# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/pylint-dev/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/pylint-dev/pylint/blob/main/CONTRIBUTORS.txt

import io

from pylint.utils import utils


def test_decoding_stream_unknown_encoding() -> None:
    """Decoding_stream should fall back to *some* decoding when given an
    unknown encoding.
    """
    binary_io = io.BytesIO(b"foo\nbar")
    stream = utils.decoding_stream(binary_io, "garbage-encoding")
    # should still act like a StreamReader
    ret = stream.readlines()
    assert ret == ["foo\n", "bar"]


def test_decoding_stream_known_encoding() -> None:
    binary_io = io.BytesIO("€".encode("cp1252"))
    stream = utils.decoding_stream(binary_io, "cp1252")
    assert stream.read() == "€"