def check_relation(nfa1, nfa2):
'''
:param nfa1: nfa
:param nfa2: nfa
:return: - 1 if model1 includes model 2
- -1 if model2 includes model 1
- 0 if the models are equal
- otherwise
'''
dfa1 = NFA.nfa_determinization(nfa1)
dfa1_comp = DFA.dfa_complementation(dfa1)
dfa2 = NFA.nfa_determinization(nfa2)
dfa2_comp = DFA.dfa_complementation(dfa2)
words_only_in_model2 = DFA.dfa_nonemptiness_check(DFA.dfa_intersection(dfa1_comp, dfa2))
words_only_in_model1 = DFA.dfa_nonemptiness_check(DFA.dfa_intersection(dfa2_comp, dfa1))
if words_only_in_model1\
and not words_only_in_model2:
return 1
elif words_only_in_model2\
and not words_only_in_model1:
dfa_intersect = DFA.dfa_intersection(dfa1_comp, dfa2)
dfa_intersect_minimized = DFA.dfa_co_reachable(DFA.dfa_minimization(dfa_intersect))
automata_IO.dfa_to_dot(dfa_intersect_minimized, 'csv_intersect', path)
return -1
elif not words_only_in_model2\
and not words_only_in_model1:
return 0
else:
return -1
def read_determinize_minimized_write(path, model):
nfa = automata_IO.nfa_dot_importer(path + model)
dfa = NFA.nfa_determinization(nfa)
automata_IO.dfa_to_dot(dfa, model + '_det', path)
new_dfa = DFA.dfa_minimization(dfa)
automata_IO.dfa_to_dot(new_dfa, model + "_det_min", path)
def test_nfa_determinization_bis(self):
""" Tests an other correct nfa determinization """
dfa_determined = NFA.nfa_determinization(
self.nfa_determinization_test_02)
# automata_IO.dfa_to_dot(dfa_determined, 'nfa_determined_2')
self.assertEqual(len(dfa_determined['alphabet']), 3)
self.assertEqual(len(dfa_determined['states']), 14)
self.assertEqual(len(dfa_determined['accepting_states']), 11)
self.assertEqual(len(dfa_determined['transitions']), 39)
def test_nfa_determinization(self):
""" Tests a correct nfa determinization """
dfa_determined = NFA.nfa_determinization(
self.nfa_determinization_test_01)
# automata_IO.dfa_to_dot(dfa_determined, 'nfa_determined')
self.assertEqual(len(dfa_determined['alphabet']), 2)
self.assertEqual(len(dfa_determined['states']), 10)
self.assertEqual(len(dfa_determined['accepting_states']), 6)
self.assertEqual(len(dfa_determined['transitions']), 19)
def test_nfa_determinization_empty_states(self):
""" Tests a NFA determinization with an empty NFA """
dfa_determined = NFA.nfa_determinization(
self.nfa_determinization_test_empty)
# automata_IO.dfa_to_dot(dfa_determined,
# 'nfa_determined_empty_States')
self.assertDictEqual(
dfa_determined, {
'alphabet': set(),
'states': set(),
'initial_state': None,
'accepting_states': set(),
'transitions': {}
})
def test_nfa_determinization_empty_transitions(self):
""" Tests a NFA determinization with a NFA without
transitions """
self.nfa_determinization_test_01['transitions'] = {}
dfa_determined = NFA.nfa_determinization(
self.nfa_determinization_test_01)
# automata_IO.dfa_to_dot(dfa_determined,
# 'nfa_determined_empty_transition')
self.assertDictEqual(
dfa_determined, {
'alphabet':
self.nfa_determinization_test_01['alphabet'],
'states':
{str(self.nfa_determinization_test_01['initial_states'])},
'initial_state':
str(self.nfa_determinization_test_01['initial_states']),
'accepting_states':
set(),
'transitions': {}
})
def test_nfa_determinization_side_effects(self):
""" Tests the function doesn't make any side effect on
the input """
before = copy.deepcopy(self.nfa_determinization_test_01)
NFA.nfa_determinization(self.nfa_determinization_test_01)
self.assertDictEqual(before, self.nfa_determinization_test_01)
def test_nfa_determinization_wrong_dict(self):
""" Tests the function using an input different from a
well formatted dict representing a nfa. [EXPECTED
FAILURE] """
NFA.nfa_determinization({'goofy': 'donald'})
def test_nfa_determinization_wrong_input(self):
""" Tests the function using an input different from a
dict object. [EXPECTED FAILURE] """
NFA.nfa_determinization(0)