1 files changed, 46 insertions, 0 deletions
diff --git a/t/t5334-incremental-multi-pack-index.sh b/t/t5334-incremental-multi-pack-index.sh
new file mode 100755
index 0000000000..c3b08acc73
--- /dev/null
+++ b/t/t5334-incremental-multi-pack-index.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+test_description='incremental multi-pack-index'
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-midx.sh
+
+GIT_TEST_MULTI_PACK_INDEX=0
+export GIT_TEST_MULTI_PACK_INDEX
+
+objdir=.git/objects
+packdir=$objdir/pack
+midxdir=$packdir/multi-pack-index.d
+midx_chain=$midxdir/multi-pack-index-chain
+
+test_expect_success 'convert non-incremental MIDX to incremental' '
+	test_commit base &&
+	git repack -ad &&
+	git multi-pack-index write &&
+
+	test_path_is_file $packdir/multi-pack-index &&
+	old_hash="$(midx_checksum $objdir)" &&
+
+	test_commit other &&
+	git repack -d &&
+	git multi-pack-index write --incremental &&
+
+	test_path_is_missing $packdir/multi-pack-index &&
+	test_path_is_file $midx_chain &&
+	test_line_count = 2 $midx_chain &&
+	grep $old_hash $midx_chain
+'
+
+compare_results_with_midx 'incremental MIDX'
+
+test_expect_success 'convert incremental to non-incremental' '
+	test_commit squash &&
+	git repack -d &&
+	git multi-pack-index write &&
+
+	test_path_is_file $packdir/multi-pack-index &&
+	test_dir_is_empty $midxdir
+'
+
+compare_results_with_midx 'non-incremental MIDX conversion'
+
+test_done