[PATCH v2 13/15] t6500: extract objects with "17" prefix

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The ".git/obects/17/" shard is somewhat special because it is used by
git-gc(1) to estimate how many objects there are by extrapolating the
number of objects in that shard, only. In t6500 we thus have a hard
coded set of data that, when written to the object database, result in
blobs starting with that prefix.

We are about to need such "17"-prefixed objects in another test suite.
Extract them into "t/oid-info/hash-info" so that they can be reused by
other tests.

Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
 t/oid-info/hash-info | 12 ++++++++++++
 t/t6500-gc.sh        | 30 +++++++-----------------------
 2 files changed, 19 insertions(+), 23 deletions(-)

diff --git a/t/oid-info/hash-info b/t/oid-info/hash-info
index d0736dd1a0..b8a5bcb187 100644
--- a/t/oid-info/hash-info
+++ b/t/oid-info/hash-info
@@ -15,3 +15,15 @@ empty_blob sha256:473a0f4c3be8a93681a267e3b1e9a7dcda1185436fe141f7749120a3037218
 
 empty_tree sha1:4b825dc642cb6eb9a060e54bf8d69288fbee4904
 empty_tree sha256:6ef19b41225c5369f1c104d45d8d85efa9b057b53b14b4b9b939dd74decc5321
+
+blob17_1 sha1:263
+blob17_1 sha256:34
+
+blob17_2 sha1:410
+blob17_2 sha256:174
+
+blob17_3 sha1:523
+blob17_3 sha256:313
+
+blob17_4 sha1:790
+blob17_4 sha256:481
diff --git a/t/t6500-gc.sh b/t/t6500-gc.sh
index 18fe1c25e6..43d40175f8 100755
--- a/t/t6500-gc.sh
+++ b/t/t6500-gc.sh
@@ -11,23 +11,7 @@ test_expect_success 'setup' '
 	# behavior, make sure we always pack everything to one pack by
 	# default
 	git config gc.bigPackThreshold 2g &&
-
-	# These are simply values which, when hashed as a blob with a newline,
-	# produce a hash where the first byte is 0x17 in their respective
-	# algorithms.
-	test_oid_cache <<-EOF
-	obj1 sha1:263
-	obj1 sha256:34
-
-	obj2 sha1:410
-	obj2 sha256:174
-
-	obj3 sha1:523
-	obj3 sha256:313
-
-	obj4 sha1:790
-	obj4 sha256:481
-	EOF
+	test_oid_init
 '
 
 test_expect_success 'gc empty repository' '
@@ -114,8 +98,8 @@ test_expect_success 'pre-auto-gc hook can stop auto gc' '
 		# We need to create two object whose sha1s start with 17
 		# since this is what git gc counts.  As it happens, these
 		# two blobs will do so.
-		test_commit "$(test_oid obj1)" &&
-		test_commit "$(test_oid obj2)" &&
+		test_commit "$(test_oid blob17_1)" &&
+		test_commit "$(test_oid blob17_2)" &&
 
 		git gc --auto >../out.actual 2>../err.actual
 	) &&
@@ -146,13 +130,13 @@ test_expect_success 'auto gc with too many loose objects does not attempt to cre
 	# We need to create two object whose sha1s start with 17
 	# since this is what git gc counts.  As it happens, these
 	# two blobs will do so.
-	test_commit "$(test_oid obj1)" &&
-	test_commit "$(test_oid obj2)" &&
+	test_commit "$(test_oid blob17_1)" &&
+	test_commit "$(test_oid blob17_2)" &&
 	# Our first gc will create a pack; our second will create a second pack
 	git gc --auto &&
 	ls .git/objects/pack/pack-*.pack | sort >existing_packs &&
-	test_commit "$(test_oid obj3)" &&
-	test_commit "$(test_oid obj4)" &&
+	test_commit "$(test_oid blob17_3)" &&
+	test_commit "$(test_oid blob17_4)" &&
 
 	git gc --auto 2>err &&
 	test_grep ! "^warning:" err &&
-- 
2.44.GIT

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