使用Jasmine测试REST api调用

Question

I am trying to test a REST api call using Jasmine. Can anyone please explain how to deal with a asynchronous test like this using Jasmine?

==============================answer.js==============================

 var conf = require('../config'); var req = require('request'); var fs = require('fs'); function base64_encode(file) { var file = fs.readFileSync(file); return new Buffer(file).toString('base64'); } var answers = function (){ this.getAnswer = function(id, branchId, locale, question, deviceId){ var answer; req({ url : conf.baseUrl + '/api/v1/answers', method : 'POST', headers: { 'content-type': 'text/plain', }, body : JSON.stringify({ id : id, branchId : branchId, locale : locale, question : base64_encode("./" + question + ".wav"), deviceId : deviceId }) }, function(error, response, body) { if (error) { console.log(error); } else { answer = JSON.parse(body).answer; console.log(JSON.parse(body).responseText); fs.writeFile("../answer.wav", answer, 'base64', function(err) { if (err) { return console.log(err); } console.log("file saved successfully!"); }); } }); return answer; } } module.exports = new answers(); 

=======================loan_application_spec.js======================

 var answers_api = require('../requests/answers'); describe("Loan application", function() { it("Ask about loans", function() { console.log(answers_api.getAnswer("1234", "HLB_02", "en-US", "input", "robot_01")); }); }); 

Answer 1

Here is how I'd modified it a bit to suit the testing.

• I changed the answers to be an object and not a function. But I still use the new keyword to instantiate for the ease of testing
• May be if you could refactor the req object's implementation, it might be easier for you to test

Here is a post that helped me construct this answer.

    var conf = require('../config');
    var req = require('request');
    var fs = require('fs');

    function base64_encode(file) {
    var file = fs.readFileSync(file);
     return new Buffer(file).toString('base64');
    }

    var answers = {
    ans: "",
    getAnswer : function(id, branchId, locale, question, deviceId){
        var answer;     
        req({
            url : conf.baseUrl + '/api/v1/answers',
            method : 'POST',
            headers: {
                'content-type': 'text/plain',
            },
            body : JSON.stringify({
                id : id,
                branchId : branchId,
                locale : locale,
                question : base64_encode("./" + question + ".wav"),
                deviceId : deviceId
            })
        }, function(error, response, body) {
            if (error) {
                console.log(error);
            } else {
                answer = JSON.parse(body).answer;
                console.log(JSON.parse(body).responseText);
                fs.writeFile("../answer.wav", answer, 'base64',
                function(err) {
                    if (err) {
                        return console.log(err);
                    }
                    console.log("file saved successfully!");
                });
            }
        });
        this.ans = answer;
        return answer;
      }
    }

    return module.exports = Object.create(answers);

    //Jasmine test

    var answers_api = require('../requests/answers');

    describe("Loan application", function() {
        it("Ask about loans", function() {
        req = jasmine.createSpy().andCallFake(function() {
            answers_api.ans = true // actually make this answer whatever you expect it to be.
        });
        var testObj = answers_api.getAnswer("1234", "HLB_02", "en-US", "input", "robot_01"));
        expect(req).toHaveBeenCalled();
        expect(answers_api.ans).toBe(true)
      });
    });