Improve testing framework

Replaced Criterrion with CMock. Added few tests, currently not working
properly. Random test upgrades.

graphics/CMakeLists.txt

@@ -7,6 +7,8 @@ find_package(FreeType REQUIRED)
 find_package(Vulkan COMPONENTS glslc)
 find_program(glslc_executable NAMES glslc HINTS ${Vulkan_GLSLC_EXECUTABLE}/..)
 
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror")
+
 file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/shaders)
 
 cmake_policy(SET CMP0116 NEW)
@@ -35,7 +37,11 @@ shaders/solid_objects.frag
 shaders/on_screen_text.frag
 )
 
-add_library(rse_graphics SHARED shaders/shader.vert.num shaders/shader.frag.num)
+add_library(rse_graphics SHARED
+    shaders/shader.vert.num
+    shaders/solid_objects.frag.num
+    shaders/on_screen_text.frag.num
+    )
 target_include_directories(rse_graphics PRIVATE
 ${PROJECT_SOURCE_DIR}
 ${CMAKE_CURRENT_SOURCE_DIR}