Spring Cloud Contract -如何测试简单的字符串响应？

import org.springframework.cloud.contract.spec.Contract

Contract.make {
    request {
        method 'GET'
        url '/api/string'
    }
    response {
        status 200
        body('Hello, World!')
    }
}

import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.cloud.contract.stubrunner.spring.AutoConfigureStubRunner;
import org.springframework.cloud.contract.stubrunner.spring.StubRunnerProperties;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

@SpringBootTest
@AutoConfigureStubRunner(
        ids = "com.example:string-service:+:stubs:8080",
        stubsMode = StubRunnerProperties.StubsMode.LOCAL
)
public class StringResponseTest {

    @Test
    public void testStringResponse() {
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:8080/api/string", String.class);
        assert response.getStatusCode().value() == 200;
        assert response.getBody().equals("Hello, World!");
    }
}