add CMake syntax highlighting test

tests/syntax-tests/source/CMake/CMakeLists.txt

@@ -0,0 +1,16 @@
+# This is a file for testing syntax highlighting.
+cmake_minimum_required(VERSION 3.13)
+project(hello-bat VERSION 0.0.1 LANGUAGES C)
+
+set(SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src/")
+file(GLOB_RECURSE SOURCES "${SOURCE_DIR}/*.c")
+
+add_executable(hello-bat SOURCES)
+
+find_package(assimp CONFIG)
+target_link_libraries(hello-bat assimp)
+
+option("ENABLE_TESTS" OFF)
+if(ENABLE_TESTS)
+  add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/tests/")
+endif()