# frozen_string_literal: true
require "abstract_unit"
require "active_support/core_ext/module/aliasing"
module AttributeAliasing
class Content
attr_accessor :title, :Data
def initialize
@title, @Data = nil, nil
end
def title?
!title.nil?
end
def Data?
!self.Data.nil?
end
end
class Email < Content
alias_attribute :subject, :title
alias_attribute :body, :Data
end
end
class AttributeAliasingTest < ActiveSupport::TestCase
def test_attribute_alias
e = AttributeAliasing::Email.new
assert !e.subject?
e.title = "Upgrade computer"
assert_equal "Upgrade computer", e.subject
assert e.subject?
e.subject = "We got a long way to go"
assert_equal "We got a long way to go", e.title
assert e.title?
end
def test_aliasing_to_uppercase_attributes
# Although it's very un-Ruby, some people's AR-mapped tables have
# upper-case attributes, and when people want to alias those names
# to more sensible ones, everything goes *foof*.
e = AttributeAliasing::Email.new
assert !e.body?
assert !e.Data?
e.body = "No, really, this is not a joke."
assert_equal "No, really, this is not a joke.", e.Data
assert e.Data?
e.Data = "Uppercased methods are the suck"
assert_equal "Uppercased methods are the suck", e.body
assert e.body?
end
end
