feat(multiplayer): wire production proposal outbox delivery

server/api/outbox_test.go

@@ -0,0 +1,51 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/cosmic-clash/cosmic-clash/server/store"
+)
+
+func TestDeliverProposalOutboxEventPublishesEveryTarget(t *testing.T) {
+	service := &Service{}
+	first := service.getEventHub().subscribe("player-a")
+	second := service.getEventHub().subscribe("player-b")
+	defer service.getEventHub().unsubscribe(first)
+	defer service.getEventHub().unsubscribe(second)
+
+	payload, err := json.Marshal(map[string]any{
+		"event": "proposal_changed", "revision": uint64(0), "resource_id": "proposal-1",
+		"occurred_at": time.Unix(1000, 0).UTC(), "state": "OPEN", "player_ids": []string{"player-a", "player-b"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := deliverProposalOutboxEvent(context.Background(), store.OutboxEvent{EventID: "event-1", Payload: payload}, service); err != nil {
+		t.Fatalf("deliver proposal event: %v", err)
+	}
+	for name, subscriber := range map[string]*eventSubscriber{"player-a": first, "player-b": second} {
+		select {
+		case <-subscriber.queue:
+		case <-time.After(time.Second):
+			t.Fatalf("%s did not receive targeted proposal event", name)
+		}
+	}
+}
+
+func TestDeliverProposalOutboxEventRejectsMalformedOrUntargetedRows(t *testing.T) {
+	service := &Service{}
+	for name, event := range map[string]store.OutboxEvent{
+		"malformed":      {Payload: []byte("{")},
+		"wrong event":    {Payload: []byte(`{"event":"match_completed","resource_id":"match-1","player_ids":["player-a"]}`)},
+		"missing target": {Payload: []byte(`{"event":"proposal_changed","resource_id":"proposal-1","player_ids":[]}`)},
+	} {
+		t.Run(name, func(t *testing.T) {
+			if err := deliverProposalOutboxEvent(context.Background(), event, service); err == nil {
+				t.Fatal("malformed or untargeted event accepted")
+			}
+		})
+	}
+}