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t1450 (fsck): remove dangling objects

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The fsck test is generally careful to remove the corrupt objects
it inserts, but dangling objects are left behind due to some typos
and omissions.  It is better to clean up more completely, to
simplify the addition of later tests.  So:

 - guard setup and cleanup with test_expect_success to catch
   typos and errors;
 - check both stdout and stderr when checking for empty fsck
   output;
 - use test_cmp empty file in place of test $(wc -l <file) = 0,
   for better debugging output when running tests with -v;
 - add a remove_object () helper and use it to replace broken
   object removal code that forgot about the fanout in
   .git/objects;
 - disable gc.auto, to avoid tripping up object removal if the
   number of objects ever reaches that threshold.
 - use test_when_finished to ensure cleanup tasks are run and
   succeed when tests fail;
 - add a new final test that no breakage or dangling objects
   was left behind.

While at it, add a brief description to test_description of the
history that is expected to persist between tests.

Part of a campaign to clean up subshell usage in tests.

Cc: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-09-06 20:47:07 -05:00 committed by Junio C Hamano
parent 18a8269242
commit dbedf8bf42
1 changed files with 82 additions and 58 deletions
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140
t/t1450-fsck.sh
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@ -1,21 +1,23 @@
#!/bin/sh
test_description='git fsck random collection of tests'
test_description='git fsck random collection of tests
* (HEAD) B
* (master) A
'
. ./test-lib.sh
test_expect_success setup '
git config gc.auto 0 &&
git config i18n.commitencoding ISO-8859-1 &&
test_commit A fileA one &&
git config --unset i18n.commitencoding &&
git checkout HEAD^0 &&
test_commit B fileB two &&
git tag -d A B &&
git reflog expire --expire=now --all
'
test_expect_success 'HEAD is part of refs' '
test 0 = $(git fsck | wc -l)
git reflog expire --expire=now --all &&
>empty
'
test_expect_success 'loose objects borrowed from alternate are not missing' '
@ -25,110 +27,132 @@ test_expect_success 'loose objects borrowed from alternate are not missing' '
git init &&
echo ../../../.git/objects >.git/objects/info/alternates &&
test_commit C fileC one &&
git fsck >out &&
! grep "missing blob" out
)
git fsck >../out 2>&1
) &&
{
grep -v dangling out >actual ||
:
} &&
test_cmp empty actual
'
test_expect_success 'valid objects appear valid' '
{ git fsck 2>out; true; } &&
! grep error out &&
! grep fatal out
test_expect_success 'HEAD is part of refs, valid objects appear valid' '
git fsck >actual 2>&1 &&
test_cmp empty actual
'
# Corruption tests follow. Make sure to remove all traces of the
# specific corruption you test afterwards, lest a later test trip over
# it.
test_expect_success 'setup: helpers for corruption tests' '
sha1_file() {
echo "$*" | sed "s#..#.git/objects/&/#"
} &&
remove_object() {
file=$(sha1_file "$*") &&
test -e "$file" &&
rm -f "$file"
}
'
test_expect_success 'object with bad sha1' '
sha=$(echo blob | git hash-object -w --stdin) &&
echo $sha &&
old=$(echo $sha | sed "s+^..+&/+") &&
new=$(dirname $old)/ffffffffffffffffffffffffffffffffffffff &&
sha="$(dirname $new)$(basename $new)"
mv .git/objects/$old .git/objects/$new &&
test_when_finished "remove_object $sha" &&
git update-index --add --cacheinfo 100644 $sha foo &&
test_when_finished "git read-tree -u --reset HEAD" &&
tree=$(git write-tree) &&
