tests: add tests for 6LN NDP behavior

tests/gnrc_ipv6_nib_6ln/Makefile

+# name of your application
+APPLICATION = gnrc_ipv6_nib_6ln
+include ../Makefile.tests_common
+
+BOARD_INSUFFICIENT_MEMORY := chronos nucleo-f030 nucleo-l053 nucleo32-f031
+                             nucleo32-l031 nucleo32-f042 stm32f0discovery
+
+USEMODULE += gnrc_ipv6
+USEMODULE += gnrc_sixlowpan
+USEMODULE += gnrc_ipv6_nib_6ln
+USEMODULE += embunit
+USEMODULE += netopt
+
+CFLAGS += -DDEVELHELP
+CFLAGS += -DGNRC_NETTYPE_NDP2=GNRC_NETTYPE_TEST
+CFLAGS += -DGNRC_PKTBUF_SIZE=512
+CFLAGS += -DTEST_SUITES
+
+include $(RIOTBASE)/Makefile.include
+
+test:
+# `testrunner` calls `make term` recursively, results in duplicated `TERMFLAGS`.
+# So clears `TERMFLAGS` before run.
+	TERMFLAGS= tests/01-run.py

tests/gnrc_ipv6_nib_6ln/common.h

+/*
+ * Copyright (C) 2017 Freie Universität Berlin
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup    tests_gnrc_ipv6_nib Common header for GNRC's NIB tests
+ * @ingroup     tests
+ * @brief       Common definitions for GNRC's NIB tests
+ * @{
+ *
+ * @file
+ *
+ * @author  Martine Lenders <m.lenders@fu-berlin.de>
+ */
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <stdio.h>
+
+#include "net/gnrc.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define _CALL(fn)   _common_set_up(); _set_up(); puts("Calling " # fn); fn()
+
+extern kernel_pid_t _mock_netif_pid;
+
+void _tests_init(void);
+int _mock_netif_get(gnrc_netapi_opt_t *opt);
+void _common_set_up(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* COMMON_H */
+/** @} */

tests/gnrc_ipv6_nib_6ln/mockup_netif.c

+/*
+ * Copyright (C) 2017 Freie Universität Berlin
+ *
+ * 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.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ * @author  Martine Lenders <m.lenders@fu-berlin.de>
+ */
+
+#include "common.h"
+#include "msg.h"
+#include "net/gnrc.h"
+#include "net/gnrc/ipv6/nib.h"
+#include "net/gnrc/ipv6/netif.h"
+#include "net/gnrc/netdev.h"
+#include "sched.h"
+#include "thread.h"
+
+#define _MSG_QUEUE_SIZE  (2)
+
+kernel_pid_t _mock_netif_pid = KERNEL_PID_UNDEF;
+
+static char _mock_netif_stack[THREAD_STACKSIZE_DEFAULT];
+static gnrc_netreg_entry_t dumper;
+static msg_t _main_msg_queue[_MSG_QUEUE_SIZE];
+static msg_t _mock_netif_msg_queue[_MSG_QUEUE_SIZE];
+
+static void *_mock_netif_thread(void *args)
+{
+    msg_t msg, reply = { .type = GNRC_NETAPI_MSG_TYPE_ACK };
+
+    (void)args;
+    msg_init_queue(_mock_netif_msg_queue, _MSG_QUEUE_SIZE);
+    while (1) {
+        msg_receive(&msg);
+        switch (msg.type) {
+            case GNRC_NETAPI_MSG_TYPE_GET:
+                reply.content.value = (uint32_t)_mock_netif_get(msg.content.ptr);
+                break;
+            case GNRC_NETAPI_MSG_TYPE_SET:
+                reply.content.value = (uint32_t)(-ENOTSUP);
+                break;
+            case GNRC_NETAPI_MSG_TYPE_SND:
+            case GNRC_NETAPI_MSG_TYPE_RCV:
+                gnrc_pktbuf_release(msg.content.ptr);
+        }
+        msg_reply(&msg, &reply);
+    }
+    return NULL;
+}
+
+void _common_set_up(void)
+{
+    gnrc_ipv6_nib_init();
+    gnrc_ipv6_nib_init_iface(_mock_netif_pid);
+}
+
+void _tests_init(void)
+{
+    msg_init_queue(_main_msg_queue, _MSG_QUEUE_SIZE);
+    _mock_netif_pid = thread_create(_mock_netif_stack,
+                                    sizeof(_mock_netif_stack),
+                                    GNRC_NETDEV_MAC_PRIO,
+                                    THREAD_CREATE_STACKTEST,
+                                    _mock_netif_thread, NULL, "mock_netif");
+    assert(_mock_netif_pid > KERNEL_PID_UNDEF);
+    gnrc_netif_add(_mock_netif_pid);
+    gnrc_ipv6_netif_init_by_dev();
+    thread_yield();
+    gnrc_netreg_entry_init_pid(&dumper, GNRC_NETREG_DEMUX_CTX_ALL,
+                               sched_active_pid);
+    gnrc_netreg_register(GNRC_NETTYPE_NDP2, &dumper);
+}
+
+/** @} */

tests/gnrc_ipv6_nib_6ln/tests/01-run.py

+#!/usr/bin/env python3
+
+# Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
+# Copyright (C) 2016 Takuo Yonezawa <Yonezawa-T2@mail.dnp.co.jp>
+#
+# 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.
+
+import os
+import sys
+
+sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
+import testrunner
+
+def testfunc(child):
+    child.expect(r"OK \(\d+ tests\)")
+
+if __name__ == "__main__":
+    sys.exit(testrunner.run(testfunc, timeout=1))