package gre

import "testing"

func TestValidateGRE(t *testing.T) {
	cfg, err := New().Validate(map[string]interface{}{
		"local_endpoint":   "198.51.100.10",
		"remote_endpoint":  "203.0.113.20",
		"local_tunnel_ip":  "10.255.0.1/30",
		"remote_tunnel_ip": "10.255.0.2/30",
		"remote_subnet":    "192.168.10.0/24",
	})
	if err != nil {
		t.Fatal(err)
	}
	if cfg["ttl"] != 255 || cfg["mtu"] != 1476 {
		t.Fatalf("defaults not applied: %#v", cfg)
	}
}

func TestValidateGRERejectsDifferentTunnelNetworks(t *testing.T) {
	_, err := New().Validate(map[string]interface{}{
		"local_endpoint":   "198.51.100.10",
		"remote_endpoint":  "203.0.113.20",
		"local_tunnel_ip":  "10.255.0.1/30",
		"remote_tunnel_ip": "10.255.1.2/30",
	})
	if err == nil {
		t.Fatal("expected tunnel subnet validation error")
	}
}