tests: add test application for CongURE implementations with SFR

tests/gnrc_sixlowpan_frag_sfr_congure_impl/Makefile

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+include ../Makefile.tests_common
+
+USEMODULE += netdev_default
+USEMODULE += auto_init_gnrc_netif
+USEMODULE += gnrc_ipv6_router_default
+USEMODULE += gnrc_sixlowpan_frag_sfr
+USEMODULE += gnrc_udp
+USEMODULE += gnrc_rpl
+USEMODULE += auto_init_gnrc_rpl
+USEMODULE += gnrc_pktdump
+USEMODULE += gnrc_icmpv6_echo
+USEMODULE += shell
+USEMODULE += shell_cmd_gnrc_pktbuf
+USEMODULE += shell_cmd_gnrc_udp
+USEMODULE += ps
+USEMODULE += netstats_l2
+USEMODULE += netstats_ipv6
+USEMODULE += netstats_rpl
+
+CONGURE_IMPL ?= congure_sfr
+
+ifeq (congure_sfr,$(CONGURE_IMPL))
+  USEMODULE += gnrc_sixlowpan_frag_sfr_congure_sfr
+else
+  $(error "Unknown CongURE implementation `$(CONGURE_IMPL)`")
+endif
+
+include $(RIOTBASE)/Makefile.include
+
+# Set a custom channel if needed
+include $(RIOTMAKE)/default-radio-settings.inc.mk

tests/gnrc_sixlowpan_frag_sfr_congure_impl/Makefile.ci

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+BOARD_INSUFFICIENT_MEMORY := \
+    airfy-beacon \
+    arduino-duemilanove \
+    arduino-leonardo \
+    arduino-mega2560 \
+    arduino-nano \
+    arduino-uno \
+    atmega1284p \
+    atmega328p \
+    atmega328p-xplained-mini \
+    atxmega-a3bu-xplained \
+    b-l072z-lrwan1 \
+    blackpill-128kib \
+    bluepill-128kib \
+    bluepill-stm32f030c8 \
+    calliope-mini \
+    derfmega128 \
+    hifive1 \
+    hifive1b \
+    i-nucleo-lrwan1 \
+    im880b \
+    lsn50 \
+    mega-xplained \
+    microbit \
+    microduino-corerf \
+    msb-430 \
+    msb-430h \
+    nrf51dongle \
+    nrf6310 \
+    nucleo-f030r8 \
+    nucleo-f031k6 \
+    nucleo-f042k6 \
+    nucleo-f070rb \
+    nucleo-f072rb \
+    nucleo-f303k8 \
+    nucleo-f334r8 \
+    nucleo-l011k4 \
+    nucleo-l031k6 \
+    nucleo-l053r8 \
+    samd10-xmini \
+    saml10-xpro \
+    saml11-xpro \
+    slstk3400a \
+    stk3200 \
+    stm32f030f4-demo \
+    stm32f0discovery \
+    stm32g0316-disco \
+    stm32l0538-disco \
+    telosb \
+    waspmote-pro \
+    yunjia-nrf51822 \
+    z1 \
+    zigduino \
+    #

tests/gnrc_sixlowpan_frag_sfr_congure_impl/README.md

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+SFR CongURE implementation test
+===============================
+This test is largely based on the [`gnrc_networking`][1] example but is changed
+so SFR with different CongURE implementations can be tested. When `CONGURE_IMPL`
+is not set in the environment, `gnrc_sixlowpan_frag_sfr_congure_sfr` is used,
+other implementations can be used with `congure_<impl>`.
+
+[1]: https://github.com/RIOT-OS/RIOT/tree/master/examples/gnrc_networking

tests/gnrc_sixlowpan_frag_sfr_congure_impl/main.c

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+/*
+ * Copyright (C) 2015-21 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.
+ */
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ * @author      Martine Lenders <m.lenders@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "fmt.h"
+#include "shell.h"
+#include "msg.h"
+
+#define MAIN_QUEUE_SIZE     (8)
+static msg_t _main_msg_queue[MAIN_QUEUE_SIZE];
+
+int main(void)
+{
+    msg_init_queue(_main_msg_queue, MAIN_QUEUE_SIZE);
+
+    char line_buf[SHELL_DEFAULT_BUFSIZE];
+    shell_run(NULL, line_buf, SHELL_DEFAULT_BUFSIZE);
+
+    /* should be never reached */
+    return 0;
+}

tests/gnrc_sixlowpan_frag_sfr_congure_impl/tests-with-config/01-run.py

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+#!/usr/bin/env python3
+
+# Copyright (C) 2021 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.
+
+
+import sys
+from testrunner import run
+
+
+def testfunc(child):
+    child.sendline('udp send fe80::1 1337 abcde')
+    child.expect_exact('Success: sent 5 byte(s) to [fe80::1]:1337')
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))