如何使用sinon.js框架进行模拟测试回调函数内的代码?
JSFiddle:http://jsfiddle.net/ruslans/CE5e2/
var service = function () { return { getData: function (callback) { return callback([1,2,3,4,5]); } } }; var model = function (svc) { return { data: [],init: function () { var self = this; svc.getData(function (serviceData) { self.data = serviceData; // *** test this line *** }); } } };
我使用chai的mocha测试但是熟悉qUnit,因此任何这些测试都会被接受.
解决方法
callsArgWith(0,dataMock)可以解决这个问题:
http://jsfiddle.net/ruslans/3UtdF/
http://jsfiddle.net/ruslans/3UtdF/
var target,serviceStub,dataMock = [0]; module("model tests",{ setup: function () { serviceStub = new service(); sinon.stub(serviceStub); serviceStub.getData.callsArgWith(0,dataMock); target = new model(serviceStub); },teardown: function () { serviceStub.getData.restore(); } }); test("data is populated after service.getData callback",function () { target.init(); equal(target.data,dataMock); });