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const os = require('node:os')
const { promises: { readFile }, createWriteStream } = require('node:fs')
const { join } = require('node:path')
const { test } = require('tap')
const { fork } = require('node:child_process')
const writer = require('flush-write-stream')
const {
once,
getPathToNull,
file,
watchFileCreated
} = require('./helper')
const { promisify } = require('node:util')
const sleep = promisify(setTimeout)
test('asynchronous logging', async ({
equal,
teardown
}) => {
const now = Date.now
const hostname = os.hostname
const proc = process
global.process = {
__proto__: process,
pid: 123456
}
Date.now = () => 1459875739796
os.hostname = () => 'abcdefghijklmnopqr'
delete require.cache[require.resolve('../')]
const pino = require('../')
let expected = ''
let actual = ''
const normal = pino(writer((s, enc, cb) => {
expected += s
cb()
}))
const dest = createWriteStream(getPathToNull())
dest.write = (s) => {
actual += s
}
const asyncLogger = pino(dest)
let i = 44
while (i--) {
normal.info('h')
asyncLogger.info('h')
}
const expected2 = expected.split('\n')[0]
let actual2 = ''
const child = fork(join(__dirname, '/fixtures/syncfalse.js'), { silent: true })
child.stdout.pipe(writer((s, enc, cb) => {
actual2 += s
cb()
}))
await once(child, 'close')
// Wait for the last write to be flushed
await sleep(100)
equal(actual, expected)
equal(actual2.trim(), expected2)
teardown(() => {
os.hostname = hostname
Date.now = now
global.process = proc
})
})
test('sync false with child', async ({
equal,
teardown
}) => {
const now = Date.now
const hostname = os.hostname
const proc = process
global.process = {
__proto__: process,
pid: 123456
}
Date.now = function () {
return 1459875739796
}
os.hostname = function () {
return 'abcdefghijklmnopqr'
}
delete require.cache[require.resolve('../')]
const pino = require('../')
let expected = ''
let actual = ''
const normal = pino(writer((s, enc, cb) => {
expected += s
cb()
})).child({ hello: 'world' })
const dest = createWriteStream(getPathToNull())
dest.write = function (s) {
actual += s
}
const asyncLogger = pino(dest).child({ hello: 'world' })
let i = 500
while (i--) {
normal.info('h')
asyncLogger.info('h')
}
asyncLogger.flush()
const expected2 = expected.split('\n')[0]
let actual2 = ''
const child = fork(join(__dirname, '/fixtures/syncfalse-child.js'), { silent: true })
child.stdout.pipe(writer((s, enc, cb) => {
actual2 += s
cb()
}))
await once(child, 'close')
equal(actual, expected)
equal(actual2.trim(), expected2)
teardown(() => {
os.hostname = hostname
Date.now = now
global.process = proc
})
})
test('flush does nothing with sync true (default)', async ({ equal }) => {
const instance = require('..')()
equal(instance.flush(), undefined)
})
test('should still call flush callback even when does nothing with sync true (default)', (t) => {
t.plan(3)
const instance = require('..')()
instance.flush((...args) => {
t.ok('flush called')
t.same(args, [])
// next tick to make flush not called more than once
process.nextTick(() => {
t.ok('flush next tick called')
})
})
})
test('should call the flush callback when flushed the data for async logger', async (t) => {
const outputPath = file()
async function getOutputLogLines () {
return (await readFile(outputPath)).toString().trim().split('\n').map(JSON.parse)
}
const pino = require('../')
const instance = pino({}, pino.destination({
dest: outputPath,
// to make sure it does not flush on its own
minLength: 4096
}))
const flushPromise = promisify(instance.flush).bind(instance)
instance.info('hello')
await flushPromise()
await watchFileCreated(outputPath)
const [firstFlushData] = await getOutputLogLines()
t.equal(firstFlushData.msg, 'hello')
// should not flush this as no data accumulated that's bigger than min length
instance.info('world')
// Making sure data is not flushed yet
const afterLogData = await getOutputLogLines()
t.equal(afterLogData.length, 1)
await flushPromise()
// Making sure data is not flushed yet
const afterSecondFlush = (await getOutputLogLines())[1]
t.equal(afterSecondFlush.msg, 'world')
})
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