wishthis/node_modules/cloneable-readable/test.js
2022-01-21 09:28:41 +01:00

702 lines
14 KiB
JavaScript

'use strict'
var fs = require('fs')
var path = require('path')
var test = require('tape').test
var from = require('from2')
var crypto = require('crypto')
var sink = require('flush-write-stream')
var pump = require('pump')
var cloneable = require('./')
test('basic passthrough', function (t) {
t.plan(2)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
})
test('clone sync', function (t) {
t.plan(4)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var cloned = instance.clone()
t.notOk(read, 'stream not started')
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
cloned.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
})
test('clone async', function (t) {
t.plan(4)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var cloned = instance.clone()
t.notOk(read, 'stream not started')
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
setImmediate(function () {
cloned.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
})
})
test('basic passthrough in obj mode', function (t) {
t.plan(2)
var read = false
var source = from.obj(function (size, next) {
if (read) {
return this.push(null)
} else {
read = true
this.push({ hello: 'world' })
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
instance.pipe(sink.obj(function (chunk, enc, cb) {
t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
cb()
}))
})
test('multiple clone in object mode', function (t) {
t.plan(4)
var read = false
var source = from.obj(function (size, next) {
if (read) {
return this.push(null)
} else {
read = true
this.push({ hello: 'world' })
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var cloned = instance.clone()
t.notOk(read, 'stream not started')
instance.pipe(sink.obj(function (chunk, enc, cb) {
t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
cb()
}))
setImmediate(function () {
cloned.pipe(sink.obj(function (chunk, enc, cb) {
t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
cb()
}))
})
})
test('basic passthrough with data event', function (t) {
t.plan(2)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var data = ''
instance.on('data', function (chunk) {
data += chunk.toString()
})
instance.on('end', function () {
t.equal(data, 'hello world', 'chunk matches')
})
})
test('basic passthrough with data event on clone', function (t) {
t.plan(3)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
var cloned = instance.clone()
t.notOk(read, 'stream not started')
var data = ''
cloned.on('data', function (chunk) {
data += chunk.toString()
})
cloned.on('end', function () {
t.equal(data, 'hello world', 'chunk matches in clone')
})
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches in instance')
cb()
}))
})
test('errors if cloned after start', function (t) {
t.plan(2)
var source = from(function (size, next) {
this.push('hello world')
this.push(null)
next()
})
var instance = cloneable(source)
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
t.throws(function () {
instance.clone()
}, 'throws if cloned after start')
cb()
}))
})
test('basic passthrough with readable event', function (t) {
t.plan(2)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var data = ''
instance.on('readable', function () {
var chunk
while ((chunk = this.read()) !== null) {
data += chunk.toString()
}
})
instance.on('end', function () {
t.equal(data, 'hello world', 'chunk matches')
})
})
test('basic passthrough with readable event on clone', function (t) {
t.plan(3)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
var cloned = instance.clone()
t.notOk(read, 'stream not started')
var data = ''
cloned.on('readable', function () {
var chunk
while ((chunk = this.read()) !== null) {
data += chunk.toString()
}
})
cloned.on('end', function () {
t.equal(data, 'hello world', 'chunk matches in clone')
})
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches in instance')
cb()
}))
})
test('source error destroys all', function (t) {
t.plan(3)
var source = from()
var instance = cloneable(source)
var clone = instance.clone()
source.on('error', function (err) {
t.ok(err, 'source errors')
instance.on('error', function (err2) {
t.ok(err === err2, 'instance receives same error')
})
clone.on('error', function (err3) {
t.ok(err === err3, 'clone receives same error')
})
})
source.emit('error', new Error())
})
test('source destroy destroys all', function (t) {
t.plan(2)
var source = from()
var instance = cloneable(source)
var clone = instance.clone()
instance.on('end', function () {
t.pass('instance has ended')
})
clone.on('end', function () {
t.pass('clone has ended')
})
clone.resume()
instance.resume()
source.destroy()
})
test('instance error destroys all but the source', function (t) {
t.plan(2)
var source = from()
var instance = cloneable(source)
var clone = instance.clone()
source.on('close', function () {
t.fail('source should not be closed')
})
instance.on('error', function (err) {
t.is(err.message, 'beep', 'instance errors')
})
instance.on('close', function () {
t.fail('close should not be emitted')
})
clone.on('error', function (err) {
t.is(err.message, 'beep', 'instance errors')
})
clone.on('close', function () {
t.fail('close should not be emitted')
})
instance.destroy(new Error('beep'))
})
test('instance destroy destroys all but the source', function (t) {
t.plan(2)
var source = from()
var instance = cloneable(source)
var clone = instance.clone()
source.on('close', function () {
t.fail('source should not be closed')
})
instance.on('end', function () {
t.pass('instance has ended')
