REST Assured with plain/text response body

Carvia Tech | July 23, 2020 | 2 min read | 1,339 views

REST assured does not configure Parser for text/plain type of response by default, so you must enable support for this manually.

Gradle Setup

You can check the latest version of REST Assured library at Maven Repository

dependencies {
    testImplementation ''
    testImplementation ''
    testImplementation ''
    testImplementation ''
    testImplementation group: '', name: 'rest-assured', version: '4.2.0'
    testImplementation ('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'

test {

We will be using JUNIT 5 Jupyter Platform for running tests.

RestController Setup

We will create a simple controller method that returns text/plain response.

Controller that returns text/plain
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

public class PingController {

    public String pong() {
        return "pong";

REST Assured Testcase

We will develop a simple test case that validates the full body text of GET /ping response.

REST Assured plain/text full body assertion
import io.restassured.RestAssured;
import io.restassured.parsing.Parser;
import org.junit.jupiter.api.Test;

import static io.restassured.module.mockmvc.RestAssuredMockMvc.given;
import static org.hamcrest.CoreMatchers.equalTo;

public class MockMvcTest {

    public void testMockMvcGetPlainText() {
        RestAssured.registerParser("text/plain", Parser.TEXT);  (1)
        given().standaloneSetup(new PingController())
                    .body(equalTo("pong"));     (2)
1 We are configuring REST Assured to handle text/plain type of response, which it does not handle by default.
2 We want to do full body content matching here, rather than partial json field matching.

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