import asyncio
import secrets
from dataclasses import dataclass


# N.B. `frozen=True` makes each instance hashable.
@dataclass(frozen=True)
class RandBits:
    bits: int = 20

    def __await__(self):
        return self.randbits().__await__()

    async def randbits(self):
        return secrets.randbits(self.bits)


async def test_randbits():
    """This test fails because of future dedup/coalescing in asyncio.gather."""

    x, y = await asyncio.gather(RandBits(), RandBits())
    assert x != y


asyncio.run(test_randbits())