fix: catch ENOENT (#200)

Author: Kikobeats

src/index.js

@@ -5,13 +5,14 @@ const $ = require('tinyspawn')
 
 const constants = require('./constants')
 
-const args = (flags = {}) =>
-  dargs(flags, { useEquals: false }).filter(Boolean)
+const args = (flags = {}) => dargs(flags, { useEquals: false }).filter(Boolean)
 
 const isJSON = (str = '') => str.startsWith('{')
 
 const parse = ({ stdout, stderr, ...details }) => {
-  if (stdout !== '' && stdout !== 'null') return isJSON(stdout) ? JSON.parse(stdout) : stdout
+  if (stdout !== undefined && stdout !== '' && stdout !== 'null') {
+    return isJSON(stdout) ? JSON.parse(stdout) : stdout
+  }
   throw Object.assign(new Error(stderr), { stderr, stdout }, details)
 }
 

test/error.js

@@ -1,9 +1,21 @@
 'use strict'
 
+const { rename } = require('fs/promises')
+const path = require('path')
 const test = require('ava')
 
 const youtubedl = require('..')
 
+test.serial('catch errors', async t => {
+  await rename(path.resolve('bin/yt-dlp'), path.resolve('bin/_yt-dlp'))
+  t.teardown(() =>
+    rename(path.resolve('bin/_yt-dlp'), path.resolve('bin/yt-dlp'))
+  )
+  const error = await t.throwsAsync(youtubedl(''), { instanceOf: Error })
+  t.is(error.errno, -2)
+  t.is(error.code, 'ENOENT')
+})
+
 test('no url', async t => {
   const error = await t.throwsAsync(youtubedl(''), { instanceOf: Error })
   t.is(error.exitCode, 2)