class prop_logicTest(InvenioTestCase):
"""Testing basic propositional logic functionality"""
P = Expr('P')
def test_pl_true_P_true(self):
"""logicutils - True thing is evaluated as such"""
self.assertEqual(pl_true(self.P, {self.P: True}), True)
def test_pl_true_P_false(self):
"""logicutils - False thing is evaluated as such"""
self.assertEqual(pl_true(self.P, {self.P: False}), False)
def test_ANDed_pair(self):
"""logicutils - ANDed pair should be in CNF"""
self.assertEqual(to_cnf(expr('a & b')), Expr('&', 'a', 'b'))
def test_ORed_pair(self):
"""logicutils - ORed pair should be in CNF"""
self.assertEqual(to_cnf(expr('a | b')), Expr('|', 'a', 'b'))
def test_singleton(self):
"""logicutils - singletons are already in CNF"""
self.assertEqual(to_cnf(expr('a')), Expr('a'))
def test_deep_expr(self):
"""logicutils - create deep Expr with expr()"""
self.assertEqual(
expr('a | b | c | d | e'),
Expr('|', Expr('|', Expr('|', Expr('|', 'a', 'b'), 'c'), 'd'),
'e'))
def test_trivial_expr(self):
"""logicutils - create trivial Expr with expr()"""
self.assertEqual(expr('a | b'), Expr('|', 'a', 'b'))
