From 291a497bc41b11c80401b1388956aa7ea1d9c347 Mon Sep 17 00:00:00 2001
From: David Aurelio <davidaurelio@fb.com>
Date: Tue, 25 Apr 2017 03:49:50 -0700
Subject: [PATCH] make test independent from side effects

Reviewed By: jeanlauliac

Differential Revision: D4939025

fbshipit-source-id: cc7f811484cba0db4df394edef294cabe7343c8b
---
 .../src/Bundler/__tests__/Bundler-test.js     | 28 +++++++++++++------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/packager/src/Bundler/__tests__/Bundler-test.js b/packager/src/Bundler/__tests__/Bundler-test.js
index dd13c5ea939e54..9735ed3f502f2f 100644
--- a/packager/src/Bundler/__tests__/Bundler-test.js
+++ b/packager/src/Bundler/__tests__/Bundler-test.js
@@ -359,15 +359,25 @@ describe('Bundler', function() {
         ]));
     });
 
-    it('return correct number of workers', () => {
-      os.cpus.mockReturnValue({length: 1});
-      expect(Bundler.getMaxWorkerCount()).toBe(1);
-      os.cpus.mockReturnValue({length: 8});
-      expect(Bundler.getMaxWorkerCount()).toBe(6);
-      os.cpus.mockReturnValue({length: 24});
-      expect(Bundler.getMaxWorkerCount()).toBe(14);
-      process.env.REACT_NATIVE_MAX_WORKERS = 5;
-      expect(Bundler.getMaxWorkerCount()).toBe(5);
+    describe('number of workers', () => {
+      beforeEach(() => {
+        delete process.env.REACT_NATIVE_MAX_WORKERS;
+      });
+
+      afterEach(() => {
+        delete process.env.REACT_NATIVE_MAX_WORKERS;
+      });
+
+      it('return correct number of workers', () => {
+        os.cpus.mockReturnValue({length: 1});
+        expect(Bundler.getMaxWorkerCount()).toBe(1);
+        os.cpus.mockReturnValue({length: 8});
+        expect(Bundler.getMaxWorkerCount()).toBe(6);
+        os.cpus.mockReturnValue({length: 24});
+        expect(Bundler.getMaxWorkerCount()).toBe(14);
+        process.env.REACT_NATIVE_MAX_WORKERS = 5;
+        expect(Bundler.getMaxWorkerCount()).toBe(5);
+      });
     });
   });
 });