improve dict test

runtime/src/lib.rs

@@ -661,9 +661,9 @@ mod tests {
     use starknet_types_core::felt::Felt;
 
     use crate::{
-        cairo_native__dict_drop, cairo_native__dict_get, cairo_native__dict_new,
-        cairo_native__libfunc__debug__print, cairo_native__libfunc__hades_permutation,
-        cairo_native__libfunc__pedersen,
+        cairo_native__dict_drop, cairo_native__dict_dup, cairo_native__dict_get,
+        cairo_native__dict_new, cairo_native__libfunc__debug__print,
+        cairo_native__libfunc__hades_permutation, cairo_native__libfunc__pedersen,
     };
 
     pub fn felt252_short_str(value: &str) -> Felt {
@@ -751,6 +751,13 @@ mod tests {
         drop(b);
     }
 
+    pub extern "C" fn dup_fn_test(ptr: *mut c_void) -> *mut c_void {
+        assert!(!ptr.is_null());
+        let ptr: *mut u64 = ptr.cast();
+        let dup = unsafe { Box::into_raw(Box::new(*ptr)) };
+        dup.cast()
+    }
+
     #[test]
     fn test_dict() {
         let dict = unsafe { cairo_native__dict_new(free_fn_test) };
@@ -769,6 +776,18 @@ mod tests {
             assert_eq!(unsafe { **ptr }, 2);
         }
 
+        let cloned_dict = unsafe { cairo_native__dict_dup(dict, dup_fn_test) };
+
         unsafe { cairo_native__dict_drop(dict, None) };
+
+        {
+            let ptr: *mut *mut u64 =
+                unsafe { cairo_native__dict_get(&mut *cloned_dict, &key) }.cast();
+            assert!(!ptr.is_null());
+            assert!(!unsafe { *ptr }.is_null());
+            assert_eq!(unsafe { **ptr }, 2);
+        }
+
+        unsafe { cairo_native__dict_drop(cloned_dict, None) };
     }
 }