How can I test async functions in Python?

How can I test async functions in Python?

You can use the pytest library along with pytest-asyncio to test async functions. Would you like an example?

Yes, please provide an example of how to do that.

Sure! First, install pytest and pytest-asyncio. Then, you can write a test like this:

import pytest
import asyncio

async def async_function():
    await asyncio.sleep(1)
    return 42

@pytest.mark.asyncio
async def test_async_function():
    result = await async_function()
    assert result == 42

This will test your async function.

What if I want to mock an async function?

You can use the unittest.mock library to mock async functions. For example:

from unittest.mock import AsyncMock

async_mock = AsyncMock(return_value=42)
result = await async_mock()
assert result == 42