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test.js
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test.js
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// 只是在开发时的测试代码😀
const MyPromise = require('./promise.js')
// Promise.all
// 包括非promise,全部resolve
pa1 = MyPromise.all([resAfter(1, 1000), resAfter(2, 3000), resAfter(3, 1500), Math.PI])
.then(console.log, console.log)
// 某个promise会reject
pa2 = MyPromise.all([resAfter(1, 1000), resAfter(2, 3000, false), resAfter(3, 1500)])
pa2.then(console.log, console.log.bind(null, 'fail: '))
// Promise.race
pr1 = MyPromise.race([resAfter(1, 1000), resAfter(2, 1500), resAfter('err', 300, false)])
pr1.then(console.log, console.log.bind(null, 'fail: '))
// then
p1 = new MyPromise((res, rej) => {
setTimeout(function () {
res('v1')
res('v2')
}, 2000);
})
p2 = p1.then((val) => {
console.log(val)
return p2r = resAfter('replace', 1000, false)
})
p3 = p2.then((val) => {
console.log('p2succ: ' + val)
}, (err) => {
console.log('p2fail: ' + err)
})
// helper
setTimeout(_ => _, 2 ** 30)
function resAfter(val, time, isResolve = true) {
return new MyPromise((res, rej) => {
setTimeout(() => {
let which = isResolve ? res : rej
which(val)
}, time);
})
}