tests: move util test to be unit tests

Move to a unit test, no need to build this for every platform we have.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

lib/os/dec.c

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include <kernel.h>
 #include <sys/util.h>
 
 u8_t u8_to_dec(char *buf, u8_t buflen, u8_t value)

tests/lib/sys/util/CMakeLists.txt

@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-cmake_minimum_required(VERSION 3.13.1)
-include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
-project(lib_sys_util_tests)
-
-FILE(GLOB app_sources src/*.c)
-target_sources(app PRIVATE ${app_sources})

tests/lib/sys/util/prj.conf

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

tests/unit/util/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
+project(util)
+set(SOURCES main.c ../../../lib/os/dec.c)
+include($ENV{ZEPHYR_BASE}/subsys/testsuite/unittest.cmake)

tests/unit/util/testcase.yaml

@@ -1,3 +1,4 @@
 tests:
   libraries.sys.util.dec:
     tags: lib_sys_util_tests
+    type: unit