# Use ‹aiohttp› (‹python -mpip install aiohttp›) to fetch a given
# URL and stream the HTML into ‹tidy› (‹html-tidy.org›).
# Specifically, use ‹tidy 2>&1› as the command that you start with
# ‹asyncio.create_subprocess_shell›. Capture the ‹stdout› and return
# the output until the first blank line, as a list of ‹bytes›
# objects.

import aiohttp
import asyncio
from asyncio.subprocess import PIPE

async def tidy( url ):
    pass

def test_main() -> None:

    async def main() -> None:
        out = await tidy( 'http://example.com' )
        assert b'Tidy found 1 warning and 0 errors!\n' in out, out
        assert len(out) <= 5

    asyncio.run( main() )

if __name__ == '__main__':
    test_main()