Testing routes and responses in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Flask

with app.[1]() as client:
    response = client.get('/')

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

Arun

Btest_request_context

Ctest_client

Dapp_context

Attempts:

3 left

💡 Hint

Common Mistakes

Using app.run() instead of app.test_client()

Using app.app_context() which is for context, not client

Using test_request_context() which is for context, not client

The test_client() method creates a client to simulate requests to the Flask app for testing.

2fill in blank

medium

Complete the code to check the HTTP status code of the response.

Flask

assert response.[1] == 200

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

Aheaders

Bstatus_code

Ccontent

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Checking response.data instead of status_code

Using response.content which is not a Flask attribute

Checking response.headers instead of status_code

The status_code attribute holds the HTTP status code returned by the response.

3fill in blank

hard

Fix the error in the test by completing the code to decode the response data.

Flask

assert response.data.[1]('utf-8') == 'Hello, World!'

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

Adecode

Bsplit

Cencode

Dstrip

Attempts:

3 left

💡 Hint

Common Mistakes

Using encode() which converts string to bytes

Using split() or strip() which do not convert bytes to string

The response data is bytes, so we decode it to a string using decode('utf-8').

4fill in blank

hard

Fill both blanks to test a POST request with JSON data and check the response JSON.

Flask

response = client.post('/submit', json=[1])
assert response.[2]['status'] == 'success'

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

A{'name': 'Alice'}

Bjson

Cdata

D{'status': 'success'}

Attempts:

3 left

💡 Hint

Common Mistakes

Passing JSON as a string instead of a dictionary

Using response.data instead of response.json for JSON response

We send JSON data as a dictionary in the json parameter. The response JSON is accessed via response.json.

5fill in blank

hard

Fill all three blanks to test a route with query parameters and check the response text.

Flask

response = client.get('/search?query=[1]')
assert response.[2] == 200
assert response.data.[3]('utf-8') == 'Results for test'

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

Atest

Bstatus_code

Cdecode

Dquery

Attempts:

3 left

💡 Hint

Common Mistakes

Not decoding response data before comparing

Checking response.data instead of response.status_code for status

Using wrong query parameter value

The query parameter is 'test'. We check status_code for 200. The response data is decoded with decode('utf-8') to compare text.