def test_multiples(self):
a = pcaparser.PARSER.parse('A and B and C or D or F')
to_assert = pcaprop.DisjunctionOp(pcaprop.DisjunctionOp(
pcaprop.ConjunctionOp(pcaprop.ConjunctionOp(pcaprop.Variable('A'), pcaprop.Variable('B')),
pcaprop.Variable('C')), pcaprop.Variable('D')), pcaprop.Variable('F'))
self.assertEqual(a, to_assert)
a = pcaparser.PARSER.parse('A implies B implies C iff D iff F')
to_assert = pcaprop.EquivalenceOp(pcaprop.EquivalenceOp(
pcaprop.ImplicationOp(pcaprop.ImplicationOp(pcaprop.Variable('A'), pcaprop.Variable('B')),
pcaprop.Variable('C')), pcaprop.Variable('D')), pcaprop.Variable('F'))
self.assertEqual(a, to_assert)
def test_prop(self):
a = pcaparser.PARSER.parse('P or B iff C and A implies (P and C)')
to_assert = pcaprop.EquivalenceOp(pcaprop.DisjunctionOp(pcaprop.Variable('P'), pcaprop.Variable('B')),
pcaprop.ImplicationOp(
pcaprop.ConjunctionOp(pcaprop.Variable('C'), pcaprop.Variable('A')),
pcaprop.ConjunctionOp(pcaprop.Variable('P'), pcaprop.Variable('C'))))
self.assertEqual(a, to_assert)
a = pcaparser.PARSER.parse('true or not A implies false and not not not B or A')
to_assert = pcaprop.ImplicationOp(
pcaprop.DisjunctionOp(pcaprop.TrueProp(), pcaprop.NegationOp(pcaprop.Variable('A'))),
pcaprop.DisjunctionOp(
pcaprop.ConjunctionOp(pcaprop.FalseProp(), pcaprop.NegationOp(
pcaprop.NegationOp(pcaprop.NegationOp(pcaprop.Variable('B'))))),
pcaprop.Variable('A')))
self.assertEqual(a, to_assert)
def test_commutativity(self):
self.assertTrue(
pcabuilder.InitProp('A and B').commutativity() == pcaprop.
ConjunctionOp(pcaprop.Variable('B'), pcaprop.Variable('A')))
self.assertTrue(
pcabuilder.InitProp('A and (C and B)').commutativity() ==
pcaprop.ConjunctionOp(
pcaprop.ConjunctionOp(pcaprop.Variable(
'B'), pcaprop.Variable('C')), pcaprop.Variable('A')))
self.assertTrue(
pcabuilder.InitProp('A or (C and ( D or B))').commutativity() ==
pcaprop.DisjunctionOp(
pcaprop.ConjunctionOp(
pcaprop.DisjunctionOp(pcaprop.Variable('B'),
pcaprop.Variable('D')),
pcaprop.Variable('C')), pcaprop.Variable('A')))
self.assertTrue(
pcabuilder.InitProp('B implies (A and B)').commutativity() ==
pcaprop.ImplicationOp(
pcaprop.Variable('B'),
pcaprop.ConjunctionOp(pcaprop.Variable('B'),
pcaprop.Variable('A'))))
self.assertTrue(
pcabuilder.InitProp('not not (A and B)').commutativity() ==
pcaprop.NegationOp(
pcaprop.NegationOp(
pcaprop.ConjunctionOp(pcaprop.Variable('B'),
pcaprop.Variable('A')))))
def exp_implies(self, value):
if len(value) == 3:
return pcaprop.ImplicationOp(value[0], value[2])
return self._rec_object(value, 'exp_implies')
def test_precedence(self):
a = pcaprop.Variable("A")
b = pcaprop.Variable("B")
self.assertEqual((a + b >> ~a * b), pcaprop.ImplicationOp(
pcaprop.DisjunctionOp(a, b), pcaprop.ConjunctionOp(pcaprop.NegationOp(a), b)))
def test_creation(self):
a = pcaprop.Variable("A")
b = pcaprop.Variable("B")
c = pcaprop.Variable("C")
self.assertEqual(a >> (~(a * b) + c), pcaprop.ImplicationOp(
a, pcaprop.DisjunctionOp(pcaprop.NegationOp(pcaprop.ConjunctionOp(a, b)), c)))