javascript - 实习生异步测试

Question

我正在尝试使用单独的模块进行异步实习测试来执行请求调用。测试完成后，我遇到返回 true 的问题，因为即使请求成功并且测试运行完成，我总是收到超时错误。测试运行后，它只是停留在最后一页并超时。 login_test.js 是测试文件，companyCreate 是存在于外部模块中的请求调用文件。如果我将测试返回调用传递给 deferred.callback()，我不太确定会发生什么。

// login_test.js
define([
'intern!object',
'pages/loginpage',
'runtime/testConfig',
'intern/dojo/node!nconf',
'helpers/companyCreate',
'locators/loginpage',
'locators/companyselectionpage'

], function(registerSuite, LoginPage, conf, nconf, Company) {

var tests = {

    name: 'Login test',

    'Test': function() {

        /* make a call to create a company
        * param1: test function to run after we get response with login details
        * param2: intern object so we can make it async
        */
        Company.createCompany(function(response, testObj) {

            testObj.timeout = 120000; //The default timeout is 30 seconds. Not enough

            var region = nconf.get("region"); //Getting command line region value
            var regionData = conf.get(region); //Fetching  config data based on region
            var loginId = regionData.LOGIN;
            var password = regionData.PASSWORD;

            var loginPage = new LoginPage(testObj.remote, regionData.DEFAULT_TIMEOUT);

            var companySelectionPage = loginPage
                .load(regionData.BASE_URL)
                .loginIn(loginId, password);
            var homePage = companySelectionPage
                .doesCurrentURLContain('/companysel')
                .isTitlePresent()
                .selectCompany(CompanySelectionLocators.data);
            return homePage
                .doesCurrentURLContain('/homepage')
                .getAccumulatedState();
        }, this);
    }
};

registerSuite(tests);
});

>

// companyCreate.js
define(function(require) {
var request = require('intern/dojo/request');

var Company = {

    createCompany: function(callbackArg, testObj) {
        // tell intern this is async
        var deferred = testObj.async(120000);

        // make post
        request.post('https://internal.com/createcompany', {
            query: {
                version: ".0.1",
                special: "true"
            },
            data: JSON.stringify({
                userName: "Test",
                password: "pass",
                userEmail: "email@hi.com"
            }),
            headers: {
                'Content-Type': "application/json"
            }
        }).then(function(response) {
            // success, tell intern async is done, return test function to run and pass it the response
            console.log(response);
            return deferred.callback(callbackArg(response, testObj));
        }, function(err) {
            console.log(err);
        }, function(evt) {
            //console.log(evt);
        });
    }
};

return Company;
});

Answer 1

deferred.callback 旨在用于包装在其他时间执行的另一个回调。它不会解析底层的 Promise，它会返回一个新函数，当调用该函数时，如果传入的回调函数没有抛出错误，则会解析 Promise。例如:

'Test': function () {
  var dfd = this.async();

  // this use of `dfd.callback`…
  fs.readFile('foo.txt', dfd.callback(function (error, data) {
    if (error) {
      throw error;
    }

    assert.strictEqual(data, 'hello, world');
  }));

  // …is equivalent to this without it:
  fs.readFile('foo.txt', function (error, data) {
    if (error) {
      dfd.reject(error);
      return;
    }

    try {
      assert.strictEqual(data, 'hello, world');
    }
    catch (error) {
      dfd.reject(error);
      return;
    }

    dfd.resolve();
  }));
}

您应该使用 deferred.resolve，它将 promise 解析为作为第一个参数传递的值。请参阅async tests documentation有关每个功能的更多详细信息。