PySecretHandshake/tests/helpers.py

# Copyright (c) 2017 PySecretHandshake contributors (see AUTHORS for more details)
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"""Helper utilities for testing"""

from io import BytesIO


class AsyncBuffer(BytesIO):
    """Just a BytesIO with an async read method."""

    async def read(self, n=None):  # pylint: disable=invalid-overridden-method
        v = super().read(n)

        return v

    readexactly = read

    def append(self, data):
        """Append data to the buffer without changing the current position."""
        pos = self.tell()
        self.write(data)
        self.seek(pos)


async def async_comprehend(generator):
    """Emulate ``[elem async for elem in generator]``."""

    results = []

    async for msg in generator:
        results.append(msg)

    return results