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const { test } = require('tap')
const { join } = require('path')
const { readFile } = require('fs')
const { file } = require('./helper')
const ThreadStream = require('..')
const { MessageChannel } = require('worker_threads')
const { once } = require('events')
test('base sync=true', function (t) {
t.plan(15)
const dest = file()
const stream = new ThreadStream({
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: true
})
t.same(stream.writableObjectMode, false)
t.same(stream.writableFinished, false)
stream.on('finish', () => {
t.same(stream.writableFinished, true)
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data, 'hello world\nsomething else\n')
})
})
t.same(stream.closed, false)
stream.on('close', () => {
t.same(stream.closed, true)
t.notOk(stream.writable)
t.pass('close emitted')
})
t.same(stream.writableNeedDrain, false)
t.ok(stream.write('hello world\n'))
t.ok(stream.write('something else\n'))
t.ok(stream.writable)
t.same(stream.writableEnded, false)
stream.end()
t.same(stream.writableEnded, true)
})
test('overflow sync=true', function (t) {
t.plan(3)
const dest = file()
const stream = new ThreadStream({
bufferSize: 128,
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: true
})
let count = 0
// Write 10 chars, 20 times
function write () {
if (count++ === 20) {
stream.end()
return
}
stream.write('aaaaaaaaaa')
// do not wait for drain event
setImmediate(write)
}
write()
stream.on('finish', () => {
t.pass('finish emitted')
})
stream.on('close', () => {
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data.length, 200)
})
})
})
test('overflow sync=false', function (t) {
const dest = file()
const stream = new ThreadStream({
bufferSize: 128,
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: false
})
let count = 0
t.same(stream.writableNeedDrain, false)
// Write 10 chars, 20 times
function write () {
if (count++ === 20) {
t.pass('end sent')
stream.end()
return
}
if (!stream.write('aaaaaaaaaa')) {
t.same(stream.writableNeedDrain, true)
}
// do not wait for drain event
setImmediate(write)
}
write()
stream.on('drain', () => {
t.same(stream.writableNeedDrain, false)
t.pass('drain')
})
stream.on('finish', () => {
t.pass('finish emitted')
})
stream.on('close', () => {
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data.length, 200)
t.end()
})
})
})
test('over the bufferSize at startup', function (t) {
t.plan(6)
const dest = file()
const stream = new ThreadStream({
bufferSize: 10,
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: true
})
stream.on('finish', () => {
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data, 'hello world\nsomething else\n')
})
})
stream.on('close', () => {
t.pass('close emitted')
})
t.ok(stream.write('hello'))
t.ok(stream.write(' world\n'))
t.ok(stream.write('something else\n'))
stream.end()
})
test('over the bufferSize at startup (async)', function (t) {
t.plan(6)
const dest = file()
const stream = new ThreadStream({
bufferSize: 10,
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: false
})
t.ok(stream.write('hello'))
t.notOk(stream.write(' world\n'))
t.notOk(stream.write('something else\n'))
stream.end()
stream.on('finish', () => {
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data, 'hello world\nsomething else\n')
})
})
stream.on('close', () => {
t.pass('close emitted')
})
})
test('flushSync sync=false', function (t) {
const dest = file()
const stream = new ThreadStream({
bufferSize: 128,
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: false
})
stream.on('drain', () => {
t.pass('drain')
stream.end()
})
stream.on('finish', () => {
t.pass('finish emitted')
})
stream.on('close', () => {
readFile(dest, 'utf8', (err, data) => {
t.error(err)
t.equal(data.length, 200)
t.end()
})
})
for (let count = 0; count < 20; count++) {
stream.write('aaaaaaaaaa')
}
stream.flushSync()
})
test('pass down MessagePorts', async function (t) {
t.plan(3)
const { port1, port2 } = new MessageChannel()
const stream = new ThreadStream({
filename: join(__dirname, 'port.js'),
workerData: { port: port1 },
workerOpts: {
transferList: [port1]
},
sync: false
})
t.teardown(() => {
stream.end()
})
t.ok(stream.write('hello world\n'))
t.ok(stream.write('something else\n'))
const [strings] = await once(port2, 'message')
t.equal(strings, 'hello world\nsomething else\n')
})
test('destroy does not error', function (t) {
t.plan(5)
const dest = file()
const stream = new ThreadStream({
filename: join(__dirname, 'to-file.js'),
workerData: { dest },
sync: false
})
stream.on('ready', () => {
t.pass('ready emitted')
stream.worker.terminate()
})
stream.on('error', (err) => {
t.equal(err.message, 'the worker thread exited')
stream.flush((err) => {
t.equal(err.message, 'the worker has exited')
})
t.doesNotThrow(() => stream.flushSync())
t.doesNotThrow(() => stream.end())
})
})
test('syntax error', function (t) {
t.plan(1)
const stream = new ThreadStream({
filename: join(__dirname, 'syntax-error.mjs')
})
stream.on('error', (err) => {
t.equal(err.message, 'Unexpected end of input')
})
})
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