Correct implementation of Cucumber::Formatter::Interceptor::Pipe#resp…

…ond_to?. Fixes #312

History.md

@@ -13,7 +13,7 @@
 * Improve rake task report on failure ([#400](https://github.com/cucumber/cucumber/issues/400) Andrey Vakarev
 * Show details of nested steps in backtraces
   ([#69](https://github.com/cucumber/cucumber/issues/69)) Steve Tooke
-* Filter out control characters from CDATA section of JUnit formatter output. 
+* Filter out control characters from CDATA section of JUnit formatter output.
   ([#383](https://github.com/cucumber/cucumber/issues/383) @teacup-on-rockingchair)
 * Fix problem with non-ascii characters in file path
   ([#150](https://github.com/cucumber/cucumber/issues/150) Oleg Sukhodolsky)
@@ -29,6 +29,8 @@
   ([#337](https://github.com/cucumber/cucumber/issues/337) Oleg Sukhodolsky)
 * Allow duplication for format+output pair in command line
   ([#434](https://github.com/cucumber/cucumber/issues/434) David Lantos)
+* Better delegation to IO in Cucumber::Formatter::Interceptor::Pipe
+  ([#312](https://github.com/cucumber/cucumber/issues/312) Oleg Sukhodolsky)
 
 ## [1.2.5](https://github.com/cucumber/cucumber/compare/v1.2.3...v1.2.5)
 

lib/cucumber/formatter/interceptor.rb

@@ -24,6 +24,10 @@ def method_missing(method, *args, &blk)
           @pipe.send(method, *args, &blk)
         end
 
+        def respond_to?(method, include_private=false)
+          super || @pipe.respond_to?(method, include_private)
+        end
+
         def self.validate_pipe(pipe)
           unless [:stdout, :stderr].include? pipe
             raise ArgumentError, '#wrap only accepts :stderr or :stdout'

spec/cucumber/formatter/interceptor_spec.rb

@@ -117,5 +117,13 @@ module Cucumber::Formatter
         pi.tty?.should be true
       end
     end
+
+    describe '#respond_to' do
+      let(:pi) { Interceptor::Pipe.wrap(:stderr) }
+
+      it 'should respond to all methods $stderr has' do
+        $stderr.methods.each { |m| pi.respond_to?(m).should be true }
+      end
+    end
   end
 end