tests/event_periodic_callback: add test for periodic callback

tests/event_periodic_callback/Makefile

@@ -0,0 +1,6 @@
+include ../Makefile.tests_common
+
+USEMODULE += event_periodic_callback
+USEMODULE += ztimer_msec
+
+include $(RIOTBASE)/Makefile.include

tests/event_periodic_callback/main.c

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2022 ML!PA Consulting GmbH
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ * @brief       Periodic Callback test application
+ *
+ * @author      Benjamin Valentin <benjamin.valentin@ml-pa.com>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "event/periodic_callback.h"
+
+static void _event_cb(void *ctx)
+{
+    puts(ctx);
+}
+
+int main(void)
+{
+    event_periodic_callback_t a, b, c;
+
+    event_periodic_callback_init(&a, ZTIMER_MSEC, EVENT_PRIO_MEDIUM, _event_cb, "event A");
+    event_periodic_callback_init(&b, ZTIMER_MSEC, EVENT_PRIO_MEDIUM, _event_cb, "event B");
+    event_periodic_callback_init(&c, ZTIMER_MSEC, EVENT_PRIO_MEDIUM, _event_cb, "event C");
+
+    event_periodic_callback_set_count(&a, 6);
+    event_periodic_callback_set_count(&b, 3);
+    event_periodic_callback_set_count(&c, 2);
+
+    event_periodic_callback_start(&a,  502);
+    event_periodic_callback_start(&b, 1001);
+    event_periodic_callback_start(&c, 1500);
+
+    ztimer_sleep(ZTIMER_MSEC, 3020);
+
+    return 0;
+}

tests/event_periodic_callback/tests/01-run.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+import sys
+from testrunner import run
+
+
+def testfunc(child):
+    child.expect_exact("event A")
+    child.expect_exact("event B")
+    child.expect_exact("event A")
+    child.expect_exact("event C")
+    child.expect_exact("event A")
+    child.expect_exact("event B")
+    child.expect_exact("event A")
+    child.expect_exact("event A")
+    child.expect_exact("event C")
+    child.expect_exact("event B")
+    child.expect_exact("event A")
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))