CMake: Refactor MBED_TEST_MODE test application

Author: harrisonmutai-arm

tools/cmake/tests/mbed_test_mode/CMakeLists.txt

@@ -8,6 +8,7 @@ set(MBED_CONFIG_PATH ${CMAKE_CURRENT_BINARY_DIR} CACHE STATIC "")
 
 include(${MBED_PATH}/tools/cmake/app.cmake)
 
+add_test(NAME mbed-test-mode-check COMMAND mbed-test-mode-check)
 add_executable(mbed-test-mode-check)
 project(mbed-test-mode-check)
 

tools/cmake/tests/mbed_test_mode/main.cpp

@@ -8,6 +8,6 @@
 #error "MBED_TEST_MODE not defined with BUILD_TESTING on"
 #else
 int main(){
-    return 1;
+    return 0;
 }
 #endif