import unittest

from policy import Policy


class HoldoutPolicyTests(unittest.TestCase):
    def test_unrelated_flag_change_preserves_correct_answers(self):
        policy = Policy({"a": True, "b": False})
        self.assertTrue(policy.allows("u", "a"))
        policy.set_flag("b", True)
        self.assertTrue(policy.allows("u", "a"))
        self.assertTrue(policy.allows("u", "b"))