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Day 5: Working with JSON responses

Day 5: Working with JSON responses

On Day 5 of Rest Assured training, we will focus on working with JSON responses. JSON (JavaScript Object Notation) is a lightweight data interchange format that is widely used in web applications. JSON responses are returned by most of the APIs, and it's essential to know how to parse and validate these responses.

Rest Assured provides multiple ways to work with JSON responses. The most commonly used ones are JsonPath and Matchers. JsonPath is a library that provides a simple way to extract values from JSON documents. It's similar to XPath, but it's designed specifically for JSON data. Matchers, on the other hand, provide a set of methods to validate JSON responses against expected values.

To work with JSON responses in Rest Assured, we need to include the json-path and json-schema-validator dependencies in our project. Once we have these dependencies, we can use the get method to send a request to the API endpoint and retrieve the JSON response. We can then use JsonPath and Matchers to extract and validate the values from the response.

JsonPath provides a simple syntax to extract values from JSON documents. It uses dot notation to navigate through the JSON document and extract the values. For example, if we have the following JSON response: 



     {
  "name": "John Doe",
  "age": 30,
  "email": "johndoe@example.com"
}

We can extract the value of the name field using the following JsonPath expression:


     $.name

Matchers, on the other hand, provide a set of methods to validate JSON responses against expected values. For example, we can use the equalTo method to check if a value in the JSON response is equal to an expected value. We can use the hasKey method to check if a JSON response contains a specific key.


In summary, working with JSON responses is an essential skill when working with APIs, and Rest Assured provides a convenient way to parse and validate these responses. We can use JsonPath and Matchers to extract and validate the values from the JSON responses.

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