test for unparsed client hello

tests/unit/s2n_client_hello_get_supported_groups_test.c

@@ -99,7 +99,13 @@ int main(int argc, char **argv)
 
     /* Ensure that s2n_client_hello_get_supported_groups fails before the client hello is parsed. */
     {
-
+        struct s2n_client_hello client_hello = { 0 };
+
+        uint16_t supported_groups[TEST_SUPPORTED_GROUPS_LIST_COUNT] = { 0 };
+        uint16_t supported_groups_count = 0;
+        EXPECT_FAILURE_WITH_ERRNO(s2n_client_hello_get_supported_groups(&client_hello, supported_groups, &supported_groups_count,
+                                          s2n_array_len(supported_groups)),
+                S2N_ERR_NULL);
     }
 
     /* Ensure that s2n_client_hello_get_supported_groups fails if a supported groups extension
@@ -233,8 +239,8 @@ int main(int argc, char **argv)
     }
 
     /* Ensure that s2n_client_hello_get_supported_groups writes what is contained in the parsed
-         * supported groups extension in the client hello.
-         */
+     * supported groups extension in the client hello.
+     */
     {
         struct s2n_client_hello client_hello = { 0 };
 
@@ -274,7 +280,6 @@ int main(int argc, char **argv)
             for (size_t i = 0; i < supported_groups_count; i++) {
                 uint16_t test_group = 0;
                 EXPECT_SUCCESS(s2n_stuffer_read_uint16(&test_groups_list_stuffer, &test_group));
-
                 uint16_t written_group = supported_groups[i];
 
                 EXPECT_EQUAL(test_group, written_group);
@@ -283,10 +288,10 @@ int main(int argc, char **argv)
     }
 
     /* Self-talk: Ensure that the retrieved supported groups match what was sent by the client.
-         *
-         * This test also ensures that s2n_client_hello_get_supported_groups is usable from within
-         * the client hello callback.
-         */
+     *
+     * This test also ensures that s2n_client_hello_get_supported_groups is usable from within
+     * the client hello callback.
+     */
     {
 
     }