at-and-at-at-test1.rb

require "test/unit"
require "./at-and-at-at-class"

class TestAtAtVariables < Test::Unit::TestCase
  def test_direct_assignment
    SampleClass.a = 1
    assert_equal(1, SampleClass.a)
    assert_equal(1, SampleSubClassA.a)
    assert_equal(1, SampleSubClassB.a)
  end

  def test_subclass_assignment
    SampleSubClassA.a = 2
    assert_equal(2, SampleClass.a)
    assert_equal(2, SampleSubClassA.a)
    assert_equal(2, SampleSubClassB.a)
  end

  def test_instance_reader
    SampleClass.a = 3
    instance = SampleClass.new
    assert_equal(3, instance.a)
  end

  def test_instance_writer
    instance = SampleClass.new
    instance.a = 4
    assert_equal(4, SampleClass.a)
  end
end