Added test for minimal example. Omit optional values when not set. Added messages for route info, production drop and route end.

production_drop.go

@@ -0,0 +1,46 @@
+package feragstring
+
+import "fmt"
+
+type ProductionDrop struct {
+	FeragMessage
+	agentName string
+	numberOfCopies int
+}
+
+func (pd *ProductionDrop) NumberOfCopies() string {
+	return fmt.Sprintf("+13%05d", pd.numberOfCopies)
+}
+
+func (pd *ProductionDrop) SetNumberOfCopies(numberOfCopies int) {
+	pd.numberOfCopies = numberOfCopies
+}
+
+func (pd *ProductionDrop) AgentName() string {
+	return fmt.Sprintf("+12%-10s", pd.agentName)
+}
+
+func (pd *ProductionDrop) SetAgentName(agentName string) {
+	pd.agentName = agentName
+}
+
+func NewProductionDrop() *ProductionDrop {
+	pd := ProductionDrop{
+		FeragMessage: FeragMessage{
+			messageStart: "2403",
+			messageEnd:   "!",
+		},
+	}
+	return &pd
+}
+
+func (pd *ProductionDrop) Payload() string {
+	data := pd.AgentName()
+	data += pd.NumberOfCopies()
+	return data
+}
+
+func (pd *ProductionDrop) Message() string {
+	message := pd.FeragMessage.MessageTemplate()
+	return message(&pd.FeragMessage, pd.Payload())
+}