|
var test = require('tape')
|
var spec = require('stream-spec')
|
var through = require('../')
|
|
/*
|
I'm using these two functions, and not streams and pipe
|
so there is less to break. if this test fails it must be
|
the implementation of _through_
|
*/
|
|
function write(array, stream) {
|
array = array.slice()
|
function next() {
|
while(array.length)
|
if(stream.write(array.shift()) === false)
|
return stream.once('drain', next)
|
|
stream.end()
|
}
|
|
next()
|
}
|
|
function read(stream, callback) {
|
var actual = []
|
stream.on('data', function (data) {
|
actual.push(data)
|
})
|
stream.once('end', function () {
|
callback(null, actual)
|
})
|
stream.once('error', function (err) {
|
callback(err)
|
})
|
}
|
|
test('simple defaults', function(assert) {
|
|
var l = 1000
|
, expected = []
|
|
while(l--) expected.push(l * Math.random())
|
|
var t = through()
|
var s = spec(t).through().pausable()
|
|
read(t, function (err, actual) {
|
assert.ifError(err)
|
assert.deepEqual(actual, expected)
|
assert.end()
|
})
|
|
t.on('close', s.validate)
|
|
write(expected, t)
|
});
|
|
test('simple functions', function(assert) {
|
|
var l = 1000
|
, expected = []
|
|
while(l--) expected.push(l * Math.random())
|
|
var t = through(function (data) {
|
this.emit('data', data*2)
|
})
|
var s = spec(t).through().pausable()
|
|
|
read(t, function (err, actual) {
|
assert.ifError(err)
|
assert.deepEqual(actual, expected.map(function (data) {
|
return data*2
|
}))
|
assert.end()
|
})
|
|
t.on('close', s.validate)
|
|
write(expected, t)
|
})
|
|
test('pauses', function(assert) {
|
|
var l = 1000
|
, expected = []
|
|
while(l--) expected.push(l) //Math.random())
|
|
var t = through()
|
|
var s = spec(t)
|
.through()
|
.pausable()
|
|
t.on('data', function () {
|
if(Math.random() > 0.1) return
|
t.pause()
|
process.nextTick(function () {
|
t.resume()
|
})
|
})
|
|
read(t, function (err, actual) {
|
assert.ifError(err)
|
assert.deepEqual(actual, expected)
|
})
|
|
t.on('close', function () {
|
s.validate()
|
assert.end()
|
})
|
|
write(expected, t)
|
})
|
|
test('does not soft-end on `undefined`', function(assert) {
|
var stream = through()
|
, count = 0
|
|
stream.on('data', function (data) {
|
count++
|
})
|
|
stream.write(undefined)
|
stream.write(undefined)
|
|
assert.equal(count, 2)
|
|
assert.end()
|
})
|
