https://git.ruby-lang.org/ruby.git/commit/?id=0d227d1ce6

From 0d227d1ce6aa01b0f6db06bbbf828acb962d4734 Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@g...>
Date: Sat, 27 Apr 2019 19:42:54 +0200
Subject: Try to more accurately reflect MRI's logic in specs for finding the
 home if $HOME is unset


diff --git a/spec/ruby/core/file/expand_path_spec.rb b/spec/ruby/core/file/expand_path_spec.rb
index c2899fe..5bb60d2 100644
--- a/spec/ruby/core/file/expand_path_spec.rb
+++ b/spec/ruby/core/file/expand_path_spec.rb
@@ -223,7 +223,16 @@ platform_is_not :windows do https://github.com/ruby/ruby/blob/trunk/spec/ruby/core/file/expand_path_spec.rb#L223
       ENV["HOME"] = @home
     end
 
-    guard -> { Etc.getlogin } do
+    guard -> {
+      # We need to check if getlogin(3) returns non-NULL,
+      # as MRI only checks getlogin(3) for expanding '~' if $HOME is not set.
+      user = ENV.delete("USER")
+      begin
+        Etc.getlogin != nil
+      ensure
+        ENV["USER"] = user
+      end
+    } do
       it "uses the user database when passed '~' if HOME is nil" do
         ENV.delete "HOME"
         File.directory?(File.expand_path("~")).should == true
-- 
cgit v0.10.2


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