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from unittest import TestCase, main
from multiprocessing import Process, Queue
from six.moves.queue import Empty
import sys
if ".." not in sys.path:
sys.path.insert(0, "..")
from ply.lex import lex
from ply.cpp import *
def preprocessing(in_, out_queue):
out = None
try:
p = Preprocessor(lex())
p.parse(in_)
tokens = [t.value for t in p.parser]
out = "".join(tokens)
finally:
out_queue.put(out)
class CPPTests(TestCase):
"Tests related to ANSI-C style lexical preprocessor."
def __test_preprocessing(self, in_, expected, time_limit = 1.0):
out_queue = Queue()
preprocessor = Process(
name = "PLY`s C preprocessor",
target = preprocessing,
args = (in_, out_queue)
)
preprocessor.start()
try:
out = out_queue.get(timeout = time_limit)
except Empty:
preprocessor.terminate()
raise RuntimeError("Time limit exceeded!")
else:
self.assertMultiLineEqual(out, expected)
def test_concatenation(self):
self.__test_preprocessing("""\
#define a(x) x##_
#define b(x) _##x
#define c(x) _##x##_
#define d(x,y) _##x##y##_
a(i)
b(j)
c(k)
d(q,s)"""
, """\
i_
_j
_k_
_qs_"""
)
main()
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