test: add helper functions for git-bundle

Move git-bundle related functions from t5510 to a library, and this lib
will be shared with a new testcase t6020 which finds a known breakage of
"git-bundle".

Signed-off-by: Jiang Xin <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: jiangxin

t/t5510-fetch.sh

@@ -6,22 +6,10 @@ test_description='Per branch config variables affects "git fetch".
 '
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/test-bundle-functions.sh
 
 D=$(pwd)
 
-test_bundle_object_count () {
-	git verify-pack -v "$1" >verify.out &&
-	test "$2" = $(grep "^$OID_REGEX " verify.out | wc -l)
-}
-
-convert_bundle_to_pack () {
-	while read x && test -n "$x"
-	do
-		:;
-	done
-	cat
-}
-
 test_expect_success setup '
 	echo >file original &&
 	git add file &&
@@ -312,9 +300,7 @@ test_expect_success 'unbundle 1' '
 
 test_expect_success 'bundle 1 has only 3 files ' '
 	cd "$D" &&
-	convert_bundle_to_pack <bundle1 >bundle.pack &&
-	git index-pack bundle.pack &&
-	test_bundle_object_count bundle.pack 3
+	test_bundle_object_count bundle1 3
 '
 
 test_expect_success 'unbundle 2' '
@@ -329,9 +315,7 @@ test_expect_success 'bundle does not prerequisite objects' '
 	git add file2 &&
 	git commit -m add.file2 file2 &&
 	git bundle create bundle3 -1 HEAD &&
-	convert_bundle_to_pack <bundle3 >bundle.pack &&
-	git index-pack bundle.pack &&
-	test_bundle_object_count bundle.pack 3
+	test_bundle_object_count bundle3 3
 '
 
 test_expect_success 'bundle should be able to create a full history' '
@@ -884,9 +868,7 @@ test_expect_success 'all boundary commits are excluded' '
 	git merge otherside &&
 	ad=$(git log --no-walk --format=%ad HEAD) &&
 	git bundle create twoside-boundary.bdl main --since="$ad" &&
-	convert_bundle_to_pack <twoside-boundary.bdl >twoside-boundary.pack &&
-	pack=$(git index-pack --fix-thin --stdin <twoside-boundary.pack) &&
-	test_bundle_object_count .git/objects/pack/pack-${pack##pack	}.pack 3
+	test_bundle_object_count --thin twoside-boundary.bdl 3
 '
 
 test_expect_success 'fetch --prune prints the remotes url' '