我正在使用 sinon 来 stub 一个对象的实例,该实例在一个带有回调的函数中,我该如何测试它?。 我不知道如何测试这个,这会给我一个错误。
这是将 js 与 sinon 和 mocha 一起使用。
函数是:
import tracker from 'pivotaltracker';
export async function getPivotalProjects(token) {
const clientTracker = new tracker.Client(token);
const userProjects = () => new Promise((resolve, reject) => {
clientTracker.projects.all((error, projects) => (projects ? resolve(projects) : reject(error)));
});
return userProjects();
测试是:
import tracker from 'pivotaltracker';
let spyTracker;
beforeEach(() => {
spyTracker = sinon.stub(tracker, 'Client');
});
it('should do the request to get the activities from projects.', async () => {
spyTracker.callsArgWith(1, null, [true, 'token']);
// spyTracker.projects.all.returns('token');
await PivotalTrackerApi.getPivotalProjects('token');
sinon.assert.threw(spyTracker);
spyTracker.restore();
});
这有什么问题吗?如果有人能帮助我就太好了。
最佳答案
getPivotalProjects
可以简化为:
export async function getPivotalProjects(token) {
const clientTracker = new tracker.Client(token);
await new Promise((resolve, reject) => {
clientTracker.projects.all((error, projects) => (projects ? resolve(projects) : reject(error)));
});
}
...它可以这样测试:
let clientStub;
beforeEach(() => {
clientStub = sinon.stub(tracker, 'Client');
});
it('should do the request to get the activities from projects.', async () => {
const allSpy = sinon.spy();
clientStub.callsFake((token) => ({ projects: { all: allSpy } }));
const promise = PivotalTrackerApi.getPivotalProjects('token');
sinon.assert.calledWith(clientStub, 'token'); // Success!
sinon.assert.called(allSpy); // Success!
const callback = allSpy.lastCall.args[0];
callback(null, 'my projects');
const result = await promise;
expect(result).to.equal('my projects'); // Success!
});
关于javascript - 有没有一个函数可以测试一个在js中有回调的对象实例?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55310380/