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require 'test/unit'
require File.dirname(__FILE__) + '/../../lib/active_support/core_ext/class'
require File.dirname(__FILE__) + '/../../lib/active_support/core_ext/module'
module One
end
class Ab
include One
end
module Xy
class Bc
include One
end
end
module Yz
module Zy
class Cd
include One
end
end
end
class De
end
Somewhere = Struct.new(:street, :city)
Someone = Struct.new(:name, :place) do
delegate :street, :city, :to => :place
delegate :state, :to => :@place
delegate :upcase, :to => "place.city"
end
class Name
delegate :upcase, :to => :@full_name
def initialize(first, last)
@full_name = "#{first} #{last}"
end
end
$nowhere = <<-EOF
class Name
delegate :nowhere
end
EOF
$noplace = <<-EOF
class Name
delegate :noplace, :tos => :hollywood
end
EOF
class ModuleTest < Test::Unit::TestCase
def test_included_in_classes
assert One.included_in_classes.include?(Ab)
assert One.included_in_classes.include?(Xy::Bc)
assert One.included_in_classes.include?(Yz::Zy::Cd)
assert !One.included_in_classes.include?(De)
end
def test_delegation_to_methods
david = Someone.new("David", Somewhere.new("Paulina", "Chicago"))
assert_equal "Paulina", david.street
assert_equal "Chicago", david.city
end
def test_delegation_down_hierarchy
david = Someone.new("David", Somewhere.new("Paulina", "Chicago"))
assert_equal "CHICAGO", david.upcase
end
def test_delegation_to_instance_variable
david = Name.new("David", "Hansson")
assert_equal "DAVID HANSSON", david.upcase
end
def test_missing_delegation_target
assert_raises(ArgumentError) { eval($nowhere) }
assert_raises(ArgumentError) { eval($noplace) }
end
end
|
