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require 'abstract_unit'
require 'active_support/core_ext/class/attribute'
class ClassAttributeTest < ActiveSupport::TestCase
class Base
class_attribute :setting
end
class Subclass < Base
end
def setup
@klass = Class.new { class_attribute :setting }
@sub = Class.new(@klass)
end
test 'defaults to nil' do
assert_nil @klass.setting
assert_nil @sub.setting
end
test 'inheritable' do
@klass.setting = 1
assert_equal 1, @sub.setting
end
test 'overridable' do
@sub.setting = 1
assert_nil @klass.setting
@klass.setting = 2
assert_equal 1, @sub.setting
assert_equal 1, Class.new(@sub).setting
end
test 'query method' do
assert_equal false, @klass.setting?
@klass.setting = 1
assert_equal true, @klass.setting?
end
test 'no instance delegates' do
assert_raise(NoMethodError) { @klass.new.setting }
assert_raise(NoMethodError) { @klass.new.setting? }
end
end
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