Example of API Testing
Let’s say we have a simple API endpoint that returns information about users. We want to test this endpoint to ensure that it returns the correct data.
Create a Request in Postman:
- Open Postman and create a new request.
- Set the request method to GET.
- Enter the URL of the API endpoint you want to test, e.g., https://postman-echo.com/get
- Click on “Send” to send the request.
Validate the Response:
- Once you’ve sent the request, Postman will display the response received from the API.
- Verify that the response contains the expected data.
- Check the status code to ensure it’s a successful response (usually 200 OK).
Run Tests:
- In Postman, you can write tests to automate the validation process.
- Click on the “Tests” tab in the request window.
- Write JavaScript code to validate the response. For example:
pm.test("Status code is 200", function () {
pm.response.to.have.status(200);
});
pm.test("Response contains user data", function () {
var jsonData = pm.response.json();
pm.expect(jsonData.users).to.be.an('array');
pm.expect(jsonData.users.length).to.be.above(0);
});
- Click on “Send” again to run the tests.
View Test Results:
- Postman will display the results of the tests in the “Tests Results” tab.
- You’ll see whether each test passed or failed.
What is API Testing in Postman ?
APIs, or Application Programming Interfaces, have become the backbone of modern software development, facilitating communication and data transfer between various systems and applications. This article delves into the concept of API testing, a critical component in the software development lifecycle, ensuring the reliability, performance, and functionality of APIs.
Table of Content
- What is API Testing
- History of API Testing
- Example of API Testing
- Contract Testing
- Unit Testing
- End-to-End Testing
- Load Testing
- Features
- Advantages
- Disadvantages
- Automating API Testing
- The Future of API Testing
- Conclusion
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