adding initial aliases for index, show, new and edit

lib/cancan/ability.rb

@@ -2,6 +2,9 @@ module CanCan
   module Ability
     def self.included(base)
       base.extend ClassMethods
+      base.alias_action :index, :show, :to => :read
+      base.alias_action :new, :to => :create
+      base.alias_action :edit, :to => :update
     end
     
     def can?(original_action, target)

spec/cancan/ability_spec.rb

@@ -18,6 +18,7 @@ describe CanCan::Ability do
   end
   
   it "should return what block returns on a can call" do
+    @ability_class.can :read, :all
     @ability_class.can :read, Symbol do |sym|
       sym
     end
@@ -63,4 +64,17 @@ describe CanCan::Ability do
     @ability.can?(:foo, 123).should == [:foo, Fixnum, 123]
     @ability.can?(:bar, Fixnum).should == [:bar, Fixnum, nil]
   end
+  
+  it "should automatically alias index and show into read calls" do
+    @ability_class.can :read, :all
+    @ability.can?(:index, 123).should be_true
+    @ability.can?(:show, 123).should be_true
+  end
+  
+  it "should automatically alias new and edit into create and update respectively" do
+    @ability_class.can(:create, :all) { :create_called }
+    @ability_class.can(:update, :all) { :update_called }
+    @ability.can?(:new, 123).should == :create_called
+    @ability.can?(:edit, 123).should == :update_called
+  end
 end