ipairs_clone can be used with map (default lua ipairs can't)

Author: aggyomfg

assets/tests/iter_clone/hashmap_ipairs.lua

@@ -0,0 +1,27 @@
+local res_type = world.get_type_by_name("TestResourceWithVariousFields")
+local res = world.get_resource(res_type)
+
+local map = res.string_map
+
+local count = 0
+local found_keys = {}
+
+-- ipairs_clone on a map returns (index, [key, value]) where value is a list
+for i, entry in map:ipairs_clone() do
+    assert(i == count + 1, "Index should be sequential: expected " .. (count + 1) .. ", got " .. i)
+
+    -- entry should be a list with [key, value]
+    assert(entry ~= nil, "Entry should not be nil")
+    assert(entry[1] ~= nil, "Key should not be nil")
+    assert(entry[2] ~= nil, "Value should not be nil")
+
+    local key = entry[1]
+    local value = entry[2]
+
+    count = count + 1
+    found_keys[key] = value
+end
+
+assert(count == 2, "Expected 2 entries, got " .. count)
+assert(found_keys["foo"] == "bar", "Expected foo=>bar, got " .. tostring(found_keys["foo"]))
+assert(found_keys["zoo"] == "zed", "Expected zoo=>zed, got " .. tostring(found_keys["zoo"]))