t4200: make "rerere gc" test more robust

diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index 1a080e782371e2d7ad489c706a54fce1553b9579..1e23031cdbb8c849d00b7047c0aff3a44d479d65 100755 (executable)
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -420,19 +420,28 @@ count_pre_post () {
 }
 
 test_expect_success 'rerere gc' '
-       find .git/rr-cache -type f >original &&
-       xargs test-chmtime -172800 <original &&
+       rm -fr .git/rr-cache &&
+       rr=.git/rr-cache/$_z40 &&
+       mkdir -p "$rr" &&
+       >"$rr/preimage" &&
+       >"$rr/postimage" &&
+
+       two_days_ago=$((-2*86400)) &&
+       test-chmtime =$two_days_ago "$rr/preimage" &&
+       test-chmtime =$two_days_ago "$rr/postimage" &&
+
+       find .git/rr-cache -type f | sort >original &&
 
        git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
-       find .git/rr-cache -type f >actual &&
+       find .git/rr-cache -type f | sort >actual &&
        test_cmp original actual &&
 
        git -c gc.rerereresolved=5 -c gc.rerereunresolved=0 rerere gc &&
-       find .git/rr-cache -type f >actual &&
+       find .git/rr-cache -type f | sort >actual &&
        test_cmp original actual &&
 
        git -c gc.rerereresolved=0 -c gc.rerereunresolved=0 rerere gc &&
-       find .git/rr-cache -type f >actual &&
+       find .git/rr-cache -type f | sort >actual &&
        >expect &&
        test_cmp expect actual
 '
@@ -446,6 +455,8 @@ merge_conflict_resolve () {
 }
 
 test_expect_success 'multiple identical conflicts' '
+       rm -fr .git/rr-cache &&
+       mkdir .git/rr-cache &&
        git reset --hard &&
 
        test_seq 1 6 >early &&