pathname.rb: UNC root pathname needs a separator

* ext/pathname/lib/pathname.rb (Pathname#plus): UNC root pathname
  needs a separator.  File.basename returns "/" on UNC root, as
  well as sole drive letter, even if it does not end with a
  separator.  [ruby-core:80900] [Bug #13515]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59102 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 2 deletions

diff --git a/test/pathname/test_pathname.rb b/test/pathname/test_pathname.rb
index 848d4e4190..1efd40121d 100644
--- a/test/pathname/test_pathname.rb
+++ b/test/pathname/test_pathname.rb
@@ -14,8 +14,8 @@ class TestPathname < Test::Unit::TestCase
   end
 
   def self.get_linenum
-    if /:(\d+):/ =~ caller[1]
-      $1.to_i
+    if loc = caller_locations(2, 1)
+      loc[0].lineno
     else
       nil
     end
@@ -221,6 +221,8 @@ class TestPathname < Test::Unit::TestCase
 
   defassert(:plus, 'a//b/d//e', 'a//b/c', '../d//e')
 
+  defassert(:plus, '//foo/var/bar', '//foo/var', 'bar')
+
   def test_slash
     assert_kind_of(Pathname, Pathname("a") / Pathname("b"))
   end