ref_transaction_commit(): fix atomicity and avoid fd exhaustion

diff --git a/t/t3203-branch-output.sh b/t/t3203-branch-output.sh
index 76fe7e0060c20507cb6eb317451b69a2a0c9146d..f51d0f3cadcb4f97f4cf9f2d79aad9ed401781d8 100755 (executable)
--- a/t/t3203-branch-output.sh
+++ b/t/t3203-branch-output.sh
@@ -94,16 +94,53 @@ test_expect_success 'git branch -v pattern does not show branch summaries' '
        test_must_fail git branch -v branch*
 '
 
-cat >expect <<'EOF'
-* (no branch)
+test_expect_success 'git branch shows detached HEAD properly' '
+       cat >expect <<EOF &&
+* (HEAD detached at $(git rev-parse --short HEAD^0))
   branch-one
   branch-two
   master
 EOF
-test_expect_success 'git branch shows detached HEAD properly' '
        git checkout HEAD^0 &&
        git branch >actual &&
        test_i18ncmp expect actual
 '
 
+test_expect_success 'git branch shows detached HEAD properly after moving' '
+       cat >expect <<EOF &&
+* (HEAD detached from $(git rev-parse --short HEAD))
+  branch-one
+  branch-two
+  master
+EOF
+       git reset --hard HEAD^1 &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
+test_expect_success 'git branch shows detached HEAD properly from tag' '
+       cat >expect <<EOF &&
+* (HEAD detached at fromtag)
+  branch-one
+  branch-two
+  master
+EOF
+       git tag fromtag master &&
+       git checkout fromtag &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
+test_expect_success 'git branch shows detached HEAD properly after moving from tag' '
+       cat >expect <<EOF &&
+* (HEAD detached from fromtag)
+  branch-one
+  branch-two
+  master
+EOF
+       git reset --hard HEAD^1 &&
+       git branch >actual &&
+       test_i18ncmp expect actual
+'
+
 test_done