add tests for El Capitan failure

http://rubyci.s3.amazonaws.com/osx1011/ruby-trunk/log/20151209T174501Z.fail.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53013 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 0 deletions

diff --git a/test/net/http/test_http.rb b/test/net/http/test_http.rb
index 052c3ef558..7d960a7ada 100644
--- a/test/net/http/test_http.rb
+++ b/test/net/http/test_http.rb
@@ -96,6 +96,17 @@ class TestNetHTTP < Test::Unit::TestCase
     end
   end
 
+  def test_proxy_from_env_ENV
+    clean_http_proxy_env do
+      ENV['http_proxy'] = 'http://proxy.example:8000'
+
+      assert_equal false, Net::HTTP.proxy_class?
+      http = Net::HTTP.new 'example'
+
+      assert_equal true, http.proxy_from_env?
+    end
+  end
+
   def test_proxy_address_ENV
     clean_http_proxy_env do
       ENV['http_proxy'] = 'http://proxy.example:8000'