背景: NodeJS做后端,要写单元测试,使用使用sinon来stub 异步执行的repository。前面都还好好的,突然有一个测试红了,报错Promise returned by test never resolved,是异步方法没有mock成功,但是看发现调用的方法确实是mock了,百思不得其解,最后一个同事发现了问题 代码结构大概这样 1//user.repository23const findUse...
constpromise=newPromise(function(resolve,reject){reject(newError('test'));});promise.catch(function(error){console.log(error);}); 如果Promise状态已经变成resolved,再抛出错误是无效的。因为 Promise 的状态一旦改变,就永久保持该状态,不会再变了: constpromise=newPromise(function(resolve,reject){resolve('...
1. 建立基础的构造函数 需求 基于 Promises/A+ (promisesaplus.com) , 我们需要实现: promise 有三个状态:pending(未完成),fulfilled(完成),or rejected(拒绝)。初始状态为 pending ,且状态结束只能从pending改为
I see in Network tab in Dev tools that a request is made and there are no errors however response data is somehow intercepted by msw and returned data is undefined. I just use simple fetch and logging output, but all I got is this in console: Uncaught (in promise) TypeError: Failed to...
Resolves the promise returned bypromise(). All consumers are notified by having$onFulfilled(which they registered via$promise->then()) called with$value. If$valueitself is a promise, the promise will transition to the state of this promise once it is resolved. ...
Usually you want to mock the whole request function which is returned by require('request-promise'). This is not possible by using a mocking library like sinon.js alone. What you need is a library that ties into the module loader and makes sure that your mock is returned whenever the ...
在第二种情况下，throw位于具有空调用堆栈的setTimeout()回调内（它直接来自事件循环），因此没有人可以...
This is the tenth article in the series of exploring the principles of JS native methods. This article will introduce how to write a Promise A+ spe...
Returns aPromiseobject that is resolved with the given value. If the value is a thenable (i.e. has athenmethod), the returned promise will "follow" that thenable, adopting its eventual state; otherwise the returned promise will be fulfilled with the value. Generally, if you don't know if...
@param {Any} value value that the returned promise will be resolved with Useful for tooling. @return {Promise} a promise that will become fulfilled with the given `value` */ functionresolve$1(object) { /*jshint validthis:true */