Implement notifications service with shared messaging and email drivers (#36)

backend/shared/messaging/internal/natscap/subscription_test.go

@@ -0,0 +1,58 @@
+package natscap
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"git.sendico.io/tech/sxchnge/shared/messaging/capability"
+	"git.sendico.io/tech/sxchnge/shared/messaging/reliable"
+	"github.com/nats-io/nats.go"
+)
+
+func TestFetchPollDeadlineIsBounded(t *testing.T) {
+	parent, cancel := context.WithTimeout(context.Background(), time.Hour)
+	defer cancel()
+	ctx, stop, derived := fetchPollContext(parent, time.Second)
+	if stop != nil {
+		defer stop()
+	}
+	deadline, ok := ctx.Deadline()
+	if !ok || !derived || time.Until(deadline) > time.Second {
+		t.Fatal("fetch escaped poll deadline")
+	}
+}
+func TestClosedSubscriptionAndAck(t *testing.T) {
+	s := &natsSubscription{}
+	if err := s.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := s.Fetch(context.Background(), 1, time.Second); !errors.Is(err, capability.ErrClosed) {
+		t.Fatal(err)
+	}
+	d := &natsDelivery{sub: s}
+	if err := d.Ack(context.Background()); !errors.Is(err, capability.ErrClosed) {
+		t.Fatal(err)
+	}
+	d.acked = true
+	if err := d.Ack(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+}
+func TestConsumerDriftRejected(t *testing.T) {
+	want := nats.ConsumerConfig{Durable: "email", FilterSubject: "notifications.email", AckPolicy: nats.AckExplicitPolicy, DeliverPolicy: nats.DeliverAllPolicy, AckWait: time.Minute}
+	current := want
+	current.FilterSubject = "other"
+	if err := validateConsumerConfig(current, want, true); err == nil {
+		t.Fatal("subject drift accepted")
+	}
+	current = want
+	current.AckWait = time.Second
+	if err := validateConsumerConfig(current, want, true); err == nil {
+		t.Fatal("ack drift accepted")
+	}
+	if _, err := natsDeliverPolicy(reliable.DurableDeliverPolicy("invalid")); err == nil {
+		t.Fatal("invalid deliver policy accepted")
+	}
+}