Mastering Unit Testing with Pytest/

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Testing Flask Applications

Testing Flask Applications

Learn how to test any Flask application.

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Flask test client fixture

In pytest, we can define fixtures to set up and tear down resources needed for the tests. In the case of Flask applications, we can create a fixture for the Flask test client, which allows us to make requests to the application endpoints during testing. Here’s an example of how to define a Flask test client fixture using pytest:

import pytest

from app import create_app



@pytest.fixture

def client():

    app = create_app()

    app.config['TESTING'] = True



    with app.test_client() as client:

        yield client
Flask test client

In the above example, we create a fixture named client using the pytest.fixture decorator. Inside the fixture function, we create an instance of the Flask application using the create_app() function from ...

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