From b61528e757feb53f5b1d4f05706a55364bd3f265 Mon Sep 17 00:00:00 2001
From: Jack Nagel
Date: Tue, 13 Jan 2015 12:19:56 -0500
Subject: Save and restore ENV around test invocations

This prevents mutations that happen in individual tests from leaking
into other tests.
---
 Library/Homebrew/cmd/test.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'Library')

diff --git a/Library/Homebrew/cmd/test.rb b/Library/Homebrew/cmd/test.rb
index 630450744..139cebfed 100644
--- a/Library/Homebrew/cmd/test.rb
+++ b/Library/Homebrew/cmd/test.rb
@@ -53,6 +53,8 @@ module Homebrew
       f.extend(Homebrew::Assertions)
       f.extend(Debrew::Formula) if ARGV.debug?
 
+      env = ENV.to_hash
+
       begin
         # tests can also return false to indicate failure
         Timeout::timeout TEST_TIMEOUT_SECONDS do
@@ -64,6 +66,8 @@ module Homebrew
       rescue Exception => e
         ofail "#{f.name}: failed"
         puts e, e.backtrace
+      ensure
+        ENV.replace(env)
       end
     end
   end
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