Use metadata/filtering to filter out Ruby-version dependent examples.

lib/rspec/core/configuration.rb

@@ -2,10 +2,10 @@ module Rspec
   module Core
     class Configuration
       # Control what examples are run by filtering 
-      attr_reader :filter
+      attr_accessor :filter
 
       # Control what examples are not run by filtering 
-      attr_reader :exclusion_filter
+      attr_accessor :exclusion_filter
 
       # Run all examples if the run is filtered, and no examples were found.
       attr_writer :run_all_when_everything_filtered

spec/rspec/core/example_group_spec.rb

@@ -300,13 +300,12 @@ def stub_example_group
         @before_all_top_level.should == 'before_all_top_level'
       end
 
-      it "should be able to access the before all ivars in the before_all_ivars hash" do
-        with_ruby('1.8') do
-          running_example.example_group.before_all_ivars.should include('@before_all_top_level' => 'before_all_top_level')
-        end
-        with_ruby('1.9') do
-          running_example.example_group.before_all_ivars.should include(:@before_all_top_level => 'before_all_top_level')
-        end
+      it "should be able to access the before all ivars in the before_all_ivars hash", :ruby => 1.8 do
+        running_example.example_group.before_all_ivars.should include('@before_all_top_level' => 'before_all_top_level')
+      end
+
+      it "should be able to access the before all ivars in the before_all_ivars hash", :ruby => 1.9 do
+        running_example.example_group.before_all_ivars.should include(:@before_all_top_level => 'before_all_top_level')
       end
 
       describe "but now I am nested" do

spec/rspec/core/shared_example_group_spec.rb

@@ -41,22 +41,28 @@ def cleanup_shared_example_groups
         Rspec::Core.world.shared_example_groups.replace(original_shared_example_groups)
       end
 
-      it "should make any shared example_group available at the correct level" do
+      it "should make any shared example_group available at the correct level", :ruby => 1.8 do
         group = ExampleGroup.create('fake group')
         block = lambda {
           def self.class_helper; end
           def extra_helper; end
         }
         Rspec::Core.world.stub(:shared_example_groups).and_return({ :shared_example_group => block })
         group.it_should_behave_like :shared_example_group
-        with_ruby(1.8) do
-          group.instance_methods.should include('extra_helper')
-          group.singleton_methods.should include('class_helper')
-        end
-        with_ruby(1.9) do
-          group.instance_methods.should include(:extra_helper)
-          group.singleton_methods.should include(:class_helper)
-        end
+        group.instance_methods.should  include('extra_helper')
+        group.singleton_methods.should include('class_helper')
+      end
+
+      it "should make any shared example_group available at the correct level", :ruby => 1.9 do
+        group = ExampleGroup.create('fake group')
+        block = lambda {
+          def self.class_helper; end
+          def extra_helper; end
+        }
+        Rspec::Core.world.stub(:shared_example_groups).and_return({ :shared_example_group => block })
+        group.it_should_behave_like :shared_example_group
+        group.instance_methods.should include(:extra_helper)
+        group.singleton_methods.should include(:class_helper)
       end
 
       it "should raise when named shared example_group can not be found" 

spec/spec_helper.rb

@@ -8,10 +8,6 @@
 
 Rspec::Core::ExampleGroup.send(:include, Rspec::Matchers)
 
-def with_ruby(version)
-  yield if RUBY_VERSION.to_s =~ Regexp.compile("^#{version}")
-end
-
 module Rspec
   module Core
     module Matchers
@@ -40,7 +36,8 @@ def in_editor?
 
 Rspec.configure do |c|
   c.mock_framework = :rspec
-  c.filter_run :focused => true
-  c.run_all_when_everything_filtered = true
   c.color_enabled = !in_editor?
+  c.exclusion_filter = { :ruby => lambda {|version|
+    !(RUBY_VERSION.to_s =~ /^#{version.to_s}/)
+  }}
 end