[PATCH v2 3/7] t-reftable-merged: improve the test t_merged_single_record()

[Chandra Pratap <chandrapratap3519@gmail.com>]

In t-reftable-merged.c, the test t_merged_single_record() ensures
that a ref ('a') which occurs in only one of the records ('r2')
can be retrieved. Improve this test by adding another record 'r3'
to ensure that ref 'a' only occurs in 'r2' and that merged tables
don't simply read the last record.

Mentored-by: Patrick Steinhardt <ps@pks.im>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Chandra Pratap <chandrapratap3519@gmail.com>
---
 t/unit-tests/t-reftable-merged.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/t/unit-tests/t-reftable-merged.c b/t/unit-tests/t-reftable-merged.c
index a984116619..85ebb96aaa 100644
--- a/t/unit-tests/t-reftable-merged.c
+++ b/t/unit-tests/t-reftable-merged.c
@@ -136,14 +136,19 @@ static void t_merged_single_record(void)
 		.update_index = 2,
 		.value_type = REFTABLE_REF_DELETION,
 	} };
+	struct reftable_ref_record r3[] = { {
+		.refname = (char *) "c",
+		.update_index = 3,
+		.value_type = REFTABLE_REF_DELETION,
+	} };
 
-	struct reftable_ref_record *refs[] = { r1, r2 };
-	int sizes[] = { 1, 1 };
-	struct strbuf bufs[2] = { STRBUF_INIT, STRBUF_INIT };
+	struct reftable_ref_record *refs[] = { r1, r2, r3 };
+	int sizes[] = { 1, 1, 1 };
+	struct strbuf bufs[3] = { STRBUF_INIT, STRBUF_INIT, STRBUF_INIT };
 	struct reftable_block_source *bs = NULL;
 	struct reftable_reader **readers = NULL;
 	struct reftable_merged_table *mt =
-		merged_table_from_records(refs, &bs, &readers, sizes, bufs, 2);
+		merged_table_from_records(refs, &bs, &readers, sizes, bufs, 3);
 	struct reftable_ref_record ref = { 0 };
 	struct reftable_iterator it = { 0 };
 	int err;
@@ -157,7 +162,7 @@ static void t_merged_single_record(void)
 	check_int(ref.update_index, ==, 2);
 	reftable_ref_record_release(&ref);
 	reftable_iterator_destroy(&it);
-	readers_destroy(readers, 2);
+	readers_destroy(readers, 3);
 	reftable_merged_table_free(mt);
 	for (size_t i = 0; i < ARRAY_SIZE(bufs); i++)
 		strbuf_release(&bufs[i]);
-- 
2.45.2.404.g9eaef5822c