test-dir-iterator: do not assume errno values

diff --git a/t/t2023-checkout-m.sh b/t/t2023-checkout-m.sh
index 7e189851348d571b2e654325ba38e7564d0bc950..fca3f858245781229ea29b4baeb86e356f50a571 100755 (executable)
--- a/t/t2023-checkout-m.sh
+++ b/t/t2023-checkout-m.sh
@@ -46,4 +46,28 @@ test_expect_success '-m restores 3-way conflicted+resolved file' '
        test_cmp both.txt.conflicted.cleaned both.txt.cleaned
 '
 
+test_expect_success 'force checkout a conflict file creates stage zero entry' '
+       git init co-force &&
+       (
+               cd co-force &&
+               echo a >a &&
+               git add a &&
+               git commit -ama &&
+               A_OBJ=$(git rev-parse :a) &&
+               git branch topic &&
+               echo b >a &&
+               git commit -amb &&
+               B_OBJ=$(git rev-parse :a) &&
+               git checkout topic &&
+               echo c >a &&
+               C_OBJ=$(git hash-object a) &&
+               git checkout -m master &&
+               test_cmp_rev :1:a $A_OBJ &&
+               test_cmp_rev :2:a $B_OBJ &&
+               test_cmp_rev :3:a $C_OBJ &&
+               git checkout -f topic &&
+               test_cmp_rev :0:a $A_OBJ
+       )
+'
+
 test_done