API Testing with Postman - Using tv4 to Validate API Schema

The video tutorial explains how to verify that an API adheres to its contract using schemas. It introduces the concept of schemas as a way to define API rules and demonstrates how to use the TV4 library in Postman for schema validation. A practical example with the Star Wars API is provided, showing how to create and run tests to ensure the API returns the correct data types. The video also covers handling validation errors and concludes with a summary of the key points discussed.

What is the primary purpose of an API schema?

• To define the user interface of an application

• To encrypt data transmitted by the API

• To specify the rules and structure of API responses

• To enhance the speed of API requests

Which library is used in Postman for validating API schemas?

• Node.js

• TV4

• React

• JQuery

In the Star Wars API example, what is the expected data type for the 'name' field?

• String

• Integer

• Boolean

• Array

What happens if the API returns a data type that does not match the schema's expectations?

• The API request is automatically retried

• The schema is updated to match the response

• The API response is ignored

• The schema validation test fails

Why is schema validation considered a powerful tool in API testing?

• It allows for faster API responses

• It ensures that APIs adhere to predefined contracts

• It automatically fixes errors in API responses

• It provides real-time data encryption