java-tutorials/libraries/src/test/java/com/baeldung/tomcat/ProgrammaticTomcatTest.java

package com.baeldung.tomcat;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner;


import static junit.framework.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

/**
 * Created by adi on 1/14/18.
 */
@RunWith(BlockJUnit4ClassRunner.class)
public class ProgrammaticTomcatTest {

    private ProgrammaticTomcat tomcat = new ProgrammaticTomcat();

    @Before
    public void setUp() throws Exception {
        tomcat.startTomcat();
    }

    @After
    public void tearDown() throws Exception {
        tomcat.stopTomcat();
    }

    @Test
    public void givenTomcatStarted_whenAccessServlet_responseIsTestAndResponseHeaderIsSet() throws Exception {
        CloseableHttpClient httpClient = HttpClientBuilder
          .create()
          .build();
        HttpGet getServlet = new HttpGet("http://localhost:8080/my-servlet");

        HttpResponse response = httpClient.execute(getServlet);
        assertEquals(HttpStatus.SC_OK, response
          .getStatusLine()
          .getStatusCode());

        String myHeaderValue = response
          .getFirstHeader("myHeader")
          .getValue();
        assertEquals("myHeaderValue", myHeaderValue);

        HttpEntity responseEntity = response.getEntity();
        assertNotNull(responseEntity);

        String responseString = EntityUtils.toString(responseEntity, "UTF-8");
        assertEquals("test", responseString);
    }

}