virtus_enforce_coercions.rb

require 'virtus'

class Foo
  include Virtus

  attribute :id, Integer
  attribute :date, Date
  attribute :foo, String

  def initialize(attributes = {})
    super(attributes)
    enforce_coercions!
  end

  def enforce_coercions!
    self.attributes.each do |name, value|
      unless self.class.attribute_set[name].value_coerced? value
        self[name] = nil
      end
    end
  end

end



describe Foo do
  subject { foo }

  context 'with regularly coercable strings' do
    let(:foo) { Foo.new(id: '1', date: '2012-10-10', foo: 'bar') }

    its(:id) { should == 1 }
    its(:date) { should == Date.new(2012, 10, 10) }
    its(:foo) { should == 'bar' }
  end

  context 'with some empty strings' do
    let(:foo) { Foo.new(id: '', date: '', foo: '') }

    its(:id) { should be_nil }
    its(:date) { should be_nil }
    its(:foo) { should == '' }
  end


  context 'with some empty strings' do
    let(:foo) { Foo.new(id: '', date: '', foo: 'bar') }

    its(:id) { should be_nil }
    its(:date) { should be_nil }
    its(:foo) { should == 'bar' }
  end

end