before(:each) do
  @category = mock_model(Category)
  controller.stub!(:authenticate).and_return(true)
  @category.stub!(:new_record?).and_return(false)
  @category.stub!(:new).and_return(@category)
  Category.stub!(:find).and_return(@category)
  @category.stub!(:destroy).and_return(true)
end