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from operator import itemgetter
import socket
import prolog.engine
from server.hints import Hint, HintPopup
id = 122
number = 30
visible = True
facts = None
solution = '''\
sins(X, [], [X]).
sins(X, [Y|T], [X,Y|T]) :-
X =< Y.
sins(X, [Y|T], [Y|L]) :-
X > Y,
sins(X, T, L).
'''
hint_type = {
'eq_instead_of_equ_markup': HintPopup('eq_instead_of_equ_markup'),
'eq_instead_of_equ': Hint('eq_instead_of_equ'),
'predicate_always_false': Hint('predicate_always_false'),
'base_case': Hint('base_case'),
'recursive_case': Hint('recursive_case'),
'timeout': Hint('timeout'),
'bad_[]_case': Hint('bad_[]_case'),
'returns_elem_instead_of_list': Hint('returns_elem_instead_of_list'),
'maxEl_base_case_missing': Hint('maxEl_base_case_missing'),
'x_and_head_swapped': Hint('x_and_head_swapped'),
'duplicates_incorrect': Hint('duplicates_incorrect'),
'unprotected_branch': Hint('unprotected_branch'),
'forgotten_heads': Hint('forgotten_heads'),
}
test_cases = [
('sins(4, [], X)',
[{'X': '[4]'}]),
('sins(4, [1, 2, 5, 6, 8], X)',
[{'X': '[1, 2, 4, 5, 6, 8]'}]),
('sins(8, [1, 2, 3, 4, 5, 6, 7], X)',
[{'X': '[1, 2, 3, 4, 5, 6, 7, 8]'}]),
('sins(1, [2, 3, 4, 5, 6, 7], X)',
[{'X': '[1, 2, 3, 4, 5, 6, 7]'}]),
('sins(2, [2, 3, 4, 5, 6, 7], X)',
[{'X': '[2, 2, 3, 4, 5, 6, 7]'}]),
]
def test(code, aux_code):
n_correct = 0
engine_id = None
try:
engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
if engine_id is not None and 'error' not in map(itemgetter(0), output):
# Engine successfully created, and no syntax error in program.
for query, answers in test_cases:
if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0):
n_correct += 1
except socket.timeout:
pass
finally:
if engine_id:
prolog.engine.destroy(engine_id)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
return n_correct, len(test_cases), hints
def hint(code, aux_code):
tokens = prolog.util.tokenize(code)
try:
engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
# strict equality testing instead of simple matching
# this is usually (but not necessarily) wrong
targets = [prolog.util.Token('EQ', '==')]
marks = [(t.pos, t.pos + len(t.val)) for t in tokens if t in targets]
if marks:
return [{'id': 'eq_instead_of_equ_markup', 'start': m[0], 'end': m[1]} for m in marks] + \
[{'id': 'eq_instead_of_equ'}]
if prolog.engine.ask_truthTO(engine_id, '''\
sins(yowza, [], [])
;
sins(yowza, [], cob(Q, q))'''):
return [{'id': 'bad_[]_case'}]
if prolog.engine.ask_truthTO(engine_id, 'sins(yowza, [], yowza)'):
return [{'id': 'returns_elem_instead_of_list'}]
if prolog.engine.ask_truthTO(engine_id, '''\
sins(4, [1, 3, 5, 6], [1, 3, 4, 5, 6]),
\+ sins(9, [1, 3, 5, 6], [1, 3, 5, 6, 9]),
\+ sins(39, [], [39])'''):
return [{'id': 'maxEl_base_case_missing'}]
if prolog.engine.ask_truthTO(engine_id,
'sins(4, [1, 3, 5, 6], [1, 3, 5, 4, 9])'):
return [{'id': 'x_and_head_swapped'}]
if prolog.engine.ask_truthTO(engine_id, '''\
sins(4, [1, 3, 5, 6], [1, 3, 4, 5, 6]),
\+ sins(5, [1, 3, 5, 6], [1, 3, 5, 5, 6])
;
findall(L, sins(5, [1, 3, 5, 6], L),
[[1, 3, 5, 5, 6], [1, 3, 5, 6, 5]])'''):
return [{'id': 'duplicates_incorrect'}]
# incorrect solutions after first one
if prolog.engine.ask_truthTO(engine_id, '''\
findall(X, sins(4, [1, 2, 3, 5, 6, 7], X),
[[1, 2, 3, 4, 5, 6, 7] | L]),
length(L, N), N > 0'''):
return [{'id': 'unprotected_branch'}]
if prolog.engine.ask_truthTO(engine_id, '''\
sins(4, [1, 3, 5, 6], [4, 5, 6]),
sins(9, [1, 3, 5, 6, 8, 39], [9, 39])'''):
return [{'id': 'forgotten_heads'}]
# missing/failed base case
if not prolog.engine.ask_truthTO(engine_id, 'sins(42, [], [42])'):
return [{'id': 'base_case'}]
# target predicate seems to always be false
if not prolog.engine.ask_truthTO(engine_id, 'sins(_, _, _)'):
return [{'id': 'predicate_always_false'}]
# base case works, the recursive doesn't (but it doesn't timeout)
# this may be left as the last, most generic hint
if not prolog.engine.ask_truth(engine_id,
'sins(42, [-2, 41, 82, 100], [-2, 41, 42, 82, 100])'):
return [{'id': 'recursive_case'}]
except socket.timeout as ex:
return [{'id': 'timeout'}]
finally:
if engine_id:
prolog.engine.destroy(engine_id)
return []
|
