testsuite: add test for hash_add_unique
diff --git a/testsuite/test-hash.c b/testsuite/test-hash.c
index 3cf5ba7..c1aa1eb 100644
--- a/testsuite/test-hash.c
+++ b/testsuite/test-hash.c
@@ -220,4 +220,30 @@
DEFINE_TEST(test_hash_free,
.description = "test hash_free calling free function for all values");
+
+static int test_hash_add_unique(const struct test *t)
+{
+ const char *k[] = { "k1", "k2", "k3", "k4", "k5" };
+ const char *v[] = { "v1", "v2", "v3", "v4", "v5" };
+ unsigned int i, j, N;
+
+ N = ARRAY_SIZE(k);
+ for (i = 0; i < N; i++) {
+ /* With N - 1 buckets, there'll be a bucket with more than one key. */
+ struct hash *h = hash_new(N - 1, NULL);
+
+ /* Add the keys in different orders. */
+ for (j = 0; j < N; j++) {
+ unsigned int idx = (j + i) % N;
+ hash_add_unique(h, k[idx], v[idx]);
+ }
+
+ assert_return(hash_get_count(h) == N, EXIT_FAILURE);
+ hash_free(h);
+ }
+ return 0;
+}
+DEFINE_TEST(test_hash_add_unique,
+ .description = "test hash_add_unique with different key orders")
+
TESTSUITE_MAIN();