使用Mocha,Chai和Sinon的NodeJS单元测试失败,之前的测试结果未恢复

时间:2018-04-04 23:01:48

标签: node.js unit-testing mocha sinon chai

在分配给我的一个相当新的项目中,已经编写了一些代码和测试用例,一些现有的测试用例突然开始意外失败,并且存根没有正确恢复。

测试套件的beforeEach和afterEach挂钩如下:

var getTokenStub, paramDescStub, getDataStub, getCaseDesiredAction;

beforeEach(function () {
    getCaseDesiredAction = sinon.stub(pgUtils, 'getCaseDesiredAction');
    getDataStub = sinon.stub(apiCall, 'getData');
    getTokenStub = sinon.stub(apiCall, 'getToken');
    paramDescStub = sinon.stub(paramDesc, 'getParameterDescriptionForCode')
});

afterEach(function () {
    pgUtils.getCaseDesiredAction.restore();
    apiCall.getData.restore();
    apiCall.getToken.restore();
    paramDesc.getParameterDescriptionForCode.restore();
});
....

接下来是一些检查错误的测试用例。

这应该通过错误回复

 ....
 it('should respond with error if query fails', (function (done) {
    var req = {
        query: {caseId: '12345'},
    };
    getTokenStub.yields(200, '"Token"');
    getDataStub.yields(200, sampleDetailsResponse);
    getCaseDesiredAction.yields('error', null);
    getCaseDetails(req, res);
    res.response.errorCode.should.equal(1234);
    res.response.msg.should.equal('caseDetailsResult Failed while getting desired action: error');
    done();
}));
....

问题在于,即使是下一个测试用例也会出现与之前测试用例相同的错误。例如: - 即使所有输入都正确,下一个案例也会因错误'caseDetailsResult Failed while getting desired action: error'而失败。如果我注释掉检查错误输入/状态的测试用例,则下一个案例正常工作。

这应该通过成功响应(但它失败并出现与之前测试案例相同的错误)

 it('should respond with case details', (function (done) {
    var req = {
        query: {caseId: '12345'},
        session: {
            "authenticatedUser": {userId: "999999999"}
        }
    };
    getTokenStub.yields(200, '"Token"');
    getCaseDesiredAction.yields(null, [{desiredaction: 'Close'}]);
    paramDescStub.yields('TEST CODE');
    getDataStub.yields(200, sampleDetailsResponse);
    getCaseDetails(req, res);
    res.response.should.eql({
        caseDetails:
            {
             ....  
            }
        success: 'true'
    });
    done();
}));

我在海上试图找到这里出了什么问题。还有其他文件遵循相同的格式,但它们没有失败。有人可以帮我解决这个问题吗?

注意:这里要注意的一件事是,最近我们在原始文件中添加了一个async.map函数。

更新:以下是规范的完整代码段

describe('getCaseDetails', function () {
  var res = {
      response: {},
      send: function (values) {
        this.response = values;
      }
  };

  var getCaseDesiredAction;
  var getDataStub;
  var getTokenStub, paramDescStub;

  beforeEach(function () {
      getCaseDesiredAction = sinon.stub(pgUtils, 'getCaseDesiredAction');
      getDataStub = sinon.stub(apiCall, 'getData');
      getTokenStub = sinon.stub(apiCall, 'getToken');
      paramDescStub = sinon.stub(paramDesc, 'getParameterDescriptionForCode')
  });

  afterEach(function () {
      pgUtils.getCaseDesiredAction.restore();
      apiCall.getData.restore();
      apiCall.getToken.restore();
      paramDesc.getParameterDescriptionForCode.restore();
  });

  // passes with error response invalid input
  it('should return an error if an input is missing', function (done) {
      var req = {
          query: {},
          session: {}
      };
      getCaseDetails(req, res);
      res.response.msg.should.equal("Invalid input");
      done();
  });

  ....

  ....
  // passes with error response 'Failed while getting desired action'
  it('should respond with error if query fails', (function (done) {
      var req = {
          query: {caseId: '12345'},
      };
      getTokenStub.yields(200, '"Token"');
      getDataStub.yields(200, sampleDetailsResponse);
      getCaseDesiredAction.yields('error', null);
      getCaseDetails(req, res);
      res.response.errorCode.should.equal(1234);
      res.response.msg.should.equal('caseDetailsResult Failed while getting desired action: error');
      done();
  }));

  ....
  ....

  it('should respond with case details', (function (done) {
      var req = {
          query: {caseId: '12345'},
          session: {
              "authenticatedUser": {userId: "999999999"}
          }
      };
      getTokenStub.yields(200, '"Token"');
      getCaseDesiredAction.yields(null, [{desiredaction: 'Close'}]);
      paramDescStub.yields('TEST CODE');
      getDataStub.yields(200, sampleDetailsResponse);
      getCaseDetails(req, res);
      res.response.should.eql({
          caseDetails:
              {
               ....  
              }
          success: 'true'
      });
      done();
  }));
});

1 个答案:

答案 0 :(得分:0)

您的res对象正在从一个测试进入另一个测试状态。您应该在beforeEach中而不是直接在describe块中初始化它。