chai as promise文档有以下在同一测试中处理多个promise的示例:
it("should all be well", function (done) {
Q.all([
promiseA.should.become("happy"),
promiseB.should.eventually.have.property("fun times"),
promiseC.should.be.rejectedWith(TypeError, "only joyful types are allowed")
]).should.notify(done);
});
我假设这里的Q
来自npm install q
和var Q = require('q');
。
.should
来自哪里?
当我尝试这个should
是undefined
,我得到TypeError: Cannot call method 'notify' of undefined
。
有没有Q
的猴子补丁应该先发生?或者我用错了什么版本?
我用的是带量角器的黄瓜。据我所知,他们还不支持返回promise,所以用户必须处理对done
的调用。
回答我自己的问题:
.should
来自"应该"断言风格-http://chaijs.com/guide/styles/#should.您需要运行:
chai.should();
在var Q = require('q');
之后但在Q.all([]).should.notify...
之前:
var Q = require('q');
var chai = require('chai');
var chaiAsPromised = require('chai-as-promised');
// ***************
chai.should();
// ***************
chai.use(chaiAsPromised);
it("should all be well", function (done) {
Q.all([
promiseA.should.become("happy"),
promiseB.should.eventually.have.property("fun times"),
promiseC.should.be.rejectedWith(TypeError, "only joyful types are allowed")
]).should.notify(done);
});
根据文件:
这将把单个promise断言的任何失败传递给测试框架
如果我理解正确,Q-promise不应该,我建议你试试这个
it("should all be well", function (done) {
Q.all([
promiseA.should.become("happy"),
promiseB.should.eventually.have.property("fun times"),
promiseC.should.be.rejectedWith(TypeError, "only joyful types are allowed")
]).then(done);
});
也可以使用required mocha-as-promised
,如下所示:
require("mocha-as-promised")();
it("should all be well", function (done) {
return Q.all([
promiseA.then(function(someData){
//here standart chai validation;
}),
promiseB.then(function(someData){
//here standart chai validation;
});
]).then(done);
});
好的,你会在代码中添加下一行吗?
var chai = require("chai");
var chaiAsPromised = require("chai-as-promised");
chai.use(chaiAsPromised);