bluetooth: mesh: add unit tests for new sensor API

This tests the new APIs in sensor.h/sensor_types.h:

  * For each sensor format, test `bt_mesh_sensor_value_to_micro`,
    `bt_mesh_sensor_value_to_float`, `bt_mesh_sensor_value_from_micro`
    and `bt_mesh_sensor_value_from_float` according to GSS. Tests min
    value, max value, values out of range, prohibited values and
    special values.
  * For each sensor type defined in `sensor_types.c`, test that:
      * Property ID lookup returns the correct sensor type.
      * During decoding, the raw data is partitioned correctly into
        `bt_mesh_sensor_value`s according to channel widths, and the
        correct format is pointed to in each value.
      * During encoding, the raw data is correctly added to the buffer
        according to channel widths.

Signed-off-by: Ludvig Jordet <[email protected]>

tests/subsys/bluetooth/mesh/sensor_subsys_new/CMakeLists.txt

@@ -0,0 +1,34 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(bt_mesh_sensor_subsystem_new_test)
+
+target_include_directories(app PUBLIC
+  ${ZEPHYR_NRF_MODULE_DIR}/subsys/bluetooth/mesh
+  )
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE
+  ${app_sources}
+  ${ZEPHYR_NRF_MODULE_DIR}/subsys/bluetooth/mesh/sensor_types.c
+  ${ZEPHYR_NRF_MODULE_DIR}/subsys/bluetooth/mesh/sensor.c
+  )
+
+target_compile_options(app
+  PRIVATE
+  -DCONFIG_BT_MESH_MODEL_KEY_COUNT=5
+  -DCONFIG_BT_MESH_MODEL_GROUP_COUNT=5
+  -DCONFIG_BT_MESH_SENSOR_ALL_TYPES=1
+  -DCONFIG_BT_MESH_SENSOR_LABELS=1
+  -DCONFIG_BT_MESH_SENSOR_CHANNELS_MAX=5
+  -DCONFIG_BT_MESH_SENSOR_CHANNEL_ENCODED_SIZE_MAX=4
+  -DCONFIG_BT_LOG_LEVEL=0
+  -DCONFIG_BT_MESH_USES_TINYCRYPT
+  )
+
+zephyr_linker_sources(SECTIONS sensor_types.ld)

tests/subsys/bluetooth/mesh/sensor_subsys_new/prj.conf

@@ -0,0 +1,10 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Ztest configuration
+CONFIG_ZTEST=y
+CONFIG_CBPRINTF_FP_SUPPORT=y
+CONFIG_NET_BUF=y

tests/subsys/bluetooth/mesh/sensor_subsys_new/sensor_types.ld

@@ -0,0 +1,6 @@
+SECTION_DATA_PROLOGUE(bt_mesh_sensor_types_sections,,SUBALIGN(4))
+{
+	_bt_mesh_sensor_type_list_start = .;
+	KEEP(*(SORT_BY_NAME("._bt_mesh_sensor_type.static.*")));
+	_bt_mesh_sensor_type_list_end = .;
+} GROUP_LINK_IN(ROMABLE_REGION)