[nrf fromtree] tests: net: mqtt: Add MQTT 5.0 packet encoder/decoder tests

Add new test suite covering MQTT 5.0 packet format.

Signed-off-by: Robert Lubos <[email protected]>
(cherry picked from commit 347653e)

Author: rlubos

tests/net/lib/mqtt/v5_0/mqtt_packet/CMakeLists.txt

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(mqtt_5_packet)
+
+target_include_directories(app PRIVATE
+  ${ZEPHYR_BASE}/subsys/net/lib/mqtt
+)
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/net/lib/mqtt/v5_0/mqtt_packet/prj.conf

@@ -0,0 +1,7 @@
+CONFIG_ZTEST=y
+CONFIG_NET_TEST=y
+CONFIG_NETWORKING=y
+CONFIG_ENTROPY_GENERATOR=y
+CONFIG_TEST_RANDOM_GENERATOR=y
+CONFIG_MQTT_LIB=y
+CONFIG_MQTT_VERSION_5_0=y