API test tools overview in Testing Fundamentals - Test Execution Trace

Test Overview

This test checks if the API test tool can send a GET request to a sample API endpoint and verify the response status code is 200, confirming the API is reachable and working.

Test Code - unittest

Testing Fundamentals

import requests
import unittest

class TestAPI(unittest.TestCase):
    def test_get_status_code(self):
        response = requests.get('https://jsonplaceholder.typicode.com/posts/1')
        self.assertEqual(response.status_code, 200)

if __name__ == '__main__':
    unittest.main()

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Test framework initializes the test case	-	PASS
2	Sends GET request to 'https://jsonplaceholder.typicode.com/posts/1'	Network call is made to the API endpoint	-	PASS
3	Receives response from API	Response object contains status code and data	-	PASS
4	Checks if response status code equals 200	Response status code is 200	self.assertEqual(response.status_code, 200)	PASS
5	Test ends with success	Test framework reports test passed	-	PASS

Failure Scenario

Failing Condition: API endpoint is unreachable or returns a status code other than 200

Execution Trace Quiz - 3 Questions

What does the test verify about the API?

A The API returns JSON data

B The API returns status code 200

C The API response time is under 1 second

D The API requires authentication

Key Result

Always verify the API response status code to confirm the endpoint is reachable and functioning before validating response data.