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-rwxr-xr-xt/t5309-pack-delta-cycles.sh79
1 files changed, 79 insertions, 0 deletions
diff --git a/t/t5309-pack-delta-cycles.sh b/t/t5309-pack-delta-cycles.sh
new file mode 100755
index 0000000..4e910c5
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+++ 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