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问题描述
我正在按承诺对Mocha + Chai进行一些单元测试
I am trying out a bit of unit testing with Mocha + Chai as promised
'use strict';
var chai = require('chai').use(require('chai-as-promised'))
var should = chai.should();
describe('Testing how promises work', () => {
it("should work right", function(){
class SomeClass {
constructor() {
this.x = 0;
}
getSomething(inputVal) {
let self = this;
return new Promise((resolve, reject) => {
setTimeout(function(){
if(inputVal){
self.x = 1;
resolve();
}
else{
self.x = -1;
reject();
}
}, 10);
});
}
}
var z = new SomeClass();
return z.getSomething(true).should.eventually.be.fulfilled
});
});
测试通过.但我想检查诺言是否已解决后的z.x equals 1
值.我该怎么办?
Test does pass. But I would like to check if the value of z.x equals 1
after the promise has been resolved. How do I do that?
这只是一个原型.我想在我的真实案例中测试更多该物业
this is just a prototype. I would like to test more that one property in my real case
推荐答案
chai-as-promised
添加到Chai的断言本身就是承诺.因此,您可以在这些断言上调用.then
.因此,根据您的情况,将您的return
更改为:
The assertions that chai-as-promised
adds to Chai are themselves promises. So you can call .then
on those assertions. So in your case, change your return
to:
return z.getSomething(true).should.eventually.be.fulfilled
.then(() => z.should.have.property("x").equal(1));
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