kra-oa/pkg/mq/mqtt_test.go

58 lines
1.7 KiB
Go

package mq
import (
"context"
"errors"
"testing"
)
type captureClient struct{ payload []byte }
func (c *captureClient) Publish(_ context.Context, _ string, payload []byte, _ byte, _ bool) error {
c.payload = append([]byte(nil), payload...)
return nil
}
func (*captureClient) Subscribe(context.Context, string, byte, Handler) error { return nil }
func (*captureClient) Unsubscribe(context.Context, ...string) error { return nil }
func (*captureClient) Connected() bool { return true }
func (*captureClient) Close() error { return nil }
func TestDisabledMQTTIsSafeAndUnavailable(t *testing.T) {
client, err := NewMQTT(Config{})
if err != nil {
t.Fatal(err)
}
if client.Connected() {
t.Fatal("disabled client reported connected")
}
if err = client.Publish(context.Background(), "events/test", []byte("test"), AtLeastOnce, false); !errors.Is(err, ErrUnavailable) {
t.Fatalf("publish error = %v", err)
}
if err = client.Close(); err != nil {
t.Fatal(err)
}
if err = client.Close(); err != nil {
t.Fatalf("second close: %v", err)
}
}
func TestEnabledMQTTRequiresBroker(t *testing.T) {
if _, err := NewMQTT(Config{Enabled: true}); err == nil {
t.Fatal("enabled MQTT without a broker should fail")
}
}
func TestPublishAndDecodeJSON(t *testing.T) {
client := &captureClient{}
if err := PublishJSON(context.Background(), client, "orders/paid", map[string]int{"id": 7}, AtLeastOnce, false); err != nil {
t.Fatal(err)
}
var value map[string]int
if err := (Message{Payload: client.payload}).DecodeJSON(&value); err != nil {
t.Fatal(err)
}
if value["id"] != 7 {
t.Fatalf("decoded value = %#v", value)
}
}