t-reftable-merged: improve the test t_merged_single_record()

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>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/unit-tests/t-reftable-merged.c b/t/unit-tests/t-reftable-merged.c
index 9791f53418cc4f25f8c91cc81cfd34ccaf27831b..f4c14c5d47926b8f39703569bb317622a8ed44cc 100644 (file)
--- 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 };
-       size_t sizes[] = { ARRAY_SIZE(r1), ARRAY_SIZE(r2) };
-       struct strbuf bufs[2] = { STRBUF_INIT, STRBUF_INIT };
+       struct reftable_ref_record *refs[] = { r1, r2, r3 };
+       size_t sizes[] = { ARRAY_SIZE(r1), ARRAY_SIZE(r2), ARRAY_SIZE(r3) };
+       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]);