perf: add a comparison test of log --grep regex engines

diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 39bd5ac8fa442ba53bb54fba5296719ce6b7dbc8..fe62e7c775da6a8fc191ed1dc6634d5285ddbc4b 100755 (executable)
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -139,6 +139,12 @@ test_expect_success 'git branch -M baz bam should succeed when baz is checked ou
        test $(git rev-parse --abbrev-ref HEAD) = bam
 '
 
+test_expect_success 'git branch -M baz bam should add entries to .git/logs/HEAD' '
+       msg="Branch: renamed refs/heads/baz to refs/heads/bam" &&
+       grep " 0\{40\}.*$msg$" .git/logs/HEAD &&
+       grep "^0\{40\}.*$msg$" .git/logs/HEAD
+'
+
 test_expect_success 'git branch -M baz bam should succeed when baz is checked out as linked working tree' '
        git checkout master &&
        git worktree add -b baz bazdir &&
@@ -972,6 +978,10 @@ test_expect_success '--merged catches invalid object names' '
        test_must_fail git branch --merged 0000000000000000000000000000000000000000
 '
 
+test_expect_success '--merged is incompatible with --no-merged' '
+       test_must_fail git branch --merged HEAD --no-merged HEAD
+'
+
 test_expect_success 'tracking with unexpected .fetch refspec' '
        rm -rf a b c d &&
        git init a &&