Swap-Aggregator-Subgraph/node_modules/pull-defer/test/source.js

var tape = require('tape')
var defer = require('../source')
var pull = require('pull-stream')

tape('defer', function (t) {

  var deferred = defer()

  pull(
    deferred,
    pull.map(function (e) { return e*5 }),
    pull.collect(function (err, ary) {
      if(err) throw err
      t.deepEqual(ary, [5, 10, 15, 20, 25])
      t.end()
    })
  )

  deferred.resolve(pull.values([1,2,3,4,5]))


})


tape('defer - resolve early', function (t) {

  var deferred = defer()

  deferred.resolve(pull.values([1,2,3,4,5]))

  pull(
    deferred,
    pull.map(function (e) { return e*5 }),
    pull.collect(function (err, ary) {
      if(err) throw err
      t.deepEqual(ary, [5, 10, 15, 20, 25])
      t.end()
    })
  )

})

tape('defer, abort before connecting', function (t) {

  
  var deferred = defer()

  //abort the deferred stream immediately.
  deferred(true, function () {
    console.log('ended')
    t.ok(true)
  })

  deferred.resolve(pull.values([1,2,3], function () {
    console.log('aborted')
    t.ok(true)
    t.end()
  }))

})

tape('defer, read and abort before connecting', function (t) {

  
  var deferred = defer(), ended = false

  //queue a read immediately

  deferred(null, function (end, data) {
    t.notOk(end)
    t.notOk(ended)
    t.equal(data, 1)
  })

  //abort the deferred stream immediately.
  deferred(true, function () {
    t.ok(ended = true)
  })

  deferred.resolve(pull.values([1,2,3], function () {
    console.log('aborted')
    t.ok(true)
    t.end()
  }))

})