A Vow with asynchronous teardown in CoffeScript

vow_with_async_teardown_in_coffee.coffee

assert = require 'assert'
vows   = require 'vows'

tornDown = false
vows.describe('Vows with asynchronous teardowns').addBatch
	'Context with long-running teardown':
		'is run first': () ->
		teardown: () ->
			callback = @callback
			setTimeout(() ->
				tornDown = true
				callback()
				return
			, 1000)
			return
.addBatch
	'The next batch':
		'is not run until the teardown is complete': () ->
			assert.ok tornDown
.export module