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require 'spec_helper'
describe "default values" do
before do
module Examples
class Reference
include Virtus::ValueObject
attribute :ref, String
end
class Page
include Virtus
attribute :title, String
attribute :slug, String, :default => lambda { |post, attribute| post.title.downcase.gsub(' ', '-') }
attribute :view_count, Integer, :default => 0
attribute :published, Boolean, :default => false, :accessor => :private
attribute :editor_title, String, :default => :default_editor_title
attribute :reference, String, :default => Reference.new
attribute :revisions, Array
attribute :index, Hash
attribute :authors, Set
def default_editor_title
published? ? title : "UNPUBLISHED: #{title}"
end
end
end
end
subject { Examples::Page.new }
specify 'without a default the value is nil' do
subject.title.should be_nil
end
specify 'can be supplied with the :default option' do
subject.view_count.should == 0
end
specify "you can pass a 'callable-object' to the :default option" do
subject.title = 'Example Blog Post'
subject.slug.should == 'example-blog-post'
end
specify 'you can set defaults for private attributes' do
subject.title = 'Top Secret'
subject.editor_title.should == 'UNPUBLISHED: Top Secret'
end
context 'a ValueObject' do
it 'does not duplicate the ValueObject' do
page1 = Examples::Page.new
page2 = Examples::Page.new
page1.reference.should equal(page2.reference)
end
end
context 'an Array' do
specify 'without a default the value is an empty Array' do
subject.revisions.should eql([])
end
end
context 'a Hash' do
specify 'without a default the value is an empty Hash' do
subject.index.should eql({})
end
end
context 'a Set' do
specify 'without a default the value is an empty Set' do
subject.authors.should eql(Set.new)
end
end
end
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