unexpected-eventemitter

EventEmitter assertions for Unexpected

Installation

Requires Node.js v6 or newer

$ npm i unexpected unexpected-eventemitter -D

Example

const unexpected = require('unexpected');
const uee = require('unexpected-eventemitter');
const {EventEmitter} = require('events');

const expect = unexpected.clone()
  .use(uee);

const ee = new EventEmitter();
expect(() => ee.emit('foo', {bar: 'baz'}), 'to emit from', ee, 'foo', {
  bar: 'baz'
});

Assertions

to emit from

<function> [not] to emit from <EventEmitter> <string> <any*>

• EventEmitter may be a duck-typed Node.js EventEmitter.
• <any*> corresponds to zero (0) or more values which may be emitted.
• An EventEmitter emitting more values than expected will not fail an assertion.
• Values are checked with "to satisfy" for flexibility.

License

©️ 2017 Christopher Hiller. Licensed Apache-2.0.