Improve syncfalse test (#1253)

Author: mcollina

test/transport/syncfalse.test.js

@@ -1,14 +1,34 @@
 'use strict'
 
+const os = require('os')
 const pino = require('../..')
 const { join } = require('path')
 const { test } = require('tap')
+const { readFile } = require('fs').promises
+const { watchFileCreated } = require('../helper')
 
-test('thread-stream async flush', async () => {
+const { pid } = process
+const hostname = os.hostname()
+
+test('thread-stream async flush', async ({ same }) => {
+  const destination = join(
+    os.tmpdir(),
+    '_' + Math.random().toString(36).substr(2, 9)
+  )
   const transport = pino.transport({
-    target: join(__dirname, '..', 'fixtures', 'console-transport.js')
+    target: join(__dirname, '..', 'fixtures', 'to-file-transport.js'),
+    options: { destination }
   })
   const instance = pino(transport)
   instance.info('hello')
   instance.flush()
+  await watchFileCreated(destination)
+  const result = JSON.parse(await readFile(destination))
+  delete result.time
+  same(result, {
+    pid,
+    hostname,
+    level: 30,
+    msg: 'hello'
+  })
 })