From 0f79b065bcee2581d0e7f80bdceb3e4f7d0c4674 Mon Sep 17 00:00:00 2001
From: Emilien Muraton <emilien.muraton@gmail.com>
Date: Fri, 24 Aug 2018 15:07:57 +0100
Subject: [PATCH] fix: callback early is readdir throw an error

---
 .../jest-haste-map/src/crawlers/__tests__/node.test.js    | 8 ++++----
 packages/jest-haste-map/src/crawlers/node.js              | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/packages/jest-haste-map/src/crawlers/__tests__/node.test.js b/packages/jest-haste-map/src/crawlers/__tests__/node.test.js
index 7734a04b143e..599075bb3269 100644
--- a/packages/jest-haste-map/src/crawlers/__tests__/node.test.js
+++ b/packages/jest-haste-map/src/crawlers/__tests__/node.test.js
@@ -59,8 +59,8 @@ jest.mock('fs', () => {
         setTimeout(() => callback(null, ['directory', 'tomato.js']), 0);
       } else if (dir === '/fruits/directory') {
         setTimeout(() => callback(null, ['strawberry.js']), 0);
-      } else if (dir == '/empty') {
-        setTimeout(() => callback(null, null), 0);
+      } else if (dir == '/error') {
+        setTimeout(() => callback({code: 'ENOTDIR'}, undefined), 0);
       }
     }),
     stat: jest.fn(stat),
@@ -220,7 +220,7 @@ describe('node crawler', () => {
     });
   });
 
-  it('completes with undefined names', () => {
+  it('completes with fs.readdir throwing an error', () => {
     process.platform = 'win32';
 
     nodeCrawl = require('../node');
@@ -230,7 +230,7 @@ describe('node crawler', () => {
       data: {files},
       extensions: ['js'],
       ignore: pearMatcher,
-      roots: ['/empty'],
+      roots: ['/error'],
     }).then(data => {
       expect(data.files).toEqual({});
     });
diff --git a/packages/jest-haste-map/src/crawlers/node.js b/packages/jest-haste-map/src/crawlers/node.js
index 004dd46f23a1..96ce13d6e076 100644
--- a/packages/jest-haste-map/src/crawlers/node.js
+++ b/packages/jest-haste-map/src/crawlers/node.js
@@ -30,7 +30,7 @@ function find(
     activeCalls++;
     fs.readdir(directory, (err, names) => {
       activeCalls--;
-      if (!names) {
+      if (err) {
         callback(result);
         return;
       }