使用Jasmine

Question

我正在尝试使用Jasmine测试REST api调用。任何人都可以解释如何使用Jasmine来处理这样的异步测试吗？

============================== 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

以下是我对其进行修改以适应测试的方法。

• 我将答案更改为对象而非功能。但我还是 使用new关键字实例化以便于测试
• 可能是因为你可以重构req对象的实现，它 可能更容易测试

这是帮助我构建这个答案的post。

    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)
      });
    });