Add simple test for mempool

run_tests.sh

@@ -1 +1 @@
-ctest --rerun-failed --output-on-failure --test-dir build/tests
+ctest --output-on-failure --test-dir build/tests

tests/CMakeLists.txt

@@ -5,5 +5,13 @@ target_link_libraries(AABBTest PRIVATE
     lib_scenes
 )
 
+add_executable(MemPoolTest test_mempool.c)
+target_compile_features(MemPoolTest PRIVATE c_std_99)
+target_link_libraries(MemPoolTest PRIVATE
+    cmocka
+    lib_scenes
+)
+
 enable_testing()
 add_test(NAME AABBTest COMMAND AABBTest)
+add_test(NAME MemPoolTest COMMAND MemPoolTest)

tests/test_mempool.c

@@ -0,0 +1,41 @@
+#include "mempool.h"
+#include <stdio.h>
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+static int setup_mempool(void** state)
+{
+    init_memory_pools();
+    return 0;
+}
+
+static int teardown_mempool(void** state)
+{
+    free_memory_pools();
+    return 0;
+}
+
+static void test_simple_get_and_free(void **state)
+{
+    unsigned long idx;
+    Entity_t* ent = new_entity_from_mempool(&idx);
+
+    Entity_t* q_ent = get_entity_wtih_id(idx);
+
+    assert_memory_equal(ent, q_ent, sizeof(Entity_t));
+
+    free_entity_to_mempool(idx);
+}
+
+int main(void)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test_setup_teardown(test_simple_get_and_free, setup_mempool, teardown_mempool),
+    };
+
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}