1.rb

require 'minitest/autorun'

class MyClass
  def initialize
    @a = 1
  end

  def a
    "not a 1"
  end
end

class TestMeme < MiniTest::Unit::TestCase
  def setup
    @var = MyClass.new
  end

  def test_case
    assert_equal(1, @var.send('a'), "This should fail")
    assert_equal(1, @var.instance_variable_get(:@a))
  end
end