[PATCH 25/30] t5502: add PACKED_REFS_V1 prerequisite

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <derrickstolee@github.com>

The last test in t5502-quickfetch.sh exploits the packed-refs v1 file
format by appending 1000 lines to the packed-refs file. If the
packed-refs file is in the v2 format, this corrupts the file as
unreadable.

Instead of making the test slower, let's ignore it when
GIT_TEST_PACKED_REFS_VERSION=2. The test is really about 'git fetch',
not the packed-refs format. Create a prerequisite in case we want to use
this technique again in the future.

An alternative would be to write those 1000 refs using a different
mechanism, but let's opt for the simpler case for now.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
 t/t5502-quickfetch.sh | 2 +-
 t/test-lib.sh         | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/t/t5502-quickfetch.sh b/t/t5502-quickfetch.sh
index b160f8b7fb7..0c4aadebae6 100755
--- a/t/t5502-quickfetch.sh
+++ b/t/t5502-quickfetch.sh
@@ -122,7 +122,7 @@ test_expect_success 'quickfetch should not copy from alternate' '
 
 '
 
-test_expect_success 'quickfetch should handle ~1000 refs (on Windows)' '
+test_expect_success PACKED_REFS_V1 'quickfetch should handle ~1000 refs (on Windows)' '
 
 	git gc &&
 	head=$(git rev-parse HEAD) &&
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 6db377f68b8..a244cd75c06 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1954,3 +1954,7 @@ test_lazy_prereq FSMONITOR_DAEMON '
 	git version --build-options >output &&
 	grep "feature: fsmonitor--daemon" output
 '
+
+test_lazy_prereq PACKED_REFS_V1 '
+	test "$GIT_TEST_PACKED_REFS_VERSION" -ne "2"
+'
\ No newline at end of file
-- 
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