assert-called 

Assert that your callback got called.

Installation

npm install assert-called

Usage

``js
var cb = require('assert-called');

function notCalling(cb) {
}

function notCalled() {
}

process.nextTick(cb(function () {
console.log('called');
}));

notCalling(cb(notCalled));
`

Will output:

`
called

/Users/maciej/dev/js/assert-called/lib/assert-called.js:20
throw new assert.AssertionError({
^
AssertionError: 1 callback not called:
notCalled
`

How it works


assert-called attaches a process.on('exit')` listener to make sure that
all registered callbacks are eventually called.