577 lines
12 KiB
JavaScript
577 lines
12 KiB
JavaScript
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'use strict'
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var test = require('tape').test
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var from = require('from2')
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var sink = require('flush-write-stream')
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var cloneable = require('./')
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test('basic passthrough', function (t) {
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t.plan(2)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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cb()
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}))
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})
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test('clone sync', function (t) {
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t.plan(4)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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var cloned = instance.clone()
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t.notOk(read, 'stream not started')
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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cb()
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}))
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cloned.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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cb()
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}))
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})
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test('clone async', function (t) {
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t.plan(4)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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var cloned = instance.clone()
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t.notOk(read, 'stream not started')
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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cb()
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}))
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setImmediate(function () {
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cloned.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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cb()
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}))
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})
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})
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test('basic passthrough in obj mode', function (t) {
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t.plan(2)
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var read = false
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var source = from.obj(function (size, next) {
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if (read) {
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return this.push(null)
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} else {
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read = true
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this.push({ hello: 'world' })
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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instance.pipe(sink.obj(function (chunk, enc, cb) {
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t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
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cb()
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}))
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})
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test('multiple clone in object mode', function (t) {
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t.plan(4)
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var read = false
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var source = from.obj(function (size, next) {
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if (read) {
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return this.push(null)
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} else {
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read = true
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this.push({ hello: 'world' })
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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var cloned = instance.clone()
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t.notOk(read, 'stream not started')
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instance.pipe(sink.obj(function (chunk, enc, cb) {
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t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
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cb()
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}))
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setImmediate(function () {
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cloned.pipe(sink.obj(function (chunk, enc, cb) {
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t.deepEqual(chunk, { hello: 'world' }, 'chunk matches')
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cb()
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}))
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})
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})
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test('basic passthrough with data event', function (t) {
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t.plan(2)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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var data = ''
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instance.on('data', function (chunk) {
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data += chunk.toString()
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})
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instance.on('end', function () {
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t.equal(data, 'hello world', 'chunk matches')
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})
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})
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test('basic passthrough with data event on clone', function (t) {
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t.plan(3)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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var cloned = instance.clone()
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t.notOk(read, 'stream not started')
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var data = ''
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cloned.on('data', function (chunk) {
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data += chunk.toString()
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})
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cloned.on('end', function () {
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t.equal(data, 'hello world', 'chunk matches in clone')
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})
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches in instance')
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cb()
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}))
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})
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test('errors if cloned after start', function (t) {
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t.plan(2)
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var source = from(function (size, next) {
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this.push('hello world')
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this.push(null)
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next()
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})
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var instance = cloneable(source)
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches')
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t.throws(function () {
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instance.clone()
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}, 'throws if cloned after start')
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cb()
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}))
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})
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test('basic passthrough with readable event', function (t) {
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t.plan(2)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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t.notOk(read, 'stream not started')
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var data = ''
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instance.on('readable', function () {
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var chunk
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while ((chunk = this.read()) !== null) {
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data += chunk.toString()
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}
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})
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instance.on('end', function () {
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t.equal(data, 'hello world', 'chunk matches')
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})
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})
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test('basic passthrough with readable event on clone', function (t) {
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t.plan(3)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} else {
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read = true
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this.push('hello world')
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}
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next()
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})
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var instance = cloneable(source)
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var cloned = instance.clone()
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t.notOk(read, 'stream not started')
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var data = ''
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cloned.on('readable', function () {
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var chunk
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while ((chunk = this.read()) !== null) {
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data += chunk.toString()
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}
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})
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cloned.on('end', function () {
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t.equal(data, 'hello world', 'chunk matches in clone')
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})
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instance.pipe(sink(function (chunk, enc, cb) {
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t.equal(chunk.toString(), 'hello world', 'chunk matches in instance')
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cb()
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}))
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})
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test('source error destroys all', function (t) {
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t.plan(5)
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var source = from()
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var instance = cloneable(source)
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var clone = instance.clone()
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source.on('error', function (err) {
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t.ok(err, 'source errors')
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instance.on('error', function (err2) {
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t.ok(err === err2, 'instance receives same error')
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})
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instance.on('close', function () {
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t.pass('instance is closed')
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})
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clone.on('error', function (err3) {
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t.ok(err === err3, 'clone receives same error')
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})
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clone.on('close', function () {
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t.pass('clone is closed')
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})
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})
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source.emit('error', new Error())
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})
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test('source destroy destroys all', function (t) {
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t.plan(2)
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var source = from()
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var instance = cloneable(source)
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var clone = instance.clone()
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instance.on('close', function () {
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t.pass('instance is closed')
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})
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clone.on('close', function () {
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t.pass('clone is closed')
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})
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source.destroy()
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})
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test('instance error destroys all but the source', function (t) {
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t.plan(4)
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var source = from()
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var instance = cloneable(source)
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var clone = instance.clone()
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source.on('close', function () {
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t.fail('source should not be closed')
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})
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instance.on('error', function (err) {
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t.is(err.message, 'beep', 'instance errors')
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instance.on('close', function () {
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t.pass('instance is closed')
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})
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clone.on('error', function (err3) {
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t.ok(err === err3, 'clone receives same error')
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})
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clone.on('close', function () {
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t.pass('clone is closed')
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})
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})
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instance.destroy(new Error('beep'))
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})
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test('instance destroy destroys all but the source', function (t) {
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t.plan(2)
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var source = from()
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var instance = cloneable(source)
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var clone = instance.clone()
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source.on('close', function () {
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t.fail('source should not be closed')
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})
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instance.on('close', function () {
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t.pass('instance is closed')
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})
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clone.on('close', function () {
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t.pass('clone is closed')
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})
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instance.destroy()
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})
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test('clone destroy does not affect other clones, cloneable or source', function (t) {
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t.plan(1)
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var source = from()
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var instance = cloneable(source)
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var clone = instance.clone()
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var other = instance.clone()
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source.on('close', function () {
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t.fail('source should not be closed')
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})
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instance.on('close', function () {
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t.fail('instance should not be closed')
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})
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other.on('close', function () {
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t.fail('other clone should not be closed')
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})
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clone.on('close', function () {
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t.pass('clone is closed')
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})
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clone.destroy()
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})
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test('clone remains readable if other is destroyed', function (t) {
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t.plan(3)
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var read = false
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var source = from(function (size, next) {
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if (read) {
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this.push(null)
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} 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')
|
||
|
|
})
|