refactoring out resource loading/building logic into separate class

spec/cancan/controller_resource_spec.rb

@@ -0,0 +1,37 @@
+require File.dirname(__FILE__) + '/../spec_helper'
+
+describe CanCan::ControllerResource do
+  before(:each) do
+    @controller = Object.new
+  end
+  
+  it "should determine model class by constantizing give name" do
+    CanCan::ControllerResource.new(@controller, :ability).model_class.should == Ability
+  end
+  
+  it "should fetch model through model class and assign it to the instance" do
+    stub(Ability).find(123) { :some_ability }
+    CanCan::ControllerResource.new(@controller, :ability).find(123)
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+  
+  it "should fetch model through parent and assign it to the instance" do
+    parent = Object.new
+    stub(parent).model_instance.stub!.abilities.stub!.find(123) { :some_ability }
+    CanCan::ControllerResource.new(@controller, :ability, parent).find(123)
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+  
+  it "should build model through model class and assign it to the instance" do
+    stub(Ability).new(123) { :some_ability }
+    CanCan::ControllerResource.new(@controller, :ability).build(123)
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+  
+  it "should build model through parent and assign it to the instance" do
+    parent = Object.new
+    stub(parent).model_instance.stub!.abilities.stub!.build(123) { :some_ability }
+    CanCan::ControllerResource.new(@controller, :ability, parent).build(123)
+    @controller.instance_variable_get(:@ability).should == :some_ability
+  end
+end