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node_modules/through/test/async.js 629 Bytes
ce4c83ff   wxy   初始提交
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  var from = require('from')
  var through = require('../')
  
  var tape = require('tape')
  
  tape('simple async example', function (t) {
   
    var n = 0, expected = [1,2,3,4,5], actual = []
    from(expected)
    .pipe(through(function(data) {
      this.pause()
      n ++
      setTimeout(function(){
        console.log('pushing data', data)
        this.push(data)
        this.resume()
      }.bind(this), 300)
    })).pipe(through(function(data) {
      console.log('pushing data second time', data);
      this.push(data)
    })).on('data', function (d) {
      actual.push(d)
    }).on('end', function() {
      t.deepEqual(actual, expected)
      t.end()
    })
  
  })