From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 16:47:53 +0200
Subject: Adding upstream version 1:2.39.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 t/t5309-pack-delta-cycles.sh | 79 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100755 t/t5309-pack-delta-cycles.sh

(limited to 't/t5309-pack-delta-cycles.sh')

diff --git a/t/t5309-pack-delta-cycles.sh b/t/t5309-pack-delta-cycles.sh
new file mode 100755
index 0000000..4e910c5
--- /dev/null
+++ b/t/t5309-pack-delta-cycles.sh
@@ -0,0 +1,79 @@
+#!/bin/sh
+
+test_description='test index-pack handling of delta cycles in packfiles'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-pack.sh
+
+# Two similar-ish objects that we have computed deltas between.
+A=$(test_oid packlib_7_0)
+B=$(test_oid packlib_7_76)
+
+# double-check our hand-constucted packs
+test_expect_success 'index-pack works with a single delta (A->B)' '
+	clear_packs &&
+	{
+		pack_header 2 &&
+		pack_obj $A $B &&
+		pack_obj $B
+	} >ab.pack &&
+	pack_trailer ab.pack &&
+	git index-pack --stdin <ab.pack &&
+	git cat-file -t $A &&
+	git cat-file -t $B
+'
+
+test_expect_success 'index-pack works with a single delta (B->A)' '
+	clear_packs &&
+	{
+		pack_header 2 &&
+		pack_obj $A &&
+		pack_obj $B $A
+	} >ba.pack &&
+	pack_trailer ba.pack &&
+	git index-pack --stdin <ba.pack &&
+	git cat-file -t $A &&
+	git cat-file -t $B
+'
+
+test_expect_success 'index-pack detects missing base objects' '
+	clear_packs &&
+	{
+		pack_header 1 &&
+		pack_obj $A $B
+	} >missing.pack &&
+	pack_trailer missing.pack &&
+	test_must_fail git index-pack --fix-thin --stdin <missing.pack
+'
+
+test_expect_success 'index-pack detects REF_DELTA cycles' '
+	clear_packs &&
+	{
+		pack_header 2 &&
+		pack_obj $A $B &&
+		pack_obj $B $A
+	} >cycle.pack &&
+	pack_trailer cycle.pack &&
+	test_must_fail git index-pack --fix-thin --stdin <cycle.pack
+'
+
+test_expect_success 'failover to an object in another pack' '
+	clear_packs &&
+	git index-pack --stdin <ab.pack &&
+	test_must_fail git index-pack --stdin --fix-thin <cycle.pack
+'
+
+test_expect_success 'failover to a duplicate object in the same pack' '
+	clear_packs &&
+	{
+		pack_header 3 &&
+		pack_obj $A $B &&
+		pack_obj $B $A &&
+		pack_obj $A
+	} >recoverable.pack &&
+	pack_trailer recoverable.pack &&
+	test_must_fail git index-pack --fix-thin --stdin <recoverable.pack
+'
+
+test_done
-- 
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