adding a test for the runner module [#6027 state:resolved]

actionpack/test/controller/runner_test.rb

+require 'abstract_unit'
+require 'action_dispatch/testing/integration'
+
+module ActionDispatch
+  class RunnerTest < Test::Unit::TestCase
+    class MyRunner
+      include Integration::Runner
+
+      def initialize(session)
+        @integration_session = session
+      end
+
+      def hi; end
+    end
+
+    def test_respond_to?
+      runner = MyRunner.new(Class.new { def x; end }.new)
+      assert runner.respond_to?(:hi)
+      assert runner.respond_to?(:x)
+    end
+  end
+end