add support for defining examples using def test_xxx

lib/rspec/core/example_group.rb

@@ -308,6 +308,12 @@ def self.set_ivars(instance, ivars)
         ivars.each {|name, value| instance.instance_variable_set(name, value)}
       end
 
+      def self.method_added(m)
+        if m.to_s =~ /test_(.*)/
+          example($1) { method(m).call }
+        end
+      end
+
       def described_class
         self.class.described_class
       end

spec/rspec/core/example_group_spec.rb

@@ -906,5 +906,19 @@ def foo; 'foo'; end
       end
     end
 
+    describe "a method starting with test_" do
+      it "is generates an an example" do
+        group = ExampleGroup.describe do
+          def test_something_that_fails
+            1.should eq(2)
+          end
+        end
+
+        group.examples.length.should eq(1)
+        group.examples.first.description.should eq('something_that_fails')
+        group.run.should be_false, "expected a failure"
+      end
+    end
+
   end
 end