reftable: add a test that verifies that writing empty keys fails

Empty keys can only be written as ref records with empty names. The log record has a logical timestamp in the key, so the key is never empty. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Han-Wen Nienhuys committed Feb 21, 2022 at 18:46 UTC 140765911050d62a23503972ef6513ef18252ad3
1 file changed +24
reftable/readwrite_test.c
+24
@@ -667,6 +667,29 @@ static void test_write_empty_table(void)
667 strbuf_release(&buf);
668 }
669
670 +static void test_write_empty_key(void)
671 +{
672 + struct reftable_write_options opts = { 0 };
673 + struct strbuf buf = STRBUF_INIT;
674 + struct reftable_writer *w =
675 + reftable_new_writer(&strbuf_add_void, &buf, &opts);
676 + struct reftable_ref_record ref = {
677 + .refname = "",
678 + .update_index = 1,
679 + .value_type = REFTABLE_REF_DELETION,
680 + };
681 + int err;
682 +
683 + reftable_writer_set_limits(w, 1, 1);
684 + err = reftable_writer_add_ref(w, &ref);
685 + EXPECT(err == REFTABLE_API_ERROR);
686 +
687 + err = reftable_writer_close(w);
688 + EXPECT(err == REFTABLE_EMPTY_TABLE_ERROR);
689 + reftable_writer_free(w);
690 + strbuf_release(&buf);
691 +}
692 +
693 static void test_write_key_order(void)
694 {
695 struct reftable_write_options opts = { 0 };
@@ -746,6 +769,7 @@ int readwrite_test_main(int argc, const char *argv[])
769 RUN_TEST(test_table_read_write_seek_index);
770 RUN_TEST(test_table_refs_for_no_index);
771 RUN_TEST(test_table_refs_for_obj_index);
772 + RUN_TEST(test_write_empty_key);
773 RUN_TEST(test_write_empty_table);
774 RUN_TEST(test_log_overflow);
775 return 0;