Merge pull request #20 from fabriziosestito/test/add-publisher-itnegr…

…ation-test

test: add messaging.Publisher integration test

internal/messaging/publisher_test.go

@@ -0,0 +1,53 @@
+package messaging
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type testMessage struct {
+	Data string `json:"data"`
+}
+
+func (m testMessage) MessageType() string {
+	return "test-type"
+}
+
+func TestPublisher_Publish(t *testing.T) {
+	ns, err := NewServer()
+	require.NoError(t, err)
+	defer ns.Shutdown()
+
+	js, err := NewJetStreamContext(ns)
+	require.NoError(t, err)
+
+	publisher := NewPublisher(js)
+
+	msg := testMessage{
+		Data: "test data",
+	}
+
+	err = publisher.Publish(msg)
+	require.NoError(t, err)
+
+	sub, err := js.SubscribeSync(SbombasticSubject)
+	require.NoError(t, err)
+	defer func() {
+		err := sub.Unsubscribe()
+		require.NoError(t, err)
+	}()
+
+	receivedMsg, err := sub.NextMsg(2 * time.Second)
+	require.NoError(t, err)
+
+	assert.Equal(t, msg.MessageType(), receivedMsg.Header.Get(MessageTypeHeader))
+
+	var receivedData testMessage
+	err = json.Unmarshal(receivedMsg.Data, &receivedData)
+	require.NoError(t, err)
+	assert.Equal(t, msg.Data, receivedData.Data)
+}