mesh-sdk/go/catalogue/node_resolver_test.go

package catalogue

import (
	"strings"
	"testing"
)

// Defends novox/hq ADR 0247: a machine's own resolver is a node seat, held only where something requires
// `split-dns`; where it is held it writes the resolver file and the uplink's holder steps back from it.

// The seat: node-scoped, decided by ADR 0247, and its three verbs required of every holder — a holder
// exists only once the module serving them does, so nothing has to be optional while it catches up.
func TestTheMachinesOwnResolverIsANodeSeatWithItsVerbs(t *testing.T) {
	s, ok := SeatNamed(ResolverSeat)
	if !ok {
		t.Fatalf("%s is not in the mesh's set", ResolverSeat)
	}
	if s.Scope != ScopeNode || s.Decision != "novox/hq ADR 0247" || s.Delivers != "" || s.Replicated {
		t.Errorf("%s is %+v; a node seat under ADR 0247 that delivers nothing", ResolverSeat, s)
	}
	var got []string
	for _, v := range s.Serves {
		got = append(got, v.Name)
		if v.Optional {
			t.Errorf("%s.%s is optional; its first holder serves it", ResolverSeat, v.Name)
		}
		if v.Description == "" || v.Input["type"] != "object" || len(v.Replaces) == 0 {
			t.Errorf("%s.%s has no description, no object schema or says it replaces nothing", ResolverSeat, v.Name)
		}
	}
	if strings.Join(got, " ") != "routes route unroute" {
		t.Errorf("%s serves %v, not routes, route and unroute", ResolverSeat, got)
	}
	// The verbs name a link, domains and servers, and never a VPN: the resolver knows nothing of one.
	for _, v := range s.Serves {
		if strings.Contains(strings.ToLower(v.Description), "forti") {
			t.Errorf("%s.%s names a VPN client: %s", ResolverSeat, v.Name, v.Description)
		}
	}
}