Feature/zephyr ztest (#118)

* Leverage (older) embedded unit tests into external unit tests build upon copy of Zephyr's ztest library and CMake.

* Expand top-level CMake build to run external unit tests.

* Expand Zephyr module extension to run external unit tests via west or sanitycheck.

Co-authored-by: Gregory Shue <gregory.shue@legrand.us>

zephyr/tests/bacnet/basic/object/command/CMakeLists.txt

@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: MIT
+
+cmake_minimum_required(VERSION 3.13.1)
+
+# Extract module path and names
+string(REGEX REPLACE 
+    "/zephyr/tests[a-zA-Z_/-]*$" ""
+    BACNET_BASE
+    ${CMAKE_CURRENT_SOURCE_DIR})
+get_filename_component(BACNET_FILE_BASENAME
+    ${BACNET_BASE}
+    NAME)
+string(REGEX REPLACE 
+    "^[a-zA-Z_/-]*/zephyr/tests/" ""
+    BACNET_FILE_SUBPATH
+    ${CMAKE_CURRENT_SOURCE_DIR})
+
+
+# Add this module to the Zephyr build line
+list(APPEND ZEPHYR_EXTRA_MODULES
+    ${BACNET_BASE}
+  )
+
+
+# Update include path for this module
+list(APPEND BACNET_INCLUDE ${BACNET_BASE}/src)
+
+
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(${BACNET_FILE_BASENAME})
+
+target_include_directories(app PRIVATE ${BACNET_INCLUDE})
+target_sources(app PRIVATE
+  ${BACNET_BASE}/test/${BACNET_FILE_SUBPATH}/src/main.c)

zephyr/tests/bacnet/basic/object/command/prj.conf

@@ -0,0 +1,2 @@
+CONFIG_ZTEST=y
+CONFIG_BACNETSTACK=y

zephyr/tests/bacnet/basic/object/command/testcase.yaml

@@ -0,0 +1,3 @@
+tests:
+  bacnet.basic.object.command:
+    tags: bacnet