API Testing : REST API Testing using Python for Beginners

Explore the basics of HTTP, its move to HTTP/2, and how a client sends a request over TCP to a server, which responds in a request‑response model.

Explore how the three-way handshake establishes a reliable Dcp connection using synchronization and acknowledgment packets. Learn how sequence numbers and bidirectional acknowledgments ensure data integrity across global networks.

Explore the http request format, including the four parts: request line, request header, empty line, and request body, with examples of post requests and headers.

Examine the structure of http responses, including the status line and code, response headers, and the empty line before the body, with examples of content type and length.

Explore HTTP status codes and their meanings from 1xx to 5xx, with an example of 200 for success, and learn how servers respond to client requests.

Learn the basics of JSON, including its JavaScript object notation structure, key-value pairs, and how to represent data with objects and arrays for language-independent web APIs.

Learn xml fundamentals and how the extensible markup language represents data with opening and closing tags, human and machine readability, and a comparison to json for api testing tasks.

Explore the get method in REST APIs, mapping read operations to select statements and create, read, update, and delete actions, and learn to fetch lists and single resources using get.

Use the put method to update an existing employee id 7 by sending a modified payload to api/user/2, and verify a 200 response with the updated fields.

Delete the REST API resource using the delete method, test with JMeter, and verify a 2xx response with an empty body.

discover essential python modules for api testing: requests for http calls, json for data handling, and jsonpath for extraction, plus setup tips with PyCharm or Jupyter.

Explore the python requests module in detail and learn how to call a web service with a get request, inspect status code, content, headers, and text for API testing.

Parse json data in python by reading a json file, converting to dict with json.loads, and querying with jsonpath to assert values and navigate lists.

Learn to read json data from a file, convert it to a dictionary, use the jsonpath module to extract city and student data, and verify with assertions for api testing.

Test a REST API in Python by configuring the endpoint, using requests, json, and jsonpath to verify status 200, page value 3, and three data elements for API testing.

Test a post rest api end-to-end with python by sending json data to an api endpoint, then validate the generated id and created timestamp.

Perform put rest api testing by updating a user entry with id 2 and sending name and job values, and verify the response matches input with an updated date.

Learn how to test a delete rest api with python using a jupyter notebook and requests, verifying a 204 status code and zero response data.

Install the pytest module, organize tests into suites with functions that start with test, and run get and delete API tests using pytest, as shown.

Learn to perform end-to-end rest api testing with pytest by dynamically chaining get and delete requests, extracting data from the first response to feed the next, and validating cross-call consistency.