Re: [PATCH v12 5/5] read-cache: speed up has_dir_name (part 2)

> diff --git a/t/t9999-test.sh b/t/t9999-test.sh
> new file mode 100755
> index 0000000000..4c802d5940
> --- /dev/null
> +++ b/t/t9999-test.sh
> @@ -0,0 +1,47 @@
> +#!/bin/sh
> +
> +test_description='test'
> +
> +. ./test-lib.sh
> +
> +test_expect_success 'file to dir breakage' '
> +	>file-to-dir &&
> +	# This sorts between "file-to-dir" as a file and "file-to-dir"
> +	# as a directory (with the trailing / appended implicitly.
> +	>file-to-dir.uh-oh &&
> +	git add file-to-dir file-to-dir.uh-oh &&
> +	git commit -m "add a file" &&
> +
> +	# Not "git rm", to preserve "file-to-dir" in the index.
> +	rm file-to-dir &&
> +	mkdir file-to-dir &&
> +	>file-to-dir/file &&
> +
> +	# It is important to add the file in the directory; adding only
> +	# the directory doesnt trigger the bug.
> +	git add file-to-dir/file &&
> +
> +	git diff --cached --no-renames --name-status >actual &&
> +
> +	cat >expect <<-\EOF &&
> +	D	file-to-dir
> +	A	file-to-dir/file
> +	EOF
> +	test_cmp expect actual
> +'
> +
> +test_expect_success 'is it committed as-is?' '
> +	git commit -m "replace file with a dir" &&
> +	git ls-tree HEAD >actual &&
> +
> +	# Hardcoded SHA-1 oid :(, because with this bug present
> +	# "git rev-parse HEAD:file-to-dir" doesnt show the oid of
> +	# the tree, but the oid of the blob that shouldnt be there.
> +	cat >expect <<-EOF &&
> +	100644 blob $EMPTY_BLOB	file-to-dir.uh-oh
> +	040000 tree df2b8fc99e1c1d4dbc0a854d9f72157f1d6ea078	file-to-dir

> +	EOF
> +	test_cmp expect actual
> +'
> +
> +test_done
>