test: fix test conditions

* test/csv/test_features.rb (TestCSV#test_gzip_reader_bug_fix): test
  only if zlib is available.

* test/csv/test_features.rb (TestCSV#test_gzip_writer_bug_fix): ditto.

* test/open-uri/test_open-uri.rb (TestOpenURI#test_content_encoding):
  ditto.

* test/rexml/test_order.rb (OrderTester#test_more_ordering): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35592 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 2 deletions

diff --git a/test/open-uri/test_open-uri.rb b/test/open-uri/test_open-uri.rb
index 0cae2d56fd..2b0cfc622f 100644
--- a/test/open-uri/test_open-uri.rb
+++ b/test/open-uri/test_open-uri.rb
@@ -2,7 +2,10 @@ require 'test/unit'
 require 'open-uri'
 require 'webrick'
 require 'webrick/httpproxy'
-require 'zlib'
+begin
+  require 'zlib'
+rescue LoadError
+end
 
 class TestOpenURI < Test::Unit::TestCase
 
@@ -497,7 +500,7 @@ class TestOpenURI < Test::Unit::TestCase
         assert_equal(content_gz, f.read.force_encoding("ascii-8bit"))
       }
     }
-  end
+  end if defined?(Zlib::GzipWriter)
 
   # 192.0.2.0/24 is TEST-NET.  [RFC3330]