skip write_timeout test on Windows

This test is about write_timeout.
To ensure it really raised Net::WriteTimeout, skip this test on Windows,
whose write returns immediately even for large data.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63598 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/net/http/test_http.rb

@@ -530,7 +530,7 @@ module TestNetHTTP_version_1_1_methods
   end
 
   def test_timeout_during_HTTP_session_write
-    bug4246 = "expected the HTTP session to have timed out but have not. c.f. [ruby-core:34203]"
+    skip "write returns immediately on Windows" if windows?
 
     th = nil
     # listen for connections... but deliberately do not read
@@ -538,15 +538,15 @@ module TestNetHTTP_version_1_1_methods
       port = server.addr[1]
 
       conn = Net::HTTP.new('localhost', port)
-      conn.read_timeout = conn.write_timeout = 0.01
+      conn.write_timeout = 0.01
       conn.open_timeout = 0.1
 
       th = Thread.new do
-        assert_raise(Net::WriteTimeout, Net::ReadTimeout) {
-          conn.post('/', "a"*50_000_000)
+        assert_raise(Net::WriteTimeout) {
+          conn.post('/', "a"*5_000_000)
         }
       end
-      assert th.join(10), bug4246
+      assert th.join(10)
     }
   ensure
     th.kill