How can I use mocking in Flask tests?

How can I use mocking in Flask tests?

You can use the unittest.mock module to mock objects in your Flask tests. This allows you to simulate behavior without relying on external systems.

Can you give me an example of mocking a database call?

Sure! You can use patch to mock the database call. For example:

from unittest.mock import patch

@patch('yourapp.models.db.session')
def test_your_function(mock_db_session):
    mock_db_session.query.return_value = [MockUser()]
    # Your test code here

What about mocking external API calls?

You can mock external API calls using the same patch method. For instance:

@patch('requests.get')
def test_external_api_call(mock_get):
    mock_get.return_value.json.return_value = {'key': 'value'}
    # Your test code here

Are there any best practices for mocking?

Yes, keep your mocks as simple as possible, only mock what you need, and ensure your tests remain readable.