package contracts

import (
	"encoding/json"
	"os"
	"testing"
)

func TestCurrentMQTopologyRequiresOnlyBusinessExchanges(t *testing.T) {
	body, err := os.ReadFile("schema/mq-topology.json")
	if err != nil {
		t.Fatal(err)
	}
	var topology map[string]json.RawMessage
	if err := json.Unmarshal(body, &topology); err != nil {
		t.Fatal(err)
	}
	if _, exists := topology["dead_letter_exchange"]; exists {
		t.Fatal("unused dead-letter exchange must not be required by the current topology")
	}
}