person.member_from = Time.zone.local(2001, 1, 1)
      person.member_to = Time.zone.local(2001, 12, 31)
      assert_equal(false, person.member?, "member?")
      assert_equal(false, person.member?(Time.zone.local(2000, 12, 31)), "member")
      assert_equal(true, person.member?(Time.zone.local(2001, 1, 1)), "member")