Package Exports

pull-stream-model

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (pull-stream-model) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

pull stream model

example

model

var test = require('tape')
var async = require('pull-async')
var cat = require('pull-cat')
var S = require('pull-stream')
var Component = require('../')
var pushable = require('pull-pushable')

function Model () {
    return ''
}
Model.update = {
    bar: function (state, ev) {
        return state + ev
    },
    start: (state, ev) => state + ' resolving',
    resolve: (state, ev) => state.replace(' resolving', '')
}
Model.effects = {
    foo: function (state, msg, ev) {
        return msg.bar(ev + '!!!')
    },
    asyncThing: function (state, msg, ev) {
        return cat([
            S.once(msg.start()),
            async(function (cb) {
                setTimeout(function () {
                    cb(null, msg.resolve())
                }, 100)
            })
        ])
    }
}


test('model', function (t) {
    t.plan(2)
    var model = Component(Model)
    var p = pushable()
    p.push(model.msg.foo('hello'))
    p.push(model.msg.bar(' hi'))
    p.push(model.msg.asyncThing())
    p.end()

    S(
        p,
        // S.through(console.log.bind(console, 'ev')),
        model.effects(),
        model.store,
        S.collect(function (err, res) {
            t.error(err)
            t.deepEqual(res, [
                '',
                'hello!!!',
                'hello!!! hi',
                'hello!!! hi resolving',
                'hello!!! hi'
            ], 'should do the thing')
        })
    )
})

should update

var shouldUpdate = require('pull-stream-model/should-update')

S(
    S.values([1,2,3]),
    shouldUpdate(function (prev, next) {
        return prev + next === 3
    }),
    S.collect(function (err, res) {
        t.error(err)
        t.deepEqual(res, [2], 'should filter the stream')
    })
)