From 966078f5604433a63d9b8a442a1bc44f96ffb9f6 Mon Sep 17 00:00:00 2001
From: Stefanos Togkoulidis <stefanostogoulidis@gmail.com>
Date: Fri, 16 Mar 2018 11:28:39 +0200
Subject: [PATCH] Add instructions for attaching debugger to jest

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index c3b73dd41f774..f438ac591aaa7 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,15 @@ yarn start -- --reset-cache
 
 Runs the [jest](https://github.com/facebook/jest) test runner on your tests.
 
+To run `jest` with debugger support, start it with the following CLI command:
+```
+NODE_ENV=test node --inspect-brk node_modules/.bin/jest --runInBand
+```
+
+Append `--config <jest config json file>` to specify a config file other than the default.
+
+Then, open `chrome://inspect` in Chrome to attach the debugger (look into the "Remote Target" section). While testing/developing, feel free to springle `debugger` statements anywhere in the code that you'd like the debugger to break.
+
 #### `npm run ios`
 
 Like `npm start`, but also attempts to open your app in the iOS Simulator if you're on a Mac and have it installed.