40 | done >>"$1" && | |
41 | pack_trailer "$1" | |
42 | } | |
43 | ||
44 | # double-check that create_pack actually works | |
45 | test_expect_success 'pack with no duplicates' ' | |
46 | create_pack no-dups.pack 1 && | |
47 | git index-pack --stdin <no-dups.pack | |
48 | ' | |
49 | ||
50 | test_expect_success 'index-pack will allow duplicate objects by default' ' | |
51 | clear_packs && | |
52 | create_pack dups.pack 100 && | |
53 | git index-pack --stdin <dups.pack | |
54 | ' | |
55 | ||
56 | test_expect_success 'create batch-check test vectors' ' | |
57 | cat >input <<-EOF && | |
58 | $LO_SHA1 | |
59 | $HI_SHA1 | |
60 | $MISSING_SHA1 | |
61 | EOF | |
62 | cat >expect <<-EOF | |
63 | $LO_SHA1 blob 2 | |
64 | $HI_SHA1 blob 0 | |
65 | $MISSING_SHA1 missing | |
66 | EOF | |
67 | ' | |
68 | ||
f1068efe | 69 | test_expect_success 'lookup in duplicated pack' ' |
171bdaca JK |
70 | git cat-file --batch-check <input >actual && |
71 | test_cmp expect actual | |
72 | ' | |
73 | ||
16c159d7 JK |
74 | test_expect_success 'index-pack can reject packs with duplicates' ' |
75 | clear_packs && | |
76 | create_pack dups.pack 2 && | |
77 | test_must_fail git index-pack --strict --stdin <dups.pack && | |
78 | test_expect_code 1 git cat-file -e $LO_SHA1 | |
79 | ' | |
80 | ||
171bdaca | 81 | test_done |