How can I test asynchronous code in Flask?

How can I test asynchronous code in Flask?

You can use the pytest framework along with pytest-asyncio to test asynchronous code in Flask.

Can you show me a simple example of how to set this up?

Sure! First, install pytest and pytest-asyncio. Then, create a test file like this:

import pytest
from your_flask_app import create_app

@pytest.mark.asyncio
def test_async_route():
    app = create_app()
    client = app.test_client()
    response = await client.get('/async-route')
    assert response.status_code == 200

What if I need to mock a database call in my async tests?

You can use unittest.mock to patch your database calls. For example:

from unittest.mock import patch

@pytest.mark.asyncio
@patch('your_flask_app.database_call')
def test_async_route(mock_db_call):
    mock_db_call.return_value = 'mocked data'
    # Your test code here