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import pathlib
import shutil
import sys
import tempfile
from hypothesis import given
from hypothesis import strategies as st
import ppmd
MAX_SIZE = min(0xFFFFFFFF - 12 * 3, sys.maxsize)
@given(obj=st.binary(min_size=1),
max_order=st.integers(min_value=2, max_value=64),
mem_size=st.integers(min_value=1 << 11, max_value=MAX_SIZE))
def test_ppmd7_fuzzer(obj, max_order, mem_size):
tmp_path = pathlib.Path(tempfile.mkdtemp())
with tmp_path.joinpath('target.ppmd').open('wb') as target:
with ppmd.Ppmd7Encoder(target, max_order=max_order, mem_size=mem_size) as enc:
enc.encode(obj)
enc.flush()
with tmp_path.joinpath('target.ppmd').open('rb') as target:
with ppmd.Ppmd7Decoder(target, max_order=max_order, mem_size=mem_size) as dec:
res = dec.decode(len(obj))
assert obj == res
shutil.rmtree(tmp_path)
if __name__ == "__main__":
import atheris # type: ignore # noqa
atheris.Setup(sys.argv, test_ppmd7_fuzzer.hypothesis.fuzz_one_input)
atheris.Fuzz()
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