test: add functional tests for autoping (XEP-0199)

- autoping_set_interval: verify /autoping set command
- autoping_set_zero_disables: verify disabling autoping
- autoping_timeout_set: verify /autoping timeout command
- autoping_timeout_zero_disables: verify disabling timeout
- autoping_sends_ping_after_interval: verify automatic ping IQ
- autoping_server_not_supporting_ping: verify error handling

Fast tests (command parsing) in Group 1, slow tests (timer-based) in Group 3.

tests/functionaltests/functionaltests.c

@@ -15,9 +15,9 @@
  * functional tests run less frequently than unit tests.
  *
  * Tests are organized into groups for better maintainability and parallel execution:
- *   Group 1: Connect, Ping, Rooms, Software
+ *   Group 1: Connect, Ping, Autoping (fast), Rooms, Software, Last Activity
  *   Group 2: Message, Receipts, Roster, Chat Session
- *   Group 3: Presence, Disconnect
+ *   Group 3: Presence, Disconnect, Autoping (slow)
  *   Group 4: MUC, Carbons
  *
  * Parallel execution:
@@ -53,6 +53,7 @@
 #include "test_muc.h"
 #include "test_disconnect.h"
 #include "test_lastactivity.h"
+#include "test_autoping.h"
 
 /* Macro to wrap each test with setup/teardown functions */
 #define PROF_FUNC_TEST(test) cmocka_unit_test_setup_teardown(test, init_prof_test, close_prof_test)
@@ -95,6 +96,12 @@ main(int argc, char* argv[])
         PROF_FUNC_TEST(ping_jid),
         PROF_FUNC_TEST(ping_jid_not_supported),
 
+        /* Autoping command tests - fast, no waiting */
+        PROF_FUNC_TEST(autoping_set_interval),
+        PROF_FUNC_TEST(autoping_set_zero_disables),
+        PROF_FUNC_TEST(autoping_timeout_set),
+        PROF_FUNC_TEST(autoping_timeout_zero_disables),
+
         /* Room discovery - XEP-0045 */
         PROF_FUNC_TEST(rooms_query),
 
@@ -165,6 +172,10 @@ main(int argc, char* argv[])
 
         /* Disconnect - clean session termination */
         PROF_FUNC_TEST(disconnect_ends_session),
+
+        /* Autoping slow tests - require sleep for timer triggers */
+        PROF_FUNC_TEST(autoping_sends_ping_after_interval),
+        PROF_FUNC_TEST(autoping_server_not_supporting_ping),
     };
 
     /* ============================================================