在nodejs中为持久功能活动创建单元测试用例答案

【问题标题】：Create unit test case for durable function activity in nodejs在nodejs中为持久功能活动创建单元测试用例
【发布时间】：2022-01-08 20:58:44
【问题描述】：

我正在尝试使用 nodejs 为持久功能活动创建单元测试。但是没有找到任何关于那个或任何东西的文件。我缺乏的地方是我不知道在创建测试用例时要通过什么上下文。任何帮助将不胜感激。提前谢谢！！！

module.exports   = {
    // log: jest.fn(),
    log: (function () {
      let main = <any>jest.fn((message) => message);
      let info = jest.fn((message) => message);
      main.info = info;
      let error = jest.fn((message) => message);
      main.error = error
      return main;
    })(),
    bindingData: (function () {
      let main = <any>jest.fn((message) => message);
      let info = jest.fn((message) => message);
      main.info = info;
      let error = jest.fn((message) => message);
      main.error = error;
      return main;
    })()
  };

我正在传递此上下文，但收到与 context.bindingData 相关的错误

【问题讨论】：

标签： javascript node.js azure azure-functions azure-durable-functions

【解决方案1】：

谢谢neilbmclaughlin。发布您的建议作为帮助其他社区成员的答案。

生成器函数：

module.exports = function* orchestratorFunctionGenerator(context) {
  const input = context.df.getInput();
  const apimApiName = input.apimApiName;
  const indexNames = yield context.df.callActivity('GetIndexNames', apimApiName);
  const indexerName = indexNames.idle;
  const indexerStatus = yield context.df.callActivity('GetIndexerStatus', indexerName);
  return indexerStatus;
};

基本测试：

const chai = require('chai');
const sinon = require('sinon');
const getIndexerStatusOrchestratorGenerator = require('../../GetIndexerStatusOrchestrator/generator-function');

const expect = chai.expect;

function iterateGenerator(generator) {
  let result = generator.next();
  while (!result.done) {
    result = generator.next(result.value);
  }
  return result;
}

describe('getIndexerStatusOrchestrator', () => {
  it('happy path should return \'inProgress\'', () => {
    const indexNames = { active: 'index-1', idle: 'index-2' };
    const apimApiName = 'api';
    const input = { apimApiName };
    const stubCallActivity = sinon.stub();
    stubCallActivity.withArgs('GetIndexNames', apimApiName).returns(indexNames);
    stubCallActivity.withArgs('GetIndexerStatus', indexNames.idle).returns('inProgress');

    const context = {
      df: {
        callActivity: stubCallActivity,
        getInput: sinon.fake.returns(input),
      },
    };

    const generator = getIndexerStatusOrchestratorGenerator(context);

    const result = iterateGenerator(generator);
    expect(result.value).to.equal('inProgress');
  });
  it('indexer status should be for the idle index', () => {
    const indexNames = { active: 'index-1', idle: 'index-2' };
    const apimIndexName = 'api';
    const input = { apimApiName: apimIndexName };
    const stubCallActivity = sinon.stub();
    stubCallActivity.withArgs('GetIndexNames', apimIndexName).returns(indexNames);
    stubCallActivity.withArgs('GetIndexerStatus', indexNames.idle);
    // use stub as a mock since we need both stub and mock behaviour
    // for 'callActivity' and this was the easier option
    stubCallActivity.withArgs('GetIndexerStatus').callsFake((method, indexerName) => {
      expect.fail(`Unexpected indexer name ${indexerName}`);
    });

    const context = {
      df: {
        callActivity: stubCallActivity,
        getInput: sinon.fake.returns(input),
      },
    };

    const generator = getIndexerStatusOrchestratorGenerator(context);

    iterateGenerator(generator);

    // expectations set above
  });
});

您可以参考How to implement a basic unit test in javascript for an azure durable function、generator-function.js和DeploymentOrchestrator.js

【讨论】：