Example of how to use the Flask `test_request_context` with a cookie set

test_flask_cookie.py

from flask import Flask, request
from werkzeug.http import dump_cookie

def test_cookie(app: Flask) -> None:
    header = dump_cookie('Name', 'value')
    with app.test_request_context(environ_base={'HTTP_COOKIE': header}):
        assert request.cookies['Name'] == 'value'

It did work!!! Thanks a lot.

from views import application, autocomplete
ctx = application.test_request_context(path='/login',method='POST', data={'user':'demo','password':'demo123'})
ctx.push()
application.preprocess_request()
query = 'ttll'
autocomplete.autocomplete(query,'gene').json

2020-07-12 13:11:44,523 INFO sqlalchemy.engine.base.Engine SELECT users."user" AS users_user, users.argon_password AS users_argon_password
FROM users
WHERE users."user" = %(user_1)s
2020-07-12 13:11:44,523 INFO sqlalchemy.engine.base.Engine {'user_1': 'demo'}
[D 200712 13:11:44 autocomplete:15] Autocomplete query 'ttll' and query type 'gene'
Out[5]:
['TTLL5',
 'ARPC4-TTLL3',
 'TTLL2',
 'TTLL7-IT1',
 'TTLL1',
 'TTLL10',
 'TTLL3',
 'TTLL6',
 'TTLL10-AS1',
 'TTLL4',
 'TTLL11',
 'TTLL13P',
 'TTLL12',
 'TTLL11-IT1',
 'TTLL8',
 'TTLL9',
 'TTLL7']