Simple WireMock transformer that converts the content to upper case

WireMockTransformerExample.java

import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
import static com.github.tomakehurst.wiremock.client.WireMock.anyUrl;
import static com.github.tomakehurst.wiremock.client.WireMock.get;
import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
import static org.junit.Assert.assertEquals;

import wiremock.org.apache.http.client.utils.URIBuilder;

import java.net.URI;
import java.net.URISyntaxException;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

import com.github.tomakehurst.wiremock.client.ResponseDefinitionBuilder;
import com.github.tomakehurst.wiremock.common.FileSource;
import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
import com.github.tomakehurst.wiremock.extension.Parameters;
import com.github.tomakehurst.wiremock.extension.ResponseDefinitionTransformer;
import com.github.tomakehurst.wiremock.http.Request;
import com.github.tomakehurst.wiremock.http.ResponseDefinition;
import com.github.tomakehurst.wiremock.junit.WireMockRule;
import com.sun.jersey.api.client.Client;

@SuppressWarnings("WeakerAccess")
public class WireMockTransformerExample {

    static int PORT = 8888;
    static String UPPER = "upper";

    @Rule
    public WireMockRule wireMockRule = new WireMockRule(
            new WireMockConfiguration().port(PORT).extensions(new ReversingTransformer()));

    Client client;
    ResponseDefinitionTransformer reversingTransformer;

    @Before
    public void setUp() {
        client = new Client();
        reversingTransformer = new ReversingTransformer();
    }

    @After
    public void tearDown() {
        client.destroy();
    }

    @Test
    public void exampleTest() throws URISyntaxException {
        String message = "Hello, world!";

        stubFor(get(anyUrl()).willReturn(aResponse().withBody(message).withTransformers(UPPER)));

        assertEquals(message.toUpperCase(), client.resource(wiremockUri()).get(String.class));
    }

    private URI wiremockUri() throws URISyntaxException {
        return new URIBuilder().setScheme("http").setHost("localhost").setPort(PORT).build();
    }

    private static class ReversingTransformer extends ResponseDefinitionTransformer {

        @Override
        public ResponseDefinition transform(Request request, ResponseDefinition responseDefinition, FileSource files,
                Parameters parameters) {
            return ResponseDefinitionBuilder.like(responseDefinition)
                                            .withBody(responseDefinition.getBody().toUpperCase())
                                            .build();
        }

        @Override
        public String getName() {
            return UPPER;
        }

        @Override
        public boolean applyGlobally() {
            return false;
        }
    }
}