One predicate for the private network: the filter's accept set is the set the names and the resolver mean; the catalogue is read once for the three mesh-wide questions

cmd/mesh-controller/network_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/novox/mesh-controller/internal/inventory"
+	"github.com/novox/mesh-controller/internal/overlay"
 )
 
 // placementOf is what the mesh holds about where one node is.
@@ -96,7 +97,7 @@ func TestOnlyAMachineOnThePrivateNetworkIsNamed(t *testing.T) {
 		t.Fatalf("two machines on the network are not both named: %v", names)
 	}
 	// The laptop keeps its place and its address, and stops running the network.
-	if err := open.inventory.Unassign(ctx, "laptop", "mesh-wireguard"); err != nil {
+	if err := open.inventory.Unassign(ctx, "laptop", overlay.Name); err != nil {
 		t.Fatal(err)
 	}
 	names, err = namesInTheMesh(ctx, open.inventory, shelf)