mesh-sdk/go/catalogue/seats_test.go

package catalogue

import (
	"testing"
)

// Defends novox/hq ADR 0110: a seat is a module assignment from a closed set.

func claimed(claims string) []byte {
	return []byte(`{"module":"thing","version":"1","provides":[{"name":"npm-package-registry","scope":"mesh","credential":{"form":"none"}}],"claims":` + claims + `}`)
}

// The holder of a seat answers among several providers.

// The working set is loaded from the store, and an empty load never erases it (novox/hq ADR 0122).
func TestUseSeatsReplacesTheSetButNeverEmptiesIt(t *testing.T) {
	before := Seats()
	defer UseSeats(DefaultSeats()) // restore for other tests, whatever this leaves it as

	// An empty load (store not seeded, or unreadable) leaves the compiled defaults in force.
	UseSeats(nil)
	if len(Seats()) != len(before) {
		t.Fatalf("an empty load changed the set from %d to %d seats", len(before), len(Seats()))
	}
	// A non-empty load replaces it — this is how a rename in the store reaches the lookups.
	UseSeats([]Seat{{Name: "node-firewall", Scope: ScopeNode, Decision: "novox/hq ADR 0122"}})
	if _, known := SeatNamed("node-firewall"); !known {
		t.Fatal("the loaded set did not replace the working set")
	}
	if len(Seats()) != 1 {
		t.Fatalf("the working set is %d seats, not the one that was loaded", len(Seats()))
	}
}