Added carbons command functional test

Makefile.am

@@ -101,6 +101,7 @@ functionaltest_sources = \
 	tests/functionaltests/test_presence.c tests/functionaltests/test_presence.h \
 	tests/functionaltests/test_message.c tests/functionaltests/test_message.h \
 	tests/functionaltests/test_chat_session.c tests/functionaltests/test_chat_session.h \
+	tests/functionaltests/test_carbons.c tests/functionaltests/test_carbons.h \
 	tests/functionaltests/functionaltests.c
 
 main_source = src/main.c

tests/functionaltests/functionaltests.c

@@ -15,6 +15,7 @@
 #include "test_rooms.h"
 #include "test_presence.h"
 #include "test_message.h"
+#include "test_carbons.h"
 #include "test_chat_session.h"
 
 int main(int argc, char* argv[]) {
@@ -113,6 +114,10 @@ int main(int argc, char* argv[]) {
         unit_test_setup_teardown(new_session_when_message_received_from_different_fulljid,
             init_prof_test,
             close_prof_test),
+
+        unit_test_setup_teardown(send_enable_carbons,
+            init_prof_test,
+            close_prof_test),
     };
 
     return run_tests(all_tests);

tests/functionaltests/test_carbons.c

@@ -0,0 +1,24 @@
+#include <glib.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <stabber.h>
+#include <expect.h>
+
+#include "proftest.h"
+
+void
+send_enable_carbons(void **state)
+{
+    prof_connect();
+
+    prof_input("/carbons on");
+
+    assert_true(stbbr_received(
+        "<iq id=\"*\" type=\"set\"><enable xmlns=\"urn:xmpp:carbons:2\"/></iq>"
+    ));
+}

tests/functionaltests/test_carbons.h

@@ -0,0 +1 @@
+void send_enable_carbons(void **state);