Integrate CMocka to do unit testing

CMakeLists.txt

@@ -97,3 +97,8 @@ target_link_libraries(assets_test
     ${GAME_LIBS}
 )
 
+if (UNIT_TESTING)
+     find_package(cmocka 1.1.0 REQUIRED)
+     add_subdirectory(tests)
+endif()
+

tests/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_executable(AABBTest test_AABB.c)
+target_compile_features(AABBTest PRIVATE c_std_99)
+target_link_libraries(AABBTest PRIVATE
+    cmocka
+    lib_scenes
+)
+
+enable_testing()
+add_test(NAME AABBTest COMMAND AABBTest)

tests/test_AABB.c

@@ -0,0 +1,25 @@
+#include "AABB.h"
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+static void test_no_overlap(void **state)
+{
+    (void) state;
+    Vector2 a = {0, 5};
+    Vector2 b = {6, 9};
+    float overlap = 0;
+    assert_int_equal(find_1D_overlap(a, b, &overlap), 0);
+}
+
+int main(void)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(test_no_overlap),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}