title: FactoryGirl built My::Class object doesn't return true on is_a?(My::Class)
body: <p>Code is better than words here</p>
  
  <pre><code>e = FactoryGirl.build(:company_employee)
  e.class                    # =&gt; Company::Employee
  e.is_a?(Company::Employee) # =&gt; false
  </code></pre>
  
  <p>Is that a bug ? (note that is returns true if I do it with simpleer models like user). Could the bug come from the namespace addition ?</p>
  
  <p>Classes</p>
  
  <pre><code># factories/company_employee.rb
  FactoryGirl.define do
    factory :company_employee, class: Company::Employee do
      ...
    end
  end
  
  # models/company/employee.rb
  class Company::Employee &lt; Professional
    ...
  end
  </code></pre>