Hello,
I've been working with unit tests lately, and got the example unity project to run (from here). Now I encounter some issues when integrating it into another Zephyr application (currently the blinky example to understand the procedure). As mentioned in the guide, cmock_handle() can be called in CMakeLists.txt to mock zephyr include headers. For instance, the blinky example consists of main.c which includes <zephyr.h>, <device.h>, <devicetree.h> and <drivers/gpio.h>. From my understanding, it is possible to run unit tests on the functions inside main.c when these include headers have been mocked, i.e.,
cmock_handle(${ZEPHYR_BASE}/include/drivers/gpio.h drivers)
However, running the project with native_posix still gives undefined devicetree macros, redefinitions and unknown config variables (CONFIG_GPIO=y and necessary modules are enabled). The mocked header files are included in the test files, where the working unity test example has been used as a base. Initially, CppUTest was used, but as it seemed more work to create the mocks and stubs, Unity / CMock has been used instead. When including CONFIG_GPIO=y, building the project yields an error saying (which may come from native posix board?):
Including boilerplate (Zephyr base): /tmp/ncs/zephyr/cmake/app/boilerplate.cmake -- Application: /tmp/ncs/projects/project-name -- Zephyr version: 2.3.0-rc1 (/tmp/ncs/zephyr) -- Found Python3: /usr/bin/python3.8 (found suitable exact version "3.8.5") found components: Interpreter -- Board: native_posix -- Found west: /usr/local/bin/west (found suitable version "0.8.0", minimum required is "0.7.1") -- Found dtc: /usr/bin/dtc (found suitable version "1.4.7", minimum required is "1.4.6") -- Found toolchain: host (gcc/ld) -- Found BOARD.dts: /tmp/ncs/zephyr/boards/posix/native_posix/native_posix.dts -- Generated zephyr.dts: /tmp/ncs/projects/builds/cmock_test/zephyr/zephyr.dts -- Generated devicetree_unfixed.h: /tmp/ncs/projects/builds/cmock_test/zephyr/include/generated/devicetree_unfixed.h Parsing /tmp/ncs/projects/project-name/Kconfig Loaded configuration '/tmp/ncs/zephyr/boards/posix/native_posix/native_posix_defconfig' Merged configuration 'unit_test.conf' Configuration saved to '/tmp/ncs/projects/builds/cmock_test/zephyr/.config' Kconfig header saved to '/tmp/ncs/projects/builds/cmock_test/zephyr/include/generated/autoconf.h' -- The C compiler identification is GNU 9.3.0 -- The CXX compiler identification is GNU 9.3.0 -- The ASM compiler identification is GNU -- Found assembler: /usr/bin/gcc -- Cache files will be written to: /root/.cache/zephyr -- Generating test runner /tmp/ncs/projects/builds/cmock_test/runner/runner_example_test.c -- Generating cmock for header /tmp/ncs/zephyr/include/device.h -- Configuring done CMake Error at /tmp/ncs/zephyr/cmake/extensions.cmake:372 (add_library): No SOURCES given to target: drivers__gpio Call Stack (most recent call first): /tmp/ncs/zephyr/cmake/extensions.cmake:349 (zephyr_library_named) /tmp/ncs/zephyr/drivers/gpio/CMakeLists.txt:3 (zephyr_library) CMake Generate step failed. Build files cannot be regenerated correctly. FATAL ERROR: command exited with status 1: /usr/local/bin/cmake -B/tmp/ncs/projects/builds/cmock_test -S/tmp/ncs/projects/project-name -GNinja -DDoTests=ON
Maybe it depends on the use case? Because the blinky example calls the "device_get_binding()" function and sets a certain pin, which is highly hardware related....
Have I misinterpreted the way of doing this?
Thanks in advance,
EivindTH
