at-and-at-at-test3.rb

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

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

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

  def test_instance_reader
    SampleClass.c = 3
    instance = SampleClass.new
    refute_equal(3, instance.c)
  end

  def test_instance_writer
    instance = SampleClass.new
    instance.c = 4
    refute_equal(4, SampleClass.c)
  end
end