})
clone.on('end', function () {
t.pass('clone has ended')
})
instance.resume()
clone.resume()
instance.destroy()
})
test('clone destroy does not affect other clones, cloneable or source', function (t) {
t.plan(1)
var source = from()
var instance = cloneable(source)
var clone = instance.clone()
var other = instance.clone()
source.on('close', function () {
t.fail('source should not be closed')
})
instance.on('close', function () {
t.fail('instance should not be closed')
})
other.on('close', function () {
t.fail('other clone should not be closed')
})
clone.on('close', function () {
t.pass('clone is closed')
})
clone.destroy()
})
test('clone remains readable if other is destroyed', function (t) {
t.plan(3)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello')
}
next()
})
var instance = cloneable(source)
var clone = instance.clone()
var other = instance.clone()
instance.pipe(sink.obj(function (chunk, enc, cb) {
t.deepEqual(chunk.toString(), 'hello', 'instance chunk matches')
cb()
}))
clone.pipe(sink.obj(function (chunk, enc, cb) {
t.deepEqual(chunk.toString(), 'hello', 'clone chunk matches')
cb()
}))
clone.on('close', function () {
t.fail('clone should not be closed')
})
instance.on('close', function () {
t.fail('instance should not be closed')
})
other.on('close', function () {
t.pass('other is closed')
})
other.destroy()
})
test('clone of clone', function (t) {
t.plan(6)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var cloned = instance.clone()
t.notOk(read, 'stream not started')
var replica = cloned.clone()
t.notOk(read, 'stream not started')
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
cloned.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
replica.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), 'hello world', 'chunk matches')
cb()
}))
})
test('from vinyl', function (t) {
t.plan(3)
var source = from(['wa', 'dup'])
var instance = cloneable(source)
var clone = instance.clone()
var data = ''
var data2 = ''
var ends = 2
function latch () {
if (--ends === 0) {
t.equal(data, data2)
}
}
instance.on('data', function (chunk) {
data += chunk.toString()
})
process.nextTick(function () {
t.equal('', data, 'nothing was written yet')
t.equal('', data2, 'nothing was written yet')
clone.on('data', function (chunk) {
data2 += chunk.toString()
})
})
instance.on('end', latch)
clone.on('end', latch)
})
test('waits till all are flowing', function (t) {
t.plan(1)
var source = from(['wa', 'dup'])
var instance = cloneable(source)
// we create a clone
instance.clone()
instance.on('data', function (chunk) {
t.fail('this should never happen')
})
process.nextTick(function () {
t.pass('wait till nextTick')
})
})
test('isCloneable', function (t) {
t.plan(4)
var source = from(['hello', ' ', 'world'])
t.notOk(cloneable.isCloneable(source), 'a generic readable is not cloneable')
var instance = cloneable(source)
t.ok(cloneable.isCloneable(instance), 'a cloneable is cloneable')
var clone = instance.clone()
t.ok(cloneable.isCloneable(clone), 'a clone is cloneable')
var cloneClone = clone.clone()
t.ok(cloneable.isCloneable(cloneClone), 'a clone of a clone is cloneable')
})
test('emits finish', function (t) {
var chunks = ['a', 'b', 'c', 'd', null]
var e1 = ['a', 'b', 'c', 'd']
var e2 = ['a', 'b', 'c', 'd']
t.plan(2 + e1.length + e2.length)
var source = from(function (size, next) {
setImmediate(next, null, chunks.shift())
})
var instance = cloneable(source)
var clone = instance.clone()
clone.on('finish', t.pass.bind(null, 'clone emits finish'))
instance.on('finish', t.pass.bind(null, 'main emits finish'))
instance.pipe(sink(function (chunk, enc, cb) {
t.equal(chunk.toString(), e1.shift(), 'chunk matches')
cb()
}))
clone.on('data', function (chunk) {
t.equal(chunk.toString(), e2.shift(), 'chunk matches')
})
})
test('clone async w resume', function (t) {
t.plan(4)
var read = false
var source = from(function (size, next) {
if (read) {
this.push(null)
} else {
read = true
this.push('hello world')
}
next()
})
var instance = cloneable(source)
t.notOk(read, 'stream not started')
var cloned = instance.clone()
t.notOk(read, 'stream not started')
instance.on('end', t.pass.bind(null, 'end emitted'))
instance.resume()
setImmediate(function () {
cloned.on('end', t.pass.bind(null, 'end emitted'))
cloned.resume()
})
})
test('big file', function (t) {
t.plan(13)
var stream = cloneable(fs.createReadStream(path.join(__dirname, 'big')))
var hash = crypto.createHash('sha1')
hash.setEncoding('hex')
var toCheck
fs.createReadStream(path.join(__dirname, 'big'))
.pipe(hash)
.once('readable', function () {
toCheck = hash.read()
t.ok(toCheck)
})
function pipe (s, num) {
s.on('end', function () {
t.pass('end for ' + num)
})
var dest = path.join(__dirname, 'out')
s.pipe(fs.createWriteStream(dest))
.on('finish', function () {
t.pass('finish for ' + num)
var destHash = crypto.createHash('sha1')
destHash.setEncoding('hex')
fs.createReadStream(dest)
.pipe(destHash)
.once('readable', function () {
var hash = destHash.read()
t.ok(hash)
t.equal(hash, toCheck)
})
})
}
// Pipe in another event loop tick <-- this one finished only, it's the original cloneable.
setImmediate(pipe.bind(null, stream, 1))
// Pipe in the same event loop tick
pipe(stream.clone(), 0)
// Pipe a long time after
setTimeout(pipe.bind(null, stream.clone(), 2), 1000)
})
test('pump error', function (t) {
t.plan(1)
var err = new Error('kaboom')
pump([
cloneable(from(function () {
this.destroy(err)
})),
sink(function (chunk, enc, cb) {
t.fail('this should not be called')
})
], function (_err) {
t.equal(_err, err)
})
})