[PATCH 14/24] t5313: make test hash independent

["brian m. carlson" <sandals@crustytoothpaste.net>]

Make this test hash independent by computing the length of the object
offsets and looking up values which will hash to object IDs with the
right properties.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 t/t5313-pack-bounds-checks.sh | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/t/t5313-pack-bounds-checks.sh b/t/t5313-pack-bounds-checks.sh
index f1708d415e..8d805f845a 100755
--- a/t/t5313-pack-bounds-checks.sh
+++ b/t/t5313-pack-bounds-checks.sh
@@ -38,16 +38,27 @@ munge () {
 # for the initial, and another ofs(4*nr) past that for the extended.
 #
 ofs_table () {
-	echo $((4 + 4 + 4*256 + 20*$1 + 4*$1))
+	echo $((4 + 4 + 4*256 + $(test_oid rawsz)*$1 + 4*$1))
 }
 extended_table () {
 	echo $(($(ofs_table "$1") + 4*$1))
 }
 
+test_expect_success 'setup' '
+	test_oid_init &&
+	test_oid_cache <<-EOF
+	oid000 sha1:1485
+	oid000 sha256:4222
+
+	oidfff sha1:74
+	oidfff sha256:1350
+	EOF
+'
+
 test_expect_success 'set up base packfile and variables' '
 	# the hash of this content starts with ff, which
 	# makes some later computations much simpler
-	echo 74 >file &&
+	echo $(test_oid oidfff) >file &&
 	git add file &&
 	git commit -m base &&
 	git repack -ad &&
@@ -140,10 +151,10 @@ test_expect_success 'bogus offset inside v2 extended table' '
 	# an extended table (if the first object were larger than 2^31).
 	#
 	# Note that the value is important here. We want $object as
-	# the second entry in sorted-sha1 order. The sha1 of 1485 starts
+	# the second entry in sorted-sha1 order. The hash of this object starts
 	# with "000", which sorts before that of $object (which starts
 	# with "fff").
-	second=$(echo 1485 | git hash-object -w --stdin) &&
+	second=$(test_oid oid000 | git hash-object -w --stdin) &&
 	do_pack "$object $second" --index-version=2 &&
 
 	# We have to make extra room for the table, so we cannot