如何使用sinon.js
框架测试回调函数内的代码进行模拟?
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进行mocha测试,但熟悉qUnit,因此任何这些测试都会被接受。
答案 0 :(得分:11)
callsArgWith(0, dataMock)
可以解决问题:
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);
});