Testing authentication flows in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flask testing client.

Flask

from flask import Flask
from flask.testing import [1]

Drag options to blanks, or click blank then click option'

ATestClient

BFlaskClient

CClient

DTestCase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'TestClient' which is not the correct Flask class.

Importing 'TestCase' instead of the client.

The Flask testing client is imported as FlaskClient from flask.testing.

2fill in blank

medium

Complete the code to create a test client from the Flask app.

Flask

app = Flask(__name__)
client = app.[1]()

Drag options to blanks, or click blank then click option'

Atest_client

Bcreate_client

Cclient

Dtest

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'create_client' which is not a Flask method.

Using 'client' which is just a variable name.

The method to create a test client in Flask is test_client().

3fill in blank

hard

Fix the error in the test login POST request code.

Flask

response = client.post('/login', data=[1], follow_redirects=True)

Drag options to blanks, or click blank then click option'

A'username=user&password=pass'

B['username', 'user', 'password', 'pass']

C{'username': 'user', 'password': 'pass'}

D('username', 'user', 'password', 'pass')

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a list or tuple instead of a dictionary.

Passing a URL-encoded string instead of a dict.

The data argument expects a dictionary with form keys and values.

4fill in blank

hard

Fill both blanks to check if the login response contains the welcome message.

Flask

assert [1] in response.data.decode('utf-8') and response.status_code == [2]

Drag options to blanks, or click blank then click option'

A'Welcome, user!'

B200

C404

D'Login failed'

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for 'Login failed' instead of the welcome message.

Using status code 404 which means not found.

The response should contain the welcome message string and have status code 200 for success.

5fill in blank

hard

Fill all three blanks to test logout and verify redirection status code.

Flask

logout_response = client.get('/logout', follow_redirects=[1])
assert logout_response.status_code == [2]
assert '[3]' in logout_response.data.decode('utf-8')

Drag options to blanks, or click blank then click option'

ATrue

B302

C'Login Page'

DFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Setting follow_redirects to False and missing the redirect.

Checking for wrong status codes or page content.

Follow redirects should be True to follow the logout redirect. The status code 302 means redirect. The login page text confirms logout success.