eventuate-map

create a mapped eventuate

example

var eventuate = require('eventuate'),
    map       = require('eventuate-map')

var pie = eventuate()
pie(function (p) {
    console.log('%s served...', p.type)
})

var addTopping = map(pie, function (pie) {
    switch (pie.type) {
        case 'shoofly':
            pie.topping = 'vanilla ice cream'
            break
        case 'pumpkin':
            pie.topping = 'whipped cream'
            break
        case 'apple':
            pie.topping = 'maple walnut syrup'
            break
        default:
            pie.topping = 'a cherry'
    }
    return pie
})

addTopping(function (p) {
    console.log('Love %s on my %s pie', p.topping, p.type)
})

pie.produce({type: 'apple' })
pie.produce({type: 'shoofly' })
pie.produce({type: 'pumpkin' })

api

var eventuate = require('eventuate')
var map       = require('eventuate-map')

var upstreamEventuate = eventuate()

var mappedEventuate = map(upstreamEventuate, mapFunc)

Returns a new eventuate which produces mapped event payloads from eventuate upstreamEventuate using mapFunc . mapFunc should have the signature function (data) { }, and return the mapped payload. This function receives all event data from upstreamEventuate.

If upstreamEventuate is an unmonitored eventuate, filteredEventuate will return an unmonitored eventuate.

mappedEventuate.unsubscribe()

Stop consuming events from upstreamEventuate (and thus stop producing events).

mappedEventuate.upstreamConsumer

The function added as a consumer to the upstreamEventuate. Example:

var consumerIdx = upstreamEventuate.consumers.indexOf(mappedEventuate.upstreamConsumer)
assert(consumerIdx >= 0)

install

With npm do:

npm install eventuate-map

testing

npm test [--dot | --spec] [--phantom] [--grep=pattern]

Specifying --dot or --spec will change the output from the default TAP style. Specifying --phantom will cause the tests to run in the headless phantom browser instead of node. Specifying --grep will only run the test files that match the given pattern.

browser test

npm run browser-test

This will run the tests in all browsers (specified in .zuul.yml). Be sure to educate zuul first.

coverage

npm run coverage [--html]

This will output a textual coverage report. Including --html will also open an HTML coverage report in the default browser.