From d89ec001220af03a204986c53de79a28a59e4b20 Mon Sep 17 00:00:00 2001
From: Andrey Lushnikov <aslushnikov@gmail.com>
Date: Thu, 31 Jan 2019 17:30:34 -0800
Subject: [PATCH] fix(ppfox): check directory existance if necessary when
 running tests (#3871)

---
 experimental/puppeteer-firefox/misc/install-preferences.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/experimental/puppeteer-firefox/misc/install-preferences.js b/experimental/puppeteer-firefox/misc/install-preferences.js
index b00f574400e..f664bfe10ba 100644
--- a/experimental/puppeteer-firefox/misc/install-preferences.js
+++ b/experimental/puppeteer-firefox/misc/install-preferences.js
@@ -16,8 +16,10 @@ async function installFirefoxPreferences(executablePath) {
     prefPath = path.join(firefoxFolder, '..', 'Resources', 'defaults', 'pref');
     configPath = path.join(firefoxFolder, '..', 'Resources');
   } else if (os.platform() === 'linux') {
-    await mkdirAsync(path.join(firefoxFolder, 'browser', 'defaults'));
-    await mkdirAsync(path.join(firefoxFolder, 'browser', 'defaults', 'preferences'));
+    if (!fs.existsSync(path.join(firefoxFolder, 'browser', 'defaults')))
+      await mkdirAsync(path.join(firefoxFolder, 'browser', 'defaults'));
+    if (!fs.existsSync(path.join(firefoxFolder, 'browser', 'defaults', 'preferences')))
+      await mkdirAsync(path.join(firefoxFolder, 'browser', 'defaults', 'preferences'));
     prefPath = path.join(firefoxFolder, 'browser', 'defaults', 'preferences');
     configPath = firefoxFolder;
   } else if (os.platform() === 'win32') {