tests: simulation of cache storage engine initialization failure at kr_cache_open()

diff --git a/tests/test_cache.c b/tests/test_cache.c
index a72e98b9b0c5df26ebfb1f06c6c8c9b80647b26c..dcefaf21447722351d7321862aba506c9edf8b40 100644 (file)
--- a/tests/test_cache.c
+++ b/tests/test_cache.c
@@ -30,6 +30,27 @@ const char *global_env;
 #define CACHE_TTL 10
 #define CACHE_TIME 0
 
+/* Simulate init failure*/
+static int test_init_failure(namedb_t **db_ptr, mm_ctx_t *mm, void *arg)
+{
+       return KNOT_EINVAL;
+}
+
+/* Fake api to simulate failures */
+static const namedb_api_t *namedb_lmdb_api_fake(void)
+{
+       static const namedb_api_t api_fake = {
+               "lmdb_api_fake",
+               test_init_failure, NULL,
+               NULL, NULL, NULL,
+               NULL, NULL, NULL, NULL, NULL,
+               NULL, NULL, NULL, NULL, NULL, NULL
+       };
+
+       return &api_fake;
+}
+
+
 /* Test invalid parameters. */
 static void test_invalid(void **state)
 {
@@ -50,9 +71,21 @@ static void test_invalid(void **state)
 static void test_open(void **state)
 {
        struct namedb_lmdb_opts opts;
+       const namedb_api_t *(*kr_cache_storage_saved)(void);
+
        memset(&opts, 0, sizeof(opts));
        opts.path = global_env;
        opts.mapsize = CACHE_SIZE;
+
+       /* save original api */
+       kr_cache_storage_saved = kr_cache_storage;
+       /* fake to simulate initialization failure */
+       kr_cache_storage_set(namedb_lmdb_api_fake);
+       *state = kr_cache_open(&opts, &global_mm);
+       /* restore */
+       kr_cache_storage_set(kr_cache_storage_saved);
+       assert_null(*state);
+
        *state = kr_cache_open(&opts, &global_mm);
        assert_non_null(*state);
 }