153 lines
3.6 KiB
Ruby
153 lines
3.6 KiB
Ruby
require 'test_helper'
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require 'hanami/utils/class_attribute'
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describe Hanami::Utils::ClassAttribute do
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before do
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class ClassAttributeTest
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include Hanami::Utils::ClassAttribute
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class_attribute :callbacks, :functions, :values
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self.callbacks = [:a]
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self.values = [1]
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end
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class SubclassAttributeTest < ClassAttributeTest
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class_attribute :subattribute
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self.functions = [:x, :y]
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self.subattribute = 42
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end
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class SubSubclassAttributeTest < SubclassAttributeTest
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end
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class Vehicle
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include Hanami::Utils::ClassAttribute
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class_attribute :engines, :wheels
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self.engines = 0
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self.wheels = 0
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end
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class Car < Vehicle
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self.engines = 1
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self.wheels = 4
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end
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class Airplane < Vehicle
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self.engines = 4
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self.wheels = 16
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end
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class SmallAirplane < Airplane
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self.engines = 2
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self.wheels = 8
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end
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end
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after do
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[:ClassAttributeTest,
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:SubclassAttributeTest,
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:SubSubclassAttributeTest,
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:Vehicle,
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:Car,
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:Airplane,
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:SmallAirplane].each do |const|
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Object.send :remove_const, const
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end
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end
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it 'sets the given value' do
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ClassAttributeTest.callbacks.must_equal([:a])
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end
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describe "inheritance" do
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before do
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@debug = $DEBUG
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$DEBUG = true
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end
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after do
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$DEBUG = @debug
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end
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it 'the value it is inherited by subclasses' do
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SubclassAttributeTest.callbacks.must_equal([:a])
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end
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it 'if the superclass value changes it does not affects subclasses' do
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ClassAttributeTest.functions = [:y]
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SubclassAttributeTest.functions.must_equal([:x, :y])
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end
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it 'if the subclass value changes it does not affects superclass' do
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SubclassAttributeTest.values = [3,2]
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ClassAttributeTest.values.must_equal([1])
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end
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describe 'when the subclass is defined in a different namespace' do
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before do
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module Lts
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module Routing
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class Resource
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class Action
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include Hanami::Utils::ClassAttribute
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class_attribute :verb
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end
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class New < Action
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self.verb = :get
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end
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end
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class Resources < Resource
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class New < Resource::New
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end
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end
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end
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end
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end
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it 'refers to the superclass value' do
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Lts::Routing::Resources::New.verb.must_equal :get
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end
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end
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# it 'if the subclass value changes it affects subclasses' do
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# values = [3,2]
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# SubclassAttributeTest.values = values
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# SubclassAttributeTest.values.must_equal(values)
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# SubSubclassAttributeTest.values.must_equal(values)
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# end
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it 'if the subclass defines an attribute it should not be available for the superclass' do
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$DEBUG = @debug
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-> { ClassAttributeTest.subattribute }.must_raise(NoMethodError)
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end
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it 'if the subclass defines an attribute it should be available for its subclasses' do
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SubSubclassAttributeTest.subattribute.must_equal 42
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end
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it 'preserves values within the inheritance chain' do
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Vehicle.engines.must_equal 0
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Vehicle.wheels.must_equal 0
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Car.engines.must_equal 1
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Car.wheels.must_equal 4
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Airplane.engines.must_equal 4
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Airplane.wheels.must_equal 16
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SmallAirplane.engines.must_equal 2
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SmallAirplane.wheels.must_equal 8
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end
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it "doesn't print warnings when it gets inherited" do
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_, stderr = capture_io do
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Class.new(Vehicle)
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end
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stderr.must_be_empty
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end
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end
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end
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