Testing code that requires a Flask app or request context

by

If you want to make a request to your application, use the test_client.

c = app.test_client()
response = c.get('/test/url')
# test response

If you want to test code which uses an application context (current_app, g, url_for), push an app_context.

with app.app_context():
    # test your app context code

If you want test code which uses a request context (request, session), push a test_request_context.

with current_app.test_request_context():
    # test your request context code

Both app and request contexts can also be pushed manually, which is useful when using the interpreter.

>>> ctx = app.app_context()
>>> ctx.push()

Flask-Script or the new Flask cli will automatically push an app context when running the shell command.

Flask-Testing is a useful library that contains helpers for testing Flask apps.

More Related Contents:

  1. How to return a dict as a JSON response from a Flask view?
  2. How to get POSTed JSON in Flask?
  3. Flask raises TemplateNotFound error even though template file exists
  4. Reference template variable within Jinja expression
  5. Flask application traceback doesn’t show up in server log
  6. Create and download a CSV file from a Flask view
  7. Redirecting to URL in Flask
  8. How do I get Flask to run on port 80?
  9. Get raw POST body in Python Flask regardless of Content-Type header
  10. Form sending error, Flask
  11. ImportError: No Module Named bs4 (BeautifulSoup)
  12. Disabling caching in Flask [duplicate]
  13. Is there an easy way to make sessions timeout in flask?
  14. Where should I place the secret key in Flask?
  15. Flask and uWSGI – unable to load app 0 (mountpoint=”) (callable not found or import error)
  16. RuntimeError: working outside of application context
  17. Method Not Allowed flask error 405
  18. CSS Problems with Flask Web App
  19. Python Flask, how to set content type
  20. Flask URL Route: Route Several URLs to the same function
  21. how to get access to error message from abort command when using custom error handler
  22. Gunicorn can’t find app when name changed from “application”
  23. Flask(‘application’) versus Flask(__name__)
  24. How do I get the user agent with Flask?
  25. Flask css not updating [closed]
  26. flask socketio emit to specific user
  27. Delete an uploaded file after downloading it from Flask
  28. Dynamic choices WTForms Flask SelectField
  29. Static files in Flask – robot.txt, sitemap.xml (mod_wsgi)
  30. flask sqlalchemy query with keyword as variable

Leave a Comment