import unittest

import stl


class TestSTLAST(unittest.TestCase):
    def test_and(self):
        phi = stl.parse("x")
        self.assertEqual(stl.TOP, stl.TOP | phi)
        self.assertEqual(stl.BOT, stl.BOT & phi)
        self.assertEqual(stl.TOP, phi | stl.TOP)
        self.assertEqual(stl.BOT, phi & stl.BOT)
        self.assertEqual(phi, phi & stl.TOP)
        self.assertEqual(phi, phi | stl.BOT)
        self.assertEqual(stl.TOP, stl.TOP & stl.TOP)
        self.assertEqual(stl.BOT, stl.BOT | stl.BOT)
        self.assertEqual(stl.TOP, stl.TOP | stl.BOT)
        self.assertEqual(stl.BOT, stl.TOP & stl.BOT)
        self.assertEqual(~stl.BOT, stl.TOP)
        self.assertEqual(~stl.TOP, stl.BOT)
        self.assertEqual(~~stl.BOT, stl.BOT)
        self.assertEqual(~~stl.TOP, stl.TOP)