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backend/node_modules/pino-pretty/lib/utils/build-safe-sonic-boom.test.js

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+'use strict'
+
+const tap = require('tap')
+const rimraf = require('rimraf')
+const fs = require('fs')
+const { join } = require('path')
+
+const buildSafeSonicBoom = require('./build-safe-sonic-boom')
+
+function noop () {}
+
+const file = () => {
+  const dest = join(__dirname, `${process.pid}-${process.hrtime().toString()}`)
+  const fd = fs.openSync(dest, 'w')
+  return { dest, fd }
+}
+
+tap.test('should not write when error emitted and code is "EPIPE"', async t => {
+  t.plan(1)
+
+  const { fd, dest } = file()
+  const stream = buildSafeSonicBoom({ sync: true, fd, mkdir: true })
+  t.teardown(() => rimraf(dest, noop))
+
+  stream.emit('error', { code: 'EPIPE' })
+  stream.write('will not work')
+
+  const dataFile = fs.readFileSync(dest)
+  t.equal(dataFile.length, 0)
+})
+
+tap.test('should stream.write works when error code is not "EPIPE"', async t => {
+  t.plan(3)
+  const { fd, dest } = file()
+  const stream = buildSafeSonicBoom({ sync: true, fd, mkdir: true })
+
+  t.teardown(() => rimraf(dest, noop))
+
+  stream.on('error', () => t.pass('error emitted'))
+
+  stream.emit('error', 'fake error description')
+
+  t.ok(stream.write('will work'))
+
+  const dataFile = fs.readFileSync(dest)
+  t.equal(dataFile.toString(), 'will work')
+})
+
+tap.test('cover setupOnExit', async t => {
+  t.plan(3)
+  const { fd, dest } = file()
+  const stream = buildSafeSonicBoom({ sync: false, fd, mkdir: true })
+
+  t.teardown(() => rimraf(dest, noop))
+
+  stream.on('error', () => t.pass('error emitted'))
+  stream.emit('error', 'fake error description')
+
+  t.ok(stream.write('will work'))
+
+  await watchFileCreated(dest)
+
+  const dataFile = fs.readFileSync(dest)
+  t.equal(dataFile.toString(), 'will work')
+})
+
+function watchFileCreated (filename) {
+  return new Promise((resolve, reject) => {
+    const TIMEOUT = 2000
+    const INTERVAL = 100
+    const threshold = TIMEOUT / INTERVAL
+    let counter = 0
+    const interval = setInterval(() => {
+      // On some CI runs file is created but not filled
+      if (fs.existsSync(filename) && fs.statSync(filename).size !== 0) {
+        clearInterval(interval)
+        resolve()
+      } else if (counter <= threshold) {
+        counter++
+      } else {
+        clearInterval(interval)
+        reject(new Error(`${filename} was not created.`))
+      }
+    }, INTERVAL)
+  })
+}