sync mode on

node_modules/pino/test/transport/big.test.js

@@ -0,0 +1,42 @@
+'use strict'
+
+const test = require('node:test')
+const assert = require('node:assert')
+const { join } = require('node:path')
+const { createReadStream } = require('node:fs')
+const { promisify } = require('node:util')
+const stream = require('node:stream')
+const execa = require('execa')
+const split = require('split2')
+
+const { file } = require('../helper')
+
+const pipeline = promisify(stream.pipeline)
+const { Writable } = stream
+const sleep = promisify(setTimeout)
+
+const skip = process.env.CI || process.env.CITGM
+
+test('eight million lines', { skip }, async () => {
+  const destination = file()
+  await execa(process.argv[0], [join(__dirname, '..', 'fixtures', 'transport-many-lines.js'), destination])
+
+  if (process.platform !== 'win32') {
+    try {
+      await execa('sync') // Wait for the file to be written to disk
+    } catch {
+      // Just a fallback, this should be unreachable
+    }
+  }
+  await sleep(1_000) // It seems that sync is not enough (even in POSIX systems)
+
+  const toWrite = 8 * 1_000_000
+  let count = 0
+  await pipeline(createReadStream(destination), split(), new Writable({
+    write (chunk, enc, cb) {
+      count++
+      cb()
+    }
+  }))
+  assert.equal(count, toWrite)
+})