Added Config#configure

lib/pickle/config.rb

@@ -5,10 +5,16 @@ class Config
     attr_writer :adapters, :factories, :mappings
 
     # default configuration object
-    def self.default
-      returning(@default ||= new) do |config|
-        yield(config) if block_given?
-      end
+    def self.default(&block)
+      returning(@default ||= new) {|config| config.configure(&block) if block_given?}
+    end
+
+    def initialize(&block)
+      configure(&block) if block_given?
+    end
+
+    def configure(&block)
+      yield(self)
     end
 
     def adapters

spec/lib/pickle_config_spec.rb

@@ -73,11 +73,18 @@ class SomeAdapter; end
       @config.map 'foo', 'bar', :to => 'faz'
     end
 
-    it "should create {:search => '(?:foo|bar)', :replace => 'faz'} mapping" do
+    it "should create OpenStruct(search: '(?:foo|bar)', replace: 'faz') mapping" do
       @config.mappings.first.should == OpenStruct.new(:search => '(?:foo|bar)', :replace => 'faz')
     end
   end
-
+
+  it "#configure(&block) should execiute on self" do
+    @config.should_receive(:foo).with(:bar)
+    @config.configure do |c|
+      c.foo :bar
+    end
+  end
+
   describe ".default (class method)" do
     it "should refer to same object" do
       Pickle::Config.default.should == Pickle::Config.default