acts as fu named scope.rb

require 'acts_as_fu'

build_model(:people) do
  string :age

  named_scope :minors, :conditions => ['age < ?', 18]
end

test-output.txt

[~] ruby named-scope-fu.rb 
Loaded suite named-scope-fu
Started
..
Finished in 0.009923 seconds.

2 tests, 2 assertions, 0 failures, 0 errors

test.rb

require 'test/unit'

class ActsAsFuNamedScopeTest < Test::Unit::TestCase
  def test_includes_people_under_18
    person = Person.create!(:age => 16)
    assert_equal [person], Person.minors
  end

  def test_does_not_include_people_over_18
    person = Person.create!(:age => 21)
    assert_equal [], Person.minors
  end
end