[ruby/zlib] Fix the test broken in older versions

https://github.com/ruby/zlib/commit/fc89ff9ef0
2023-01-09 18:53:00 +09:00 · 2023-01-09 18:53:00 +09:00 · 9d078fe477
commit 9d078fe477
parent f6952a94eb
1 changed files with 9 additions and 3 deletions
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@ -804,10 +804,16 @@ if defined? Zlib
          io.rewind

          gz0 = Zlib::GzipWriter.new(io)
-          assert_nil gz0.path
-
          gz1 = Zlib::GzipReader.new(io)
-          assert_nil gz1.path
+
+          if IO.method_defined?(:path)
+            assert_nil gz0.path
+            assert_nil gz1.path
+          else
+            assert_raise(NoMethodError) { gz0.path }
+            assert_raise(NoMethodError) { gz1.path }
+          end
+
          gz0.close
          gz1.close
        end