test(mem) add test for #3324

tests/src/test_cases/test_mem.c

@@ -0,0 +1,25 @@
+#if LV_BUILD_TEST
+#include "../lvgl.h"
+
+#include "unity/unity.h"
+
+void setUp(void)
+{
+    /* Function run before every test */
+}
+
+void tearDown(void)
+{
+    /* Function run after every test */
+}
+
+/* #3324 */
+void test_mem_buf_realloc(void)
+{
+#if LV_MEM_CUSTOM == 0
+    void * buf = lv_mem_buf_get(LV_MEM_SIZE + 16384);
+    TEST_ASSERT_NULL(buf);
+#endif
+}
+
+#endif