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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
def test_parent
assert_equal Yz::Zy, Yz::Zy::Cd.parent
assert_equal Yz, Yz::Zy.parent
assert_equal Object, Yz.parent
end
def test_parents
assert_equal [Yz::Zy, Yz, Object], Yz::Zy::Cd.parents
assert_equal [Yz, Object], Yz::Zy.parents
end
def test_as_load_path
assert_equal 'yz/zy', Yz::Zy.as_load_path
assert_equal 'yz', Yz.as_load_path
end
end
module BarMethodAliaser
def self.included(foo_class)
foo_class.alias_method_chain :bar, :baz
end
def bar_with_baz
bar_without_baz << '_with_baz'
end
def quux_with_baz!
quux_without_baz! << '_with_baz!'
end
def quux_with_baz?
false
end
end
class MethodAliasingTest < Test::Unit::TestCase
def setup
Object.const_set(:FooClassWithBarMethod, Class.new)
FooClassWithBarMethod.send(:define_method, 'bar', Proc.new { 'bar' })
@instance = FooClassWithBarMethod.new
end
def teardown
Object.send(:remove_const, :FooClassWithBarMethod)
end
def test_alias_method_chain
assert @instance.respond_to?(:bar)
feature_aliases = [:bar_with_baz, :bar_without_baz]
feature_aliases.each do |method|
assert !@instance.respond_to?(method)
end
assert_equal 'bar', @instance.bar
FooClassWithBarMethod.send(:include, BarMethodAliaser)
feature_aliases.each do |method|
assert @instance.respond_to?(method)
end
assert_equal 'bar_with_baz', @instance.bar
assert_equal 'bar', @instance.bar_without_baz
end
def test_alias_method_chain_with_punctuation_method
FooClassWithBarMethod.send(:define_method, 'quux!', Proc.new { 'quux' })
assert !@instance.respond_to?(:quux_with_baz!)
FooClassWithBarMethod.send(:include, BarMethodAliaser)
FooClassWithBarMethod.alias_method_chain :quux!, :baz
assert @instance.respond_to?(:quux_with_baz!)
assert_equal 'quux_with_baz!', @instance.quux!
assert_equal 'quux', @instance.quux_without_baz!
end
def test_alias_method_chain_with_same_names_between_predicates_and_bang_methods
FooClassWithBarMethod.send(:define_method, 'quux!', Proc.new { 'quux' })
FooClassWithBarMethod.send(:define_method, 'quux?', Proc.new { true })
assert !@instance.respond_to?(:quux_with_baz!)
assert !@instance.respond_to?(:quux_with_baz?)
FooClassWithBarMethod.send(:include, BarMethodAliaser)
FooClassWithBarMethod.alias_method_chain :quux!, :baz
FooClassWithBarMethod.alias_method_chain :quux?, :baz
assert @instance.respond_to?(:quux_with_baz!)
assert @instance.respond_to?(:quux_with_baz?)
assert_equal 'quux_with_baz!', @instance.quux!
assert_equal 'quux', @instance.quux_without_baz!
assert_equal false, @instance.quux?
assert_equal true, @instance.quux_without_baz?
end
end
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