为 NodeJs 控制器编写 Mocha Chai 测试用例答案

【问题标题】：Writing Mocha Chai Test cases for NodeJs Controllers为 NodeJs 控制器编写 Mocha Chai 测试用例
【发布时间】：2023-03-10 11:08:01
【问题描述】：

我是单元测试的新手。我正在尝试为 nodejs 微服务文件的 controller.js 文件编写测试用例。我无法理解我哪里出错了。对于其中 2 个属性，总是会抛出错误“TypeError: Cannot read property 'empId' of undefined”。

这是控制器代码：

const crmgDetails = db.crmgResource_details;
const employeeProposal = db.employee_Proposal;
const Op = db.Sequelize.Op;
const raDetails = db.crmgRaSheet_entity;
let results = [];
Sequelize = require('sequelize')

exports.findOne = (req, res) => {
    console.log(req.body.empId);
    crmgDetails.findAll({where: {
        resEmployeeNumber: req.body.empId
    }
    })
       .then(data => {
           res.send(data);
        })
        .catch(err => {
            res.status(500).send({
                message:
                    err.message || "Some error occurred while retrieving tutorials."
      });
    });
};

exports.findMatchingDemandsForRmg = (req,res) => {
    let proposedDemands = [];
    
    employeeProposal.findAll({
        where: {
            emp_id: req.body.empId,
            demandSbu : req.body.sbu
        }
    }).then(proposedEmployee => {
        console.log('proposedEmployee',proposedEmployee);
        if(proposedEmployee.length === 0){
            crmgDetails.findAll({
                where: {
                    resEmployeeNumber: req.body.empId,
                    demandSbu: req.body.sbu
                }
            }).then(matchingDemands => {
                
                console.log('matchingDemands  ',matchingDemands)
                proposedDemands = matchingDemands;
                
            })
        }
        else{
            console.log("crmg Employee")
            console.log(proposedEmployee)
            
            
                for(let employee of proposedEmployee){
                
                        crmgDetails.findOne({
                            where: {
                                demandUid: employee.demandUid,
                                resEmployeeNumber: req.body.empId,
                                demandSbu: req.body.sbu
                            }
                        }).then( crmgProposed=> {
                            proposedDemands.push(crmgProposed);
                        })
                
                    
                }
            
        }
        setTimeout(() => {
            console.log(proposedDemands)
        res.send(proposedDemands);
        }, 3000);
        
        
    }).catch((err)=>{
        res.status(500).send({
            message:
              err.message || "Some error occurred while retrieving tutorials."
          });
    })

}

exports.getResourceAllocationDetails = (req,res) => {
    employeeProposal.findAll({
        include: {
            model: raDetails
        },
        where: Sequelize.and(
            {activeFlag : true},
            Sequelize.or({status:"Accepted By RMG"},
            {status:"Rejected"}
        ))
    }).then(employees => {
        res.send(employees)
    })
}

这是我尝试不带脑子写的测试文件：

const CrmgRaSheetModel = require('../controllers/crmgResource_Details.controller')
describe('Check for succcessful fetech API call', () => {
  it('property getResourceAllocationDetails should be called', async () => {
    CrmgRaSheetModel.getResourceAllocationDetails((res) => {
      expect(res).to.be.an('object')
              return res.json()
          })
  });
  it('property findMatchingDemandsForRmg should be called', async () => {
    CrmgRaSheetModel.findMatchingDemandsForRmg((res) => {
      expect(res).to.be.an('object')
              return res.json()
          })
  });
  it('property findOne should be called', async () => {
    CrmgRaSheetModel.findOne((res) => {
      expect(res).to.be.an('object')
              return res.json()
          })
  })
})

【问题讨论】：

您需要设置一个模拟 API 调用。

标签： node.js unit-testing testing mocha.js chai

【解决方案1】：

从测试文件中，您仅使用 res 调用控制器方法，因此没有机会将您的输入作为您的主体发送。所以传递 req,res 并在 req 中传递你的输入值

【讨论】：