Re: [PATCH v4 01/21] fsck tests: refactor one test to use a sub-repo

Refactor one of the fsck tests to use a throwaway repository. It's a
pervasive pattern in t1450-fsck.sh to spend a lot of effort on the
teardown of a tests so we're not leaving corrupt content for the next
test.

We should instead simply use something like this test_create_repo
pattern. It's both less verbose, and makes things easier to debug as a
failing test can have their state left behind under -d without
damaging the state for other tests.

But let's punt on that general refactoring and just change this one
test, I'm going to change it further in subsequent commits.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
  t/t1450-fsck.sh | 34 ++++++++++++++++------------------
  1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 5071ac63a5b..1563b35f88c 100755
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh

@@ -48,24 +48,22 @@ remove_object () {
  	rm "$(sha1_file "$1")"
  }
  
-test_expect_success 'object with bad sha1' '
-	sha=$(echo blob | git hash-object -w --stdin) &&
-	old=$(test_oid_to_path "$sha") &&
-	new=$(dirname $old)/$(test_oid ff_2) &&
-	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 $cmt &&
-	test_when_finished "git update-ref -d refs/heads/bogus" &&
-
-	test_must_fail git fsck 2>out &&
-	test_i18ngrep "$sha.*corrupt" out
+test_expect_success 'object with hash mismatch' '
+	test_create_repo hash-mismatch &&

+	(
+		cd hash-mismatch &&
+		oid=$(echo blob | git hash-object -w --stdin) &&
+		old=$(test_oid_to_path "$oid") &&
+		new=$(dirname $old)/$(test_oid ff_2) &&
+		oid="$(dirname $new)$(basename $new)" &&
+		mv .git/objects/$old .git/objects/$new &&
+		git update-index --add --cacheinfo 100644 $oid foo &&
+		tree=$(git write-tree) &&
+		cmt=$(echo bogus | git commit-tree $tree) &&
+		git update-ref refs/heads/bogus $cmt &&
+		test_must_fail git fsck 2>out &&
+		test_i18ngrep "$oid.*corrupt" out
+	)
  '
  
  test_expect_success 'branch pointing to non-commit' '