[PATCH 10/11] midx: add test that 'expire' respects .keep files

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

From: Derrick Stolee <dstolee@microsoft.com>

The 'git multi-pack-index expire' subcommand may delete packs that
are not needed from the perspective of the multi-pack-index. If
a pack has a .keep file, then we should not delete that pack. Add
a test that ensures we preserve a pack that would otherwise be
expired. First, create a new pack that contains every object in
the repo, then add it to the multi-pack-index. Then create a .keep
file for a pack starting with "a-pack" that was added in the
previous test. Finally, expire and verify that the pack remains
and the other packs were expired.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 t/t5319-multi-pack-index.sh | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh
index 8e04ce2821..c288901401 100755
--- a/t/t5319-multi-pack-index.sh
+++ b/t/t5319-multi-pack-index.sh
@@ -510,4 +510,22 @@ test_expect_success 'expire works when adding new packs' '
 	)
 '
 
+test_expect_success 'expire respects .keep files' '
+	(
+		cd dup &&
+		git pack-objects --revs .git/objects/pack/pack-all <<-EOF &&
+		refs/heads/A
+		EOF
+		git multi-pack-index write &&
+		PACKA=$(ls .git/objects/pack/a-pack*\.pack | sed s/\.pack\$//) &&
+		touch $PACKA.keep &&
+		git multi-pack-index expire &&
+		ls -S .git/objects/pack/a-pack* | grep $PACKA >a-pack-files &&
+		test_line_count = 3 a-pack-files &&
+		test-tool read-midx .git/objects | grep idx >midx-list &&
+		test_line_count = 2 midx-list
+	)
+'
+
+
 test_done
-- 
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