test_when_finished "remove_object $tree" &&
cmt=$(echo bogus | git commit-tree $tree) &&
test_when_finished "remove_object $cmt" &&
git update-ref refs/heads/bogus $cmt &&
(git fsck 2>out; true) &&
grep "$sha.*corrupt" out &&
rm -f .git/objects/$new &&
git update-ref -d refs/heads/bogus &&
git read-tree -u --reset HEAD
test_when_finished "git update-ref -d refs/heads/bogus" &&
test_might_fail git fsck 2>out &&
cat out &&
grep "$sha.*corrupt" out
'
test_expect_success 'branch pointing to non-commit' '
git rev-parse HEAD^{tree} > .git/refs/heads/invalid &&
git rev-parse HEAD^{tree} >.git/refs/heads/invalid &&
test_when_finished "git update-ref -d refs/heads/invalid" &&
git fsck 2>out &&
grep "not a commit" out &&
git update-ref -d refs/heads/invalid
cat out &&
grep "not a commit" out
'
new=nothing
test_expect_success 'email without @ is okay' '
git cat-file commit HEAD >basis &&
sed "s/@/AT/" basis >okay &&
new=$(git hash-object -t commit -w --stdin <okay) &&
echo "$new" &&
test_when_finished "remove_object $new" &&
git update-ref refs/heads/bogus "$new" &&
test_when_finished "git update-ref -d refs/heads/bogus" &&
git fsck 2>out &&
cat out &&
! grep "error in commit $new" out
! grep "commit $new" out
'
git update-ref -d refs/heads/bogus
rm -f ".git/objects/$new"
new=nothing
test_expect_success 'email with embedded > is not okay' '
git cat-file commit HEAD >basis &&
sed "s/@[a-z]/&>/" basis >bad-email &&
new=$(git hash-object -t commit -w --stdin <bad-email) &&
echo "$new" &&
test_when_finished "remove_object $new" &&
git update-ref refs/heads/bogus "$new" &&
test_when_finished "git update-ref -d refs/heads/bogus" &&
git fsck 2>out &&
cat out &&
grep "error in commit $new" out
'
git update-ref -d refs/heads/bogus
rm -f ".git/objects/$new"
cat > invalid-tag <<EOF
object ffffffffffffffffffffffffffffffffffffffff
type commit
tag invalid
tagger T A Gger <tagger@example.com> 1234567890 -0000
This is an invalid tag.
EOF
test_expect_success 'tag pointing to nonexistent' '
tag=$(git hash-object -t tag -w --stdin < invalid-tag) &&
echo $tag > .git/refs/tags/invalid &&
cat >invalid-tag <<-\EOF
object ffffffffffffffffffffffffffffffffffffffff
type commit
tag invalid
tagger T A Gger <tagger@example.com> 1234567890 -0000
This is an invalid tag.
EOF
tag=$(git hash-object -t tag -w --stdin <invalid-tag) &&
test_when_finished "remove_object $tag" &&
echo $tag >.git/refs/tags/invalid &&
test_when_finished "git update-ref -d refs/tags/invalid" &&
test_must_fail git fsck --tags >out &&
cat out &&
grep "broken link" out &&
rm .git/refs/tags/invalid
grep "broken link" out
'
cat > wrong-tag <<EOF
object $(echo blob | git hash-object -w --stdin)
type commit
tag wrong
tagger T A Gger <tagger@example.com> 1234567890 -0000
This is an invalid tag.
EOF
test_expect_success 'tag pointing to something else than its type' '
tag=$(git hash-object -t tag -w --stdin < wrong-tag) &&
echo $tag > .git/refs/tags/wrong &&
sha=$(echo blob | git hash-object -w --stdin) &&
test_when_finished "remove_object $sha" &&
cat >wrong-tag <<-EOF &&
object $sha
type commit
tag wrong
tagger T A Gger <tagger@example.com> 1234567890 -0000
This is an invalid tag.
EOF
tag=$(git hash-object -t tag -w --stdin <wrong-tag) &&
test_when_finished "remove_object $tag" &&
echo $tag >.git/refs/tags/wrong &&
test_when_finished "git update-ref -d refs/tags/wrong" &&
test_must_fail git fsck --tags 2>out &&
cat out &&
grep "error in tag.*broken links" out &&
rm .git/refs/tags/wrong
grep "error in tag.*broken links" out
'
test_expect_success 'cleaned up' '
git fsck >actual 2>&1 &&
test_cmp empty actual
'
test_done