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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 128
number = 35
visible = True
facts = None
solution = '''\
memb128(X, [X|_]).
memb128(X, [_|T]) :-
memb128(X, T).
union([], S2, S2).
union([H|T], S2, [H|U]) :-
\+ memb128(H, S2),
union(T, S2, U).
union([H|T], S2, U) :-
memb128(H, S2),
union(T, S2, U).
'''
test_cases = [
('union([], [3,2,5,1], A), msort(A, X)',
[{'X': '[1, 2, 3, 5]'}]),
('union([3,2,5,1], [], A), msort(A, X)',
[{'X': '[1, 2, 3, 5]'}]),
('union([3,2,5,1], [8,4,2,3,5,1,9], A), msort(A, X)',
[{'X': '[1, 2, 3, 4, 5, 8, 9]'}]),
('union([2,3,5,1,9], [3,0,9,5,6], A), msort(A, X)',
[{'X': '[0, 1, 2, 3, 5, 6, 9]'}]),
]
def test(program, solved_problems):
code = (program + '\n' +
server.problems.solutions_for_problems('prolog', solved_problems))
n_correct = 0
engine_id = None
try:
engine_id, output = prolog.engine.create(code=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:
# Limit inferences for each solution to curb unbounded recursion.
limited = 'call_with_inference_limit(({}), 100000, _)'.format(query)
if prolog.engine.check_answers(engine_id, query=limited, answers=answers, timeout=1.0):
n_correct += 1
finally:
if engine_id:
prolog.engine.destroy(engine_id)
passed = n_correct == len(test_cases)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
return passed, hints
def hint(program, solved_problems):
# TODO
return []
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