package world

import (
	"testing"

	"gopkg.in/yaml.v3"
)

// Regression: a reference-style room object entry (id only) that also carries
// behavior fields silently lost them at runtime, because the loader always
// uses the object file. It must now be rejected at load time.
func TestRoomObjectReferenceRejectsBehaviorFields(t *testing.T) {
	src := "id: 1\nname: Test\nobjects:\n  - id: chest\n    on_use:\n      - steps:\n          - message: hi\n"
	var r Room
	if err := yaml.Unmarshal([]byte(src), &r); err == nil {
		t.Fatal("reference object entry with on_use was accepted; the behavior would be silently lost")
	}
}