Add test for handling captured output encodings in junit

spec/cucumber/formatter/junit_spec.rb

@@ -61,6 +61,38 @@ def after_step(step)
           it { expect(@doc.xpath('//testsuite/testcase/system-out').first.content).to match(/\s+boo boo\s+/) }
         end
 
+        describe 'is able to handle multiple encoding in pipe' do
+          before(:each) do
+            run_defined_feature
+            @doc = Nokogiri.XML(@formatter.written_files.values.first)
+          end
+          define_feature "
+              Feature: One passing scenario, one failing scenario
+
+                Scenario: Passing
+                  Given a passing ctrl scenario
+            "
+          class Junit
+            def before_step(step)
+              return unless step.text.match('a passing ctrl scenario')
+              Interceptor::Pipe.unwrap! :stdout
+              @fake_io = $stdout = StringIO.new
+              $stdout.sync = true
+              @interceptedout = Interceptor::Pipe.wrap(:stdout)
+            end
+
+            def after_step(step)
+              return unless step.text.match('a passing ctrl scenario')
+              @interceptedout.write("encoding ")
+              @interceptedout.write("pickle".encode("UTF-16"))
+              $stdout = STDOUT
+              @fake_io.close
+            end
+          end
+
+          it { expect(@doc.xpath('//testsuite/testcase/system-out').first.content).to match(/\s+encoding pickle\s+/) }
+        end
+
         describe 'a feature with no name' do
           define_feature <<-FEATURE
             Feature: