implicit_super.rb

require 'rubygems'

require 'rspec'

class Base
  def static1; :static1; end
  def static2; :static2; end
  define_method :dynamic1 do :dynamic1; end
  define_method :dynamic2 do :dynamic2; end
end

class Sub < Base
  def static1; super; end
  define_method :static2 do super; end
  def dynamic1; super; end
  define_method :dynamic2 do super; end
end

describe Sub do
  its(:static1) { should == :static1 }
  its(:static2) { should == :static2 }
  its(:dynamic1) { should == :dynamic1 }
  its(:dynamic2) { should == :dynamic2 }
end

ouptput

ruby-1.9.2-rc2 ➜  ruby implicit_super.rb
.F.F

Finished in 0.006 seconds
4 examples, 2 failures

1) Sub static2 
    Failure/Error: Unable to find matching line from backtrace
    implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.
    # rspec_example.rb:14:in `block in <class:Sub>'
    # rspec_example.rb:21:in `block (2 levels) in <main>'

2) Sub dynamic2 
    Failure/Error: Unable to find matching line from backtrace
    implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.
    # rspec_example.rb:16:in `block in <class:Sub>'
    # rspec_example.rb:23:in `block (2 levels) in <main>'