test: add cmocka to perform unit-testing

Signed-off-by: Daniel Skinstad Drabitzius <[email protected]>

.gitlab-ci.yml

@@ -48,3 +48,27 @@ test:smoke-build:
       -DCONFIG_MENDER_PROVIDES_DEPENDS=ON
     - cmake --build build --parallel $(nproc --all)
     - ./build/mender-mcu-client.elf --help
+
+test:unit:
+  stage: test
+  image: debian:12-slim
+  needs: []
+  before_script:
+    - apt-get update && apt-get install -y git cmake libcurl4-openssl-dev libcjson-dev libmbedtls-dev
+  script:
+    - cmake -B build tests
+      -DCONFIG_MENDER_PLATFORM_FLASH_TYPE="posix"
+      -DCONFIG_MENDER_PLATFORM_LOG_TYPE="posix"
+      -DCONFIG_MENDER_PLATFORM_NET_TYPE="generic/curl"
+      -DCONFIG_MENDER_PLATFORM_SCHEDULER_TYPE="posix"
+      -DCONFIG_MENDER_PLATFORM_STORAGE_TYPE="posix"
+      -DCONFIG_MENDER_PLATFORM_TLS_TYPE="generic/mbedtls"
+      -DCONFIG_MENDER_CLIENT_ADD_ON_INVENTORY=ON
+      -DCONFIG_MENDER_CLIENT_ADD_ON_CONFIGURE=OFF
+      -DCONFIG_MENDER_CLIENT_CONFIGURE_STORAGE=OFF
+      -DCONFIG_MENDER_CLIENT_ADD_ON_TROUBLESHOOT=OFF
+      -DCONFIG_MENDER_FULL_PARSE_ARTIFACT=ON
+      -DCONFIG_MENDER_PROVIDES_DEPENDS=ON
+      -DBUILD_TESTS=ON
+    - cmake --build build --parallel $(nproc --all)
+    - ctest --test-dir build/tests/

CMakeLists.txt

@@ -237,6 +237,13 @@ if (CONFIG_MENDER_PLATFORM_TLS_TYPE STREQUAL "mbedtls")
   endif()
 endif()
 
+# cmocka
+if (BUILD_TESTS)
+  include(cmake/FetchCMocka.cmake)
+  enable_testing()
+  add_subdirectory(tests)
+endif(BUILD_TESTS)
+
 # Define version
 file(STRINGS "${CMAKE_CURRENT_LIST_DIR}/VERSION" MENDER_CLIENT_VERSION)
 add_definitions("-DMENDER_CLIENT_VERSION=\"${MENDER_CLIENT_VERSION}\"")

tests/cmake/FetchCMocka.cmake

@@ -0,0 +1,22 @@
+#https://github.com/OlivierLDff/cmocka-cmake-example
+include(FetchContent)
+
+# Declare our target. We want the lastest stable version, not the master.
+# Also specify GIT_SHALLOW to avoid cloning branch we don't care about
+FetchContent_Declare(
+  cmocka
+  GIT_REPOSITORY https://git.cryptomilk.org/projects/cmocka.git
+  GIT_TAG        cmocka-1.1.5
+  GIT_SHALLOW    1
+)
+
+# We want to link to cmocka-static, so we need to set this option before calling the FetchContent_MakeAvailable
+# We also don't care about example and tests
+set(WITH_STATIC_LIB ON CACHE BOOL "CMocka: Build with a static library" FORCE)
+set(WITH_CMOCKERY_SUPPORT OFF CACHE BOOL "CMocka: Install a cmockery header" FORCE)
+set(WITH_EXAMPLES OFF CACHE BOOL "CMocka: Build examples" FORCE)
+set(UNIT_TESTING OFF CACHE BOOL "CMocka: Build with unit testing" FORCE)
+set(PICKY_DEVELOPER OFF CACHE BOOL "CMocka: Build with picky developer flags" FORCE)
+
+# Download cmocka, and execute its cmakelists.txt
+FetchContent_MakeAvailable(cmocka)

tests/tests/CMakeLists.txt

@@ -0,0 +1,15 @@
+include_directories(${CMAKE_CURRENT_LIST_DIR}/../../include)
+set(MCU_LIBRARIES "mender-mcu-client;pthread;cjson;mbedtls;mbedx509;mbedcrypto")
+
+# Add tests by adding the target name to this list
+# Example:
+# list(APPEND TEST_TARGETS mender_test_target)
+
+foreach(TEST_TARGET IN LISTS TEST_TARGETS)
+    add_cmocka_test(
+        ${TEST_TARGET}
+        SOURCES ${TEST_TARGET}.c
+        LINK_LIBRARIES ${CMOCKA_LIBRARIES} ${MCU_LIBRARIES})
+
+        target_link_libraries(${TEST_TARGET} PRIVATE cmocka-static)
+endforeach()