Using Query Parameters

Below is a sample Java program demonstrating how to test a GET request of a REST API using JUnit and Rest Assured, passing query parameters:

import io.restassured.RestAssured;
import io.restassured.response.Response;
import org.junit.jupiter.api.Test;

import static io.restassured.RestAssured.given;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class ApiGetWithQueryParametersTest {

    @Test
    public void testGetRequestWithQueryParameters() {
        // Base URI of the REST API
        RestAssured.baseURI = "https://api.example.com";

        // Query parameters
        String param1 = "value1";
        String param2 = "value2";

        // Send GET request with query parameters
        Response response = given()
                .queryParam("param1", param1)
                .queryParam("param2", param2)
                .get("/endpoint");

        // Get and assert the response status code
        int statusCode = response.getStatusCode();
        assertEquals(200, statusCode, "Expected status code 200");

        // Get and print the response body
        String responseBody = response.getBody().asString();
        System.out.println("Response Body:");
        System.out.println(responseBody);
    }
}

In this example:

• We import JUnit's @Test annotation and assertEquals method for assertions.
• We use the @Test annotation to mark the testGetRequestWithQueryParameters method as a test case.
• We set the base URI of the REST API using RestAssured.baseURI.
• We define query parameters (param1 and param2).
• We send a GET request to the /endpoint endpoint using given().queryParam("param1", param1).queryParam("param2", param2).get("/endpoint"), passing the query parameters using queryParam() method.
• We assert the response status code using JUnit's assertEquals method.
• We retrieve and print the response body.

Ensure that you have Rest Assured, JUnit, and its dependencies added to your project's classpath. You can run this test case using JUnit test runner. Additionally, you may need to handle exceptions such as IOException or NullPointerException depending on your specific requirements and error handling strategy. Adjust the base URI, endpoint, and query parameters according to your API's structure.