Give a work-queue stream its one consumer, drop-only dead letters (issue 1178)

internal/inventory/streams_test.go

@@ -65,3 +65,25 @@ func TestANonWorkQueueStreamIsCarriedAsNotAWorkQueue(t *testing.T) {
 		t.Fatalf("the plain stream: %+v", got)
 	}
 }
+
+// 1178/AC1: the process a work-queue stream's bus.queues names is read from the manifest, by its resource
+// id, with the stream's own max-deliveries — what the broker composes the one durable consumer from.
+func TestTheQueueOwnersOfAWorkQueueStreamAreReadFromItsProcess(t *testing.T) {
+	sender := catalogue.Manifest{Module: "mesh-mail", Emits: []string{"mail.send.sent", "mail.send.failed"},
+		Streams: []catalogue.StreamDeclaration{{Name: "mail-sends", Events: []string{"mail.send.approved"},
+			Retention: catalogue.StreamRetentionWorkQueue, MaxDeliveries: 5}},
+		Resources: []map[string]any{
+			{"id": "account", "type": "user", "name": "mesh-mail-send"},
+			{"id": "send", "type": "process", "run": []any{"./mesh-mail", "send"}, "user": "mesh-mail-send",
+				"bus": map[string]any{"emits": []any{"mail.send.sent", "mail.send.failed"},
+					"queues": []any{"mail-sends"}}},
+		}}
+	got := queueOwnersOf(sender)
+	if len(got) != 1 || got[0].Process != "send" || got[0].Stream != "MAIL_SENDS" || got[0].MaxDeliver != 5 {
+		t.Fatalf("the sender's queue owners: %+v", got)
+	}
+	// And a module with no process declaring bus has none.
+	if got := queueOwnersOf(catalogue.Manifest{Module: "feed"}); got != nil {
+		t.Fatalf("a module with no process bus has queue owners: %+v", got)
+	}
+}