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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 120
number = 27
visible = True
facts = None
solution = '''\
count(_, [], 0).
count(X, [X|T], N) :-
count(X, T, NT),
N is NT + 1.
count(X, [Y|T], NT) :-
X \== Y,
count(X, T, NT).
'''
test_cases = [
('count(a, [], X)',
[{'X': '0'}]),
('count(r, [a, r, b, c, r], X)',
[{'X': '2'}]),
('count(l, [l, l, l, 1, 2, 3], X)',
[{'X': '3'}]),
('count(z, [a, b, c, z, z], X)',
[{'X': '2'}]),
]
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):
# TODO
return []
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