[ruby/uri] Make URI::regexp schemes case sensitive

(ruby/uri#38)

ruby/uri@0c2b6468fa

Author: nobu

lib/uri/rfc2396_parser.rb

@@ -263,7 +263,7 @@ def make_regexp(schemes = nil)
       unless schemes
         @regexp[:ABS_URI_REF]
       else
-        /(?=#{Regexp.union(*schemes)}:)#{@pattern[:X_ABS_URI]}/x
+        /(?=(?i:#{Regexp.union(*schemes).source}):)#{@pattern[:X_ABS_URI]}/x
       end
     end
 

test/uri/test_parser.rb

@@ -113,4 +113,12 @@ def test_rfc3986_port_check
       end
     end
   end
+
+  def test_rfc2822_make_regexp
+    parser = URI::RFC2396_Parser.new
+    regexp = parser.make_regexp("HTTP")
+    assert_match(regexp, "HTTP://EXAMPLE.COM/")
+    assert_match(regexp, "http://example.com/")
+    refute_match(regexp, "https://example.com/")
+  end
 end