tests: add trickle test

tests/trickle/Makefile

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

tests/trickle/main.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2017 HAW Hamburg
+ *
+ * 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 Trickle test application
+ *
+ * @author Cenk Gündoğan <cenk.guendogan@haw-hamburg.de>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "trickle.h"
+#include "thread.h"
+#include "msg.h"
+
+#define Q_LEN           (8)
+#define TRICKLE_MSG     (0xfeef)
+#define TR_IMIN         (8)
+#define TR_IDOUBLINGS   (20)
+#define TR_REDCONST     (10)
+
+static msg_t _msg_q[Q_LEN];
+
+static void callback(void *args)
+{
+    (void) args;
+    printf("now: %" PRIu32 "\n", xtimer_now_usec());
+    return;
+}
+
+static trickle_t trickle = { .callback.func = &callback,
+                             .callback.args = NULL };
+
+int main(void)
+{
+    msg_t msg;
+
+    msg_init_queue(_msg_q, Q_LEN);
+
+    trickle_start(sched_active_pid, &trickle, TRICKLE_MSG, TR_IMIN,
+                  TR_IDOUBLINGS, TR_REDCONST);
+
+    while (1) {
+        msg_receive(&msg);
+
+        switch (msg.type) {
+            case TRICKLE_MSG:
+                trickle_callback((trickle_t *) msg.content.ptr);
+                break;
+            default:
+                break;
+        }
+    }
+
+    return 0;
+}