REST Assured – Compare Two JSON using Jackson – Java Library

JsonNode equals method in Jackson API

The Jackson API abstract class JsonNode offers an equals() abstract method that can be used to compare node objects. The ObjectNode and ArrayNode classes implement the equals() method, an abstract method.

Full (deep) value equality is used to compare the equality of root nodes allowing for the comparison of entire JSON trees for equality.

Before calling the equal() method, we need to convert the given JSON to ObjectNode or ArrayNode.

The following point must be remembered while using the equals() method to compare two json using jackson:-

🚀 If JSON nodes are equal, the method mentioned above will return true.

🚀 JSON nodes' root elements' order is not important.

🚀 The JSON array's element order will differ and will be affected by it.

Comparing Two Json Objects using Jackson

The JsonNode.equals() method is used to compare the two JSON Objects. Let us understand the comparison of the two JSON objects with the help of an example.

Example:

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class sample {
    public static void main(String[] args) throws JsonMappingException, JsonProcessingException 
    {
        // Creating Object1
        
        String jOb1 = "{\r\n" +
            "  \"first_Name\": \"Harshit\",\r\n" +
            "  \"last_Name\": \"Tripathi\",\r\n" +
            "  \"address\": {\r\n" +
            "  \"city\": \"Delhi\",\r\n" +
            "  \"state\": \"India\"\r\n" +
            "  }\r\n" +
            "}";

        // Creating Object2

        String jOb2 = "{\r\n" +
            "  \"first_Name\": \"Harshit\",\r\n" +
            "  \"last_Name\": \"Tripathi\",\r\n" +
            "  \"address\": {\r\n" +
            "  \"city\": \"Delhi\",\r\n" +
            "  \"state\": \"India\"\r\n" +
            "  }\r\n" +
            "}";

        // Creating an object of ObjectMapper to read the objects in Json

        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode jsonNode1 = objectMapper.readTree(jOb1);
        JsonNode jsonNode2 = objectMapper.readTree(jOb2);

        // Compare two json using Jackson and displaying the result
        System.out.println(jsonNode1.equals(jsonNode2));
    }
}

You can also try this code with Online Java Compiler

Run Code

Output:

Comparing Two Json Arrays using Jackson

We will compare two JSON arrays using JsonNode.equals() method in the same way we compare two JSON Objects. Let us understand the comparison of the two JSON arrays with the help of an example.

Example:

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class sample {
    public static void main(String[] args)  throws JsonMappingException, JsonProcessingException {

        // Creating Array1

        String jsonArray1 = "[\r\n" +
            "  {\r\n" +
            "   \"first_Name\": \"Ram\",\r\n" +
            "    \"last_Name\": \"Tripathi\",\r\n" +
            "    \"address\": {\r\n" +
            "      \"city\": \"Mumbai\",\r\n" +
            "      \"country\": \"India\"\r\n" +
            "    }\r\n" +
            "  } \r\n" +
            "]";

        // Creating Array2

        String jsonArray2 = "[\r\n" +
            "  {\r\n" +
            "    \"first_Name\": \"Ram\",\r\n" +
            "    \"last_Name\": \"Tripathi\",\r\n" +
            "    \"address\": {\r\n" +
            "      \"city\": \"Mumbai\",\r\n" +
            "      \"country\": \"India\"\r\n" +
            "    }\r\n" +
            "  } \r\n" +
            "]";

        // Creating an object of ObjectMapper to read the Array in Json

        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode jsonNode1 = objectMapper.readTree(jsonArray1);
        JsonNode jsonNode2 = objectMapper.readTree(jsonArray2);

        // Compare two json using Jackson and displaying the result
        System.out.println(jsonNode1.equals(jsonNode2));
    }
}

Output:

Must Read Array of Objects in Java

Frequently Asked Questions

What is REST API Testing?

An open-source method for testing RESTful APIs for web applications is called REST API testing. It is mostly used to test web applications that use JSON and XML. All methods, including GET, PUT, POST, PATCH, and DELETE, are compatible. In Java, the REST API is a library.

What is JSON?

JSON stands for JavaScript Object Notation.  It originated from JavaScript. It is an open standard data-interchange format that is easy to read and write.

What is Jackson?

A fast JSON processor for Java is called Jackson. The most widely used library for serializing Java objects or maps to JSON and vice-versa. It depends on Java.

Why are projects using Maven?

Maven mainly helps download dependencies for Java-based applications, such as libraries or JAR files.

What is client-server architecture?

Using the client-server model, a server offers resources and services to one or more clients. Mail servers, web servers, and file servers are a few types. As a result, the server grants the request made by the client.

Conclusion

Congratulations on finishing the blog! We have discussed how to compare two json using Jackson dependencies of the Java library in Rest assured. We have further discussed the comparison of two JSON objects and arrays using Jackson.

We hope this blog has helped you enhance your knowledge of how to compare two json using Jackson in Rest Assured. Do not stop learning! We recommend you read some of our Rest Assured articles: 

✴️ Rest Assured Setup

✴️ Rest Assured- Static Import in Java

✴️ Rest Assured- Writing Response in a Text File
 

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