59 lines
2.1 KiB
Python
59 lines
2.1 KiB
Python
# Copyright (c) 2017 PySecretHandshake contributors (see AUTHORS for more details)
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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"""Helper utilities for testing"""
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from asyncio import StreamReader, StreamWriter
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from io import BytesIO
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from typing import AsyncIterable, List, Optional, TypeVar
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T = TypeVar("T")
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class AsyncBuffer(BytesIO, StreamReader, StreamWriter): # type: ignore[misc]
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"""Just a BytesIO with an async read method."""
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async def read( # type: ignore[override] # pylint: disable=invalid-overridden-method
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self, n: Optional[int] = None
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) -> Optional[bytes]:
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v = super().read(n)
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return v
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readexactly = read # type: ignore[assignment]
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def append(self, data: bytes) -> None:
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"""Append data to the buffer without changing the current position."""
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pos = self.tell()
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self.write(data)
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self.seek(pos)
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async def async_comprehend(generator: AsyncIterable[T]) -> List[T]:
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"""Emulate ``[elem async for elem in generator]``."""
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results = []
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async for msg in generator:
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results.append(msg)
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return results
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