[PATCH v5 6/7] t-reftable-stack: add test for stack iterators

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reftable_stack_init_ref_iterator and reftable_stack_init_log_iterator
as defined by reftable/stack.{c,h} initialize a stack iterator to
iterate over the ref and log records in a reftable stack respectively.
Since these functions are not exercised by any of the existing tests,
add a test for them.

Mentored-by: Patrick Steinhardt <ps@xxxxxx>
Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Signed-off-by: Chandra Pratap <chandrapratap3519@xxxxxxxxx>
---
 t/unit-tests/t-reftable-stack.c | 83 +++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/t/unit-tests/t-reftable-stack.c b/t/unit-tests/t-reftable-stack.c
index 4acf07ab0c..d62a9c1bed 100644
--- a/t/unit-tests/t-reftable-stack.c
+++ b/t/unit-tests/t-reftable-stack.c
@@ -544,6 +544,88 @@ static void t_reftable_stack_add(void)
 	clear_dir(dir);
 }
 
+static void t_reftable_stack_iterator(void)
+{
+	struct reftable_write_options opts = { 0 };
+	struct reftable_stack *st = NULL;
+	char *dir = get_tmp_dir(__LINE__);
+	struct reftable_ref_record refs[10] = { 0 };
+	struct reftable_log_record logs[10] = { 0 };
+	struct reftable_iterator it = { 0 };
+	size_t N = ARRAY_SIZE(refs), i;
+	int err;
+
+	err = reftable_new_stack(&st, dir, &opts);
+	check(!err);
+
+	for (i = 0; i < N; i++) {
+		refs[i].refname = xstrfmt("branch%02"PRIuMAX, (uintmax_t)i);
+		refs[i].update_index = i + 1;
+		refs[i].value_type = REFTABLE_REF_VAL1;
+		set_test_hash(refs[i].value.val1, i);
+
+		logs[i].refname = xstrfmt("branch%02"PRIuMAX, (uintmax_t)i);
+		logs[i].update_index = i + 1;
+		logs[i].value_type = REFTABLE_LOG_UPDATE;
+		logs[i].value.update.email = xstrdup("johndoe@invalid");
+		logs[i].value.update.message = xstrdup("commit\n");
+		set_test_hash(logs[i].value.update.new_hash, i);
+	}
+
+	for (i = 0; i < N; i++) {
+		err = reftable_stack_add(st, write_test_ref, &refs[i]);
+		check(!err);
+	}
+
+	for (i = 0; i < N; i++) {
+		struct write_log_arg arg = {
+			.log = &logs[i],
+			.update_index = reftable_stack_next_update_index(st),
+		};
+
+		err = reftable_stack_add(st, write_test_log, &arg);
+		check(!err);
+	}
+
+	reftable_stack_init_ref_iterator(st, &it);
+	reftable_iterator_seek_ref(&it, refs[0].refname);
+	for (i = 0; ; i++) {
+		struct reftable_ref_record ref = { 0 };
+
+		err = reftable_iterator_next_ref(&it, &ref);
+		if (err > 0)
+			break;
+		check(!err);
+		check(reftable_ref_record_equal(&ref, &refs[i], GIT_SHA1_RAWSZ));
+		reftable_ref_record_release(&ref);
+	}
+	check_int(i, ==, N);
+
+	reftable_iterator_destroy(&it);
+
+	reftable_stack_init_log_iterator(st, &it);
+	reftable_iterator_seek_log(&it, logs[0].refname);
+	for (i = 0; ; i++) {
+		struct reftable_log_record log = { 0 };
+
+		err = reftable_iterator_next_log(&it, &log);
+		if (err > 0)
+			break;
+		check(!err);
+		check(reftable_log_record_equal(&log, &logs[i], GIT_SHA1_RAWSZ));
+		reftable_log_record_release(&log);
+	}
+	check_int(i, ==, N);
+
+	reftable_stack_destroy(st);
+	reftable_iterator_destroy(&it);
+	for (i = 0; i < N; i++) {
+		reftable_ref_record_release(&refs[i]);
+		reftable_log_record_release(&logs[i]);
+	}
+	clear_dir(dir);
+}
+
 static void t_reftable_stack_log_normalize(void)
 {
 	int err = 0;
@@ -1225,6 +1307,7 @@ int cmd_main(int argc UNUSED, const char *argv[] UNUSED)
 	TEST(t_reftable_stack_compaction_concurrent_clean(), "compaction with unclean stack shutdown");
 	TEST(t_reftable_stack_compaction_with_locked_tables(), "compaction with locked tables");
 	TEST(t_reftable_stack_hash_id(), "read stack with wrong hash ID");
+	TEST(t_reftable_stack_iterator(), "log and ref iterator for reftable stack");
 	TEST(t_reftable_stack_lock_failure(), "stack addition with lockfile failure");
 	TEST(t_reftable_stack_log_normalize(), "log messages should be normalized");
 	TEST(t_reftable_stack_read_across_reload(), "stack iterators work across reloads");
-- 
2.45.GIT





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