From 4adb2d655dcd54b28366b4d17e86b21e2b622cd1 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 25 Mar 2020 22:00:15 +0900
Subject: Make RbConfig::CONFIG values mutable [Bug #16738]

As `RbConfig.expand` modifies the argument and involved `CONFIG`
values, its values should be mutable.
---
 test/test_rbconfig.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'test/test_rbconfig.rb')

diff --git a/test/test_rbconfig.rb b/test/test_rbconfig.rb
index 1bbf01b9a6..fcbbbd8500 100644
--- a/test/test_rbconfig.rb
+++ b/test/test_rbconfig.rb
@@ -51,4 +51,13 @@ class TestRbConfig < Test::Unit::TestCase
       assert_match(/\$\(sitearch|\$\(rubysitearchprefix\)/, val, "#{key} #{bug7823}")
     end
   end
+
+  if /darwin/ =~ RUBY_PLATFORM
+    def test_sdkroot
+      assert_separately([{"SDKROOT" => "$(prefix)/SDKRoot"}], "#{<<~"begin;"}\n#{<<~'end;'}")
+      begin;
+        assert_equal RbConfig::CONFIG["prefix"]+"/SDKRoot", RbConfig::CONFIG["SDKROOT"]
+      end;
+    end
+  end
 end
-- 
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