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path: root/prolog/problems/lists/divide_3/common.py
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# coding=utf-8

from operator import itemgetter
import prolog.engine
import server.problems

id = 115
number = 22
visible = True
facts = None

solution = '''\
divide([], [], []).
divide([X], [X], []).
divide([H1,H2|T], [H1|L1], [H2|L2]) :-
  divide(T, L1, L2).
'''

test_cases = [
    ('divide([], A, B)',
        [{'A': '[]', 'B': '[]'}]),
    ('divide([q], A, B)',
        [{'A': '[q]', 'B': '[]'}]),
    ('divide([h, e, t, y, q, w], A, B)',
        [{'A': '[h, t, q]', 'B': '[e, y, w]'}]),
    ('divide([j, e, y, u, i], A, B)',
        [{'A': '[j, y, i]', 'B': '[e, u]'}]),
    ('divide(A, [t, q, y], [l, e, r])',
        [{'A': '[t, l, q, e, y, r]'}]),
]

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 []