Add test for expiring acknowledgement

This adds a test that checks if the acknowledgement expiry event does
its work.

It starts by removing all events from the event queue. We then run the
command, with expiration set in two seconds. After waiting three
seconds, we process a single event (we should have only one event in the
queue at this point). After processing the event, the acknowledgement
should be gone.

t-tap/test_commands.c

@@ -522,6 +522,16 @@ void test_host_commands(void)
 	ok(!target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE with past end_time doesn't acknowledge a host problem");
 	target_host->current_state = STATE_UP;
 
+	clear_event_queue();
+	target_host->current_state = STATE_DOWN;
+	nm_asprintf(&cmdstr, "[1234567890] ACKNOWLEDGE_HOST_PROBLEM_EXPIRE;host1;2;0;0;%llu;myself;expire in two seconds", (unsigned long long int)time(NULL)+2);
+	ok(CMD_ERROR_OK == process_external_command1(cmdstr), "core command: ACKNOWLEDGE_HOST_PROBLEM_EXPIRE");
+	ok(target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE acknowledgement present before event");
+	sleep(3);
+	event_poll();
+	ok(!target_host->problem_has_been_acknowledged, "ACKNOWLEDGE_HOST_PROBLEM_EXPIRE acknowledgement gone after event");
+	free(cmdstr);
+
 	ok(CMD_ERROR_OK == process_external_command1("[1234567890] DISABLE_HOST_EVENT_HANDLER;host1"), "core command: DISABLE_HOST_EVENT_HANDLER");
 	ok(!target_host->event_handler_enabled, "DISABLE_HOST_EVENT_HANDLER disables event handler for a host");
 
@@ -683,7 +693,7 @@ void test_core_commands(void)
 int main(int /*@unused@*/ argc, char /*@unused@*/ **arv)
 {
 	const char *test_config_file = TESTDIR "naemon.cfg";
-	plan_tests(513);
+	plan_tests(516);
 	init_event_queue();
 
 	config_file_dir = nspath_absolute_dirname(test_config_file, NULL);