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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 114
number = 21
visible = True
facts = None
solution = '''\
conc114([], L, L).
conc114([H|T], L2, [H|L]) :-
conc114(T, L2, L).
shiftright(L1, [H|T]) :-
conc114(T, [H], L1).
'''
test_cases = [
('shiftright([i], X)',
[{'X': '[i]'}]),
('shiftright([h, e, u, l], X)',
[{'X': '[l, h, e, u]'}]),
('shiftright([h, A, B, l, c], [C, D, x, y, E])',
[{'A': 'x', 'B': 'y', 'C': 'c', 'D': 'h', 'E': 'l'}]),
]
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:
if prolog.engine.check_answers(engine_id, query=query, 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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