Example of overriding a method on a Class that is looked up dynamically from an instance

overridden_class_method.rb

class Foo
  class << self
    def bar
      "Foo.bar"
    end
  end

  def bar
    self.class.bar
  end
end

class Baz < Foo
  class << self
    def bar
      "Baz.bar"
    end
  end
end

describe "An object using a class method" do
  subject { Foo.new }
  its(:bar) { should eq "Foo.bar" }
end

describe "A subclass object using a class method" do
  subject { Baz.new }
  its(:bar) { should eq "Baz.bar" }
end