test-browser.js
631422e9a504validity_dates

test-browser.js
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			var stream = require('stream')
			var pump = require('./index')

			var rs = new stream.Readable()
			var ws = new stream.Writable()

			rs._read = function (size) {
			this.push(Buffer(size).fill('abc'))
			}

			ws._write = function (chunk, encoding, cb) {
			setTimeout(function () {
			cb()
			}, 100)
			}

			var toHex = function () {
			var reverse = new (require('stream').Transform)()

			reverse._transform = function (chunk, enc, callback) {
			reverse.push(chunk.toString('hex'))
			callback()
			}

			return reverse
			}

			var wsClosed = false
			var rsClosed = false
			var callbackCalled = false

			var check = function () {
			if (wsClosed && rsClosed && callbackCalled) {
			console.log('test-browser.js passes')
			clearTimeout(timeout)
			}
			}

			ws.on('finish', function () {
			wsClosed = true
			check()
			})

			rs.on('end', function () {
			rsClosed = true
			check()
			})

			var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {
			callbackCalled = true
			check()
			})

			if (res !== ws) {
			throw new Error('should return last stream')
			}

			setTimeout(function () {
			rs.push(null)
			rs.emit('close')
			}, 1000)

			var timeout = setTimeout(function () {
			check()
			throw new Error('timeout')
			}, 5000)