package test

import (
	"apsClient/service"
	"encoding/binary"
	"log"
	"testing"
)

func TestWriteHoldingRegister(t *testing.T) {
	Init()
	ipPort := "127.0.0.1:502"
	address := 1001
	value := 1001
	err := service.WriteHoldingRegister(ipPort, address, value)
	if err != nil {
		log.Fatal(err)
	}
	var readValue int
	raw, err := service.ReadByModbusTCP(ipPort, address, 1)
	if err != nil {
		log.Fatal(err)
	}

	if len(raw) == 2 {
		readValue = int(binary.BigEndian.Uint16(raw))
	} else if len(raw) == 4 {
		readValue = int(binary.BigEndian.Uint32(raw))
	} else {
		log.Fatal("unknown supported raw value length")
	}

	if readValue != value {
		t.Logf("read value:%v not equal write value:%v", readValue, value)
		t.Fail()
	} else {
		t.Logf("write ok, read value:%v equal write value:%v", readValue, value)
	}
}