Publish a module's stream events on its stream's subject and bind the stream consumers its membership names, so ADR 0363's own streams work in the runtime (hq issue 725)

node-tools/internal/meshtest/meshtest.go

@@ -271,3 +271,49 @@ func (m *Mesh) Consumers(t *testing.T, stream string) int {
 	}
 	return info.State.Consumers
 }
+
+// ModuleStream makes a module's own stream afresh as the controller does from the catalogue (novox/hq ADR
+// 0363 §1): named in capitals, taking `mesh.stream.<module>.event.>`, a subject space EVENTS does not take.
+func (m *Mesh) ModuleStream(t *testing.T, module, name string) {
+	t.Helper()
+	_ = m.js.DeleteStream(name)
+	if _, err := m.js.AddStream(&nats.StreamConfig{Name: name, Subjects: []string{"mesh.stream." + module + ".event.>"},
+		Retention: nats.LimitsPolicy, Discard: nats.DiscardOld}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// ConsumerOn makes a module's durable consumer on a machine on any stream, as Consumer does on EVENTS.
+func (m *Mesh) ConsumerOn(t *testing.T, stream, node, module string, filters []string, ackWait time.Duration) {
+	t.Helper()
+	cfg := &nats.ConsumerConfig{Durable: node + "_" + module, AckPolicy: nats.AckExplicitPolicy,
+		AckWait: ackWait, MaxDeliver: 10, DeliverPolicy: nats.DeliverNewPolicy}
+	if len(filters) == 1 {
+		cfg.FilterSubject = filters[0]
+	} else {
+		cfg.FilterSubjects = filters
+	}
+	if _, err := m.js.AddConsumer(stream, cfg); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// PendingOn is what a module's consumer on a stream still holds, as Pending is on EVENTS.
+func (m *Mesh) PendingOn(t *testing.T, stream, node, module string) (ackPending, notDelivered uint64) {
+	t.Helper()
+	info, err := m.js.ConsumerInfo(stream, node+"_"+module)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return uint64(info.NumAckPending), info.NumPending
+}
+
+// Messages is how many messages a stream holds.
+func (m *Mesh) Messages(t *testing.T, stream string) uint64 {
+	t.Helper()
+	info, err := m.js.StreamInfo(stream)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return info.State.Msgs
+}