API test automation concepts in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a GET request using the requests library.

Testing Fundamentals

response = requests.[1]('https://api.example.com/data')

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

Aget

Bpost

Cput

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'post' instead of 'get' for retrieving data.

The get method sends a GET request to retrieve data from the API.

2fill in blank

medium

Complete the code to check if the response status code is 200 (OK).

Testing Fundamentals

assert response.[1] == 200

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

Astatus_code

Btext

Cjson

Dheaders

Attempts:

3 left

💡 Hint

Common Mistakes

Checking response.text instead of response.status_code.

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

3fill in blank

hard

Fix the error in the code to parse JSON response correctly.

Testing Fundamentals

data = response.[1]()

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

Atext

Bcontent

Cjson

Dstatus_code

Attempts:

3 left

💡 Hint

Common Mistakes

Using response.text instead of response.json() to parse JSON.

The json() method parses the response body as JSON and returns a dictionary.

4fill in blank

hard

Fill both blanks to send a POST request with JSON payload and check status code.

Testing Fundamentals

response = requests.[1]('https://api.example.com/create', json=[2])
assert response.status_code == 201

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

Apost

B{'name': 'test'}

C{'id': 1}

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using GET method instead of POST.

Passing payload as string instead of dictionary.

Use post to send data and provide the JSON payload as a dictionary.

5fill in blank

hard

Fill all three blanks to extract a value from JSON response and assert it equals expected.

Testing Fundamentals

data = response.[1]()
value = data.get('[2]')
assert value [3] 'success'

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

Ajson

Bstatus

C==

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using response.text instead of response.json().

Wrong key name in get().

Using assignment '=' instead of comparison '=='.

Parse JSON with json(), get the 'status' key, and assert it equals 'success'.

Practice

1. What is the main purpose of API test automation?

easy

A. To design the user interface of an application

B. To check if different software parts communicate correctly

C. To write code for the backend server

D. To create database schemas

Solution

1. Step 1: Understand API test automation goal

   API test automation focuses on verifying communication between software parts via APIs.

2. Step 2: Eliminate unrelated options

   Designing UI, writing backend code, and creating database schemas are not related to API test automation.

3. Final Answer:

   To check if different software parts communicate correctly -> Option B

4. Quick Check:

   API test automation = communication check [OK]

Hint: API tests check communication, not UI or database [OK]

Common Mistakes:

• Confusing API testing with UI testing
• Thinking API tests create backend code
• Mixing API testing with database design

2. Which of the following is the correct way to check the HTTP status code in an automated API test using Python's requests library?

easy

A. response.code == 200

B. response.status == 200

C. response.status_code == 200

D. response.statusCode == 200

Solution

1. Step 1: Recall Python requests response attribute

   The correct attribute to get HTTP status code is status_code.

2. Step 2: Match options with correct attribute

   Only response.status_code == 200 uses the correct attribute and syntax.

3. Final Answer:

   response.status_code == 200 -> Option C

4. Quick Check:

   requests status code = status_code [OK]

Hint: Use response.status_code to check HTTP status in Python [OK]

Common Mistakes:

• Using incorrect attribute names like status or code
• Confusing camelCase with snake_case
• Forgetting double equals for comparison

3. Given this Python code snippet for an API test:

import requests
response = requests.get('https://api.example.com/data')
print(response.json()['status'])

What will be the output if the API response JSON is {"status": "success", "data": []}?

medium

A. "success"

B. KeyError

C. {'status': 'success'}

D. success

Solution

1. Step 1: Understand response.json() output

   response.json() returns a Python dictionary parsed from JSON.

2. Step 2: Access the 'status' key value

   Accessing ['status'] returns the string "success" without quotes in print output.

3. Final Answer:

   success -> Option D

4. Quick Check:

   Print dict value = string without quotes [OK]

Hint: Print of string value shows without quotes in Python [OK]

Common Mistakes:

• Expecting quotes around printed string
• Confusing JSON string with Python print output
• Assuming KeyError without checking keys

4. You wrote this API test code snippet:

response = requests.post('https://api.example.com/login', data={'user': 'admin', 'pass': '1234'})
assert response.status_code = 200

What is the error and how to fix it?

medium

A. Use '==' for comparison in assert, not '='

B. Change 'data' to 'json' in requests.post() call

C. Use 'response.status' instead of 'response.status_code'

D. Add parentheses around assert condition

Solution

1. Step 1: Identify syntax error in assert statement

   The assert statement uses '=' which is assignment, not comparison.

2. Step 2: Correct assert syntax

   Replace '=' with '==' to compare response.status_code to 200.

3. Final Answer:

   Use '==' for comparison in assert, not '=' -> Option A

4. Quick Check:

   Assert needs '==' for comparison [OK]

Hint: Assert uses '==' to compare, '=' assigns [OK]

Common Mistakes:

• Using '=' instead of '==' in assert
• Confusing 'data' and 'json' parameters (not error here)
• Using wrong attribute like response.status

5. You want to automate testing an API that returns a list of users with their ages. You need to verify the API only returns users aged 18 or older. Which approach best fits this requirement?

hard

A. Send a GET request, parse JSON response, then assert all ages >= 18

B. Send a POST request with age filter, then check status code 200

C. Check only the first user's age in the response

D. Verify the response content type is 'text/html'

Solution

1. Step 1: Understand requirement to verify all users' ages

   We must check every user's age is 18 or older in the response data.

2. Step 2: Choose approach that parses response and asserts condition on all users

   Sending GET, parsing JSON, and asserting all ages >= 18 matches the need.

3. Final Answer:

   Send a GET request, parse JSON response, then assert all ages >= 18 -> Option A

4. Quick Check:

   Check all data items for condition [OK]

Hint: Check all items, not just one, for correct data [OK]

Common Mistakes:

• Checking only first user age
• Using wrong HTTP method for retrieval
• Verifying wrong response content type