package chain

import "testing"

func TestChain(t *testing.T) {
	// 创建患者实例
	patient := &Patient{name: "张三"}

	// 创建看病处理者链
	hospital := &HospitalChainHandler{}

	// 设置病人看病的链路
	processes := []PatientHandler{
		&Reception{},
		&Clinic{},
		&Cashier{},
		&Pharmacy{},
	}
	var current PatientHandler = hospital
	for _, process := range processes {
		current = current.SetNext(process)
	}

	// 执行处理链
	if err := hospital.Execute(patient); err != nil {
		t.Errorf("处理患者失败: %v", err)
	}

	// 检查最终状态
	if patient.status != PatientStatusPharmacy {
		t.Errorf("患者状态不正确，期望 %d，实际 %d", PatientStatusPharmacy, patient.status)
	}
}