使用 proxyquire、sinon 和 mocha。
我能够在第一次调用 fetch 时存根 fetch。但是在第二个递归调用中,我无法断言它。从输出来看,断言可能会在测试完成之前运行。second fetch
在断言之后,您将在控制台输出中看到这一点。
index.js
var fetch = require('node-fetch');
function a() {
console.log('function a runs');
fetch('https://www.google.com')
.then((e) => {
console.log('first fetch');
b();
})
.catch((e)=> {
console.log('error')
});
}
function b() {
fetch('https://www.google.com')
.then((e) => {
console.log('second fetch');
})
.catch((e)=> {
console.log('error')
});
}
a()
测试:
describe('fetch test demo', ()=> {
it('fetch should of called twice', (done)=> {
fetchStub = sinon.stub();
fetchStub2 = sinon.stub();
fetch = sinon.stub();
fetchStub.returns(Promise.resolve('hello'));
fetchStub2.returns(Promise.resolve('hi'));
var promises = [ fetchStub, fetchStub2 ]
fetch.returns(Promise.all(promises));
proxy('../index', {
'node-fetch': fetch
});
fetch.should.have.been.callCount(2);
done()
});
});
fetch test demo
function a runs
1) fetch should of called twice
first fetch
second fetch
lifx alert test
- fetch should of called three times
when rain change is over 50%
- should run fetch twice
0 passing (78ms)
2 pending
1 failing
1) fetch test demo fetch should of called twice:
expected stub to have been called exactly twice, but it was called once
stub(https://www.google.com) => [Promise] { } at a (/home/one/github/lifx-weather/foobar.js:5:3)
AssertionError: expected stub to have been called exactly twice, but it was called once
stub(https://www.google.com) => [Promise] { } at a (foobar.js:5:3)
at Context.it (test/bar.js:22:28)