[testtools] Add utility method to generate fake mqtt message

testtools/testtools_test.go

@@ -9,16 +9,16 @@ func TestFakePublisher_Publish(t *testing.T) {
 	p := NewFakePublisher()
 
 	cases := []struct {
-		topic string
+		topic          string
 		topicPublished string
-		value mqttdevice.MqttValue
-		expected string
+		value          mqttdevice.MqttValue
+		expected       string
 	}{
-		{"test/topic1", "test/topic1", mqttdevice.NewMqttValue(1) , "1" },
-		{"test/topic2", "test/invalid", mqttdevice.NewMqttValue(1) , "" },
+		{"test/topic1", "test/topic1", mqttdevice.NewMqttValue(1), "1"},
+		{"test/topic2", "test/invalid", mqttdevice.NewMqttValue(1), ""},
 	}
 
-	for _, c := range cases{
+	for _, c := range cases {
 		p.Publish(c.topic, c.value)
 		val := p.PublishedEvent(c.topicPublished)
 		if v, _ := val.StringValue(); v != c.expected {