package comm

import (
	"reflect"
	"testing"
)

// 扣费明细存进会议记录 computedevices 列（code:n,code:n），转写失败时按它原路退回。
// code 可能是带冒号的 MAC，必须按最后一个冒号切。
func TestDeviceChargesRoundTrip(t *testing.T) {
	in := []DeviceCharge{
		{Code: "F0:A9:12:34:56:78", N: 30},
		{Code: "B0220000000000AB", N: 5},
	}
	s := EncodeDeviceCharges(in)
	if s != "F0:A9:12:34:56:78:30,B0220000000000AB:5" {
		t.Fatalf("编码结果 = %q", s)
	}
	if got := DecodeDeviceCharges(s); !reflect.DeepEqual(got, in) {
		t.Fatalf("解码结果 = %+v, want %+v", got, in)
	}
	// 空码、非正数不进明细；脏数据解析时跳过，不能退出负数
	if got := EncodeDeviceCharges([]DeviceCharge{{Code: "", N: 3}, {Code: "X", N: 0}}); got != "" {
		t.Fatalf("空明细应编码为空串，实际 %q", got)
	}
	if got := DecodeDeviceCharges("abc,:5,X:-3,Y:notnum,Z:7"); !reflect.DeepEqual(got, []DeviceCharge{{Code: "Z", N: 7}}) {
		t.Fatalf("脏数据解析 = %+v", got)
	}
	if got := DecodeDeviceCharges(""); len(got) != 0 {
		t.Fatalf("空串应解析为空，实际 %+v", got)
	}
}