https://git.ruby-lang.org/ruby.git/commit/?id=fcd8bafd08

From fcd8bafd086a7105b535ec1691f960e37d5c911b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 18 Dec 2019 13:35:58 +0900
Subject: Use a temporary file for chown test

Errno::EROFS may occur when the source tree is placed in a
read-only filesystem.

diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 96e2ca2..d570b6f 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -233,11 +233,9 @@ class TestFile < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_file.rb#L233
   end
 
   def test_chown
-    assert_nothing_raised {
-      File.open(__FILE__) {|f| f.chown(-1, -1) }
-    }
-    assert_nothing_raised("[ruby-dev:27140]") {
-      File.open(__FILE__) {|f| f.chown nil, nil }
+    Tempfile.create("test-chown") {|f|
+      assert_nothing_raised {f.chown(-1, -1)}
+      assert_nothing_raised("[ruby-dev:27140]") {f.chown(nil, nil)}
     }
   end
 
-- 
cgit v0.10.2


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