huginn/spec/concerns/inheritance_tracking_spec.rb

require 'spec_helper'
require 'inheritance_tracking'

describe InheritanceTracking do
  class Class1
    include InheritanceTracking
  end

  class Class2 < Class1; end
  class Class3 < Class1; end

  it "tracks subclasses" do
    Class1.subclasses.should == [Class2, Class3]
  end

  it "can be temporarily overridden with #with_subclasses" do
    Class1.with_subclasses(Class2) do
      Class1.subclasses.should == [Class2]
    end
  end
end