用于 RxJS 可观察对象的 Chai 断言

ChaiRx 扩展了 Chai，并提供了一个简单的实用方法 emit，用于使用 Rx.TestScheduler 测试来自 RxJS 可观察流的事件。

import Rx from 'rx';
import chai from 'chai';
import chaiRx from 'chai-rx';

chai.use(chaiRx);

const { onNext, onCompleted } = Rx.ReactiveTest;
const scheduler = new Rx.TestScheduler();

const xs = scheduler.createHotObservable(
  onNext(150, 1),
  onNext(210, 2),
  onNext(220, 3),
  onCompleted(230)
);

// Note we'll start at 200 for subscribe, hence missing the 150 mark
const output = scheduler.startScheduler(() => xs.map(x => x * x), {
  created: 100,
  subscribed: 200,
  disposed: 300
});

expect(output).to.emit([
  onNext(210, 4),
  onNext(220, 9),
  onCompleted(230)
]);

用法

expect / should 语法

const xs = scheduler.createHotObservable(onNext(250, { 'foo': 'bar' }), onError(300, new Error('An error')));
const output = scheduler.startScheduler(() => xs);

// expect
expect(output).to.emit([
  onNext(250, { 'foo': 'bar' }),
  onError(300, ({error}) => error.message === 'An error')
]);

// should
output.should.emit([
  onNext(250, { 'foo': 'bar' }),
  onError(300, ({error}) => error.message === 'An error')
]);

语言链

const const xs = scheduler.createHotObservable(onNext(250));
const output = scheduler.startScheduler(() => xs);

// with `not`
expect(output).to.not.emit([
  onNext(300)
]);

安装

npm install chai-rx

ES6 导入

import chai from 'chai';
import chaiRx from 'chai-rx';

chai.use(chaiRx);

AMD

var chai = require('chai');
var chaiRx = require('chai-rx');

chai.use(chaiRx);

<script> 标签

如果您使用 <script> 标签直接包含 ChaiRx，在 Chai 本身之后，它将自动插入到 Chai 中，并准备使用。

<script src="chai.js"></script>
<script src="chai-rx.js"></